Version Packages (beta)

[vercel-release-bot]

This PR was opened by the Changesets release GitHub action. When you're ready to do a release, you can merge this and the packages will be published to npm automatically. If you're not ready to do a release yet, that's fine, whenever you add more changesets to main, this PR will be updated.

⚠️⚠️⚠️⚠️⚠️⚠️

main is currently in pre mode so this branch has prereleases rather than normal releases. If you want to exit prereleases, run changeset pre exit on main.

⚠️⚠️⚠️⚠️⚠️⚠️

Releases

@workflow/ai@4.0.1-beta.38

Patch Changes

• #69525bfa52 Thanks @ctate! - Fix: Handle object-style finishReason for AI SDK v5/v6 compatibility

• Updated dependencies []:

  • workflow@4.0.1-beta.38

@workflow/cli@4.0.1-beta.38

Patch Changes

• #68480955e7 Thanks @VaguelySerious! - Allow opening UI without a valid local config detected, UI will show warning and watch folder

• Updated dependencies [f989613]:

  • @workflow/web@4.0.1-beta.22

@workflow/web@4.0.1-beta.22

Patch Changes

• #694f989613 Thanks @VaguelySerious! - Add error boundaries around tabs in run detail view

workflow@4.0.1-beta.38

Patch Changes

• Updated dependencies [80955e7]:
  • @workflow/cli@4.0.1-beta.38

@workflow/world-testing@4.0.1-beta.39

Patch Changes

• Updated dependencies [80955e7]:
  • @workflow/cli@4.0.1-beta.38
  • workflow@4.0.1-beta.38

[vercel]

The latest updates on your projects. Learn more about Vercel for GitHub.

Project	Deployment	Review	Updated (UTC)
example-nextjs-workflow-turbopack	Ready	Preview, Comment	Dec 28, 2025 5:03pm
example-nextjs-workflow-webpack	Ready	Preview, Comment	Dec 28, 2025 5:03pm
example-workflow	Ready	Preview, Comment	Dec 28, 2025 5:03pm
workbench-astro-workflow	Ready	Preview, Comment	Dec 28, 2025 5:03pm
workbench-express-workflow	Ready	Preview, Comment	Dec 28, 2025 5:03pm
workbench-fastify-workflow	Ready	Preview, Comment	Dec 28, 2025 5:03pm
workbench-hono-workflow	Ready	Preview, Comment	Dec 28, 2025 5:03pm
workbench-nitro-workflow	Ready	Preview, Comment	Dec 28, 2025 5:03pm
workbench-nuxt-workflow	Ready	Preview, Comment	Dec 28, 2025 5:03pm
workbench-sveltekit-workflow	Ready	Preview, Comment	Dec 28, 2025 5:03pm
workbench-vite-workflow	Ready	Preview, Comment	Dec 28, 2025 5:03pm
workflow-docs	Ready	Preview, Comment	Dec 28, 2025 5:03pm

[github-actions]

🧪 E2E Test Results

❌ Some tests failed

Summary

	Passed	Failed	Skipped	Total
✅ ▲ Vercel Production	286	0	11	297
❌ 💻 Local Development	236	26	8	270
✅ 📦 Local Production	262	0	8	270
✅ 🐘 Local Postgres	262	0	8	270
❌ 🪟 Windows	0	27	0	27
❌ 🌍 Community Worlds	80	40	0	120
Total	1126	93	35	1254

❌ Failed Tests

💻 Local Development (26 failed)

nuxt-stable (26 failed):

• addTenWorkflow
• addTenWorkflow
• promiseAllWorkflow
• promiseRaceWorkflow
• promiseAnyWorkflow
• readableStreamWorkflow
• hookWorkflow
• webhookWorkflow
• webhook route with invalid token
• sleepingWorkflow
• nullByteWorkflow
• workflowAndStepMetadataWorkflow
• outputStreamWorkflow
• outputStreamInsideStepWorkflow - getWritable() called inside step functions
• fetchWorkflow
• promiseRaceStressTestWorkflow
• retryAttemptCounterWorkflow
• retryableAndFatalErrorWorkflow
• stepDirectCallWorkflow - calling step functions directly outside workflow context
• crossFileErrorWorkflow - stack traces work across imported modules
• hookCleanupTestWorkflow - hook token reuse after workflow completion
• stepFunctionPassingWorkflow - step function references can be passed as arguments (without closure vars)
• stepFunctionWithClosureWorkflow - step function with closure variables passed as argument
• closureVariableWorkflow - nested step functions with closure variables
• spawnWorkflowFromStepWorkflow - spawning a child workflow using start() inside a step
• health check endpoint - workflow and step endpoints respond to __health query parameter

🪟 Windows (27 failed)

nextjs-turbopack (27 failed):

• addTenWorkflow
• addTenWorkflow
• should work with react rendering in step
• promiseAllWorkflow
• promiseRaceWorkflow
• promiseAnyWorkflow
• readableStreamWorkflow
• hookWorkflow
• webhookWorkflow
• webhook route with invalid token
• sleepingWorkflow
• nullByteWorkflow
• workflowAndStepMetadataWorkflow
• outputStreamWorkflow
• outputStreamInsideStepWorkflow - getWritable() called inside step functions
• fetchWorkflow
• promiseRaceStressTestWorkflow
• retryAttemptCounterWorkflow
• retryableAndFatalErrorWorkflow
• stepDirectCallWorkflow - calling step functions directly outside workflow context
• crossFileErrorWorkflow - stack traces work across imported modules
• hookCleanupTestWorkflow - hook token reuse after workflow completion
• stepFunctionPassingWorkflow - step function references can be passed as arguments (without closure vars)
• stepFunctionWithClosureWorkflow - step function with closure variables passed as argument
• closureVariableWorkflow - nested step functions with closure variables
• spawnWorkflowFromStepWorkflow - spawning a child workflow using start() inside a step
• health check endpoint - workflow and step endpoints respond to __health query parameter

🌍 Community Worlds (40 failed)

mongodb-dev (3 failed):

• dev e2e should rebuild on step change
• dev e2e should rebuild on workflow change
• dev e2e should rebuild on adding workflow file

mongodb (27 failed):

• addTenWorkflow
• addTenWorkflow
• should work with react rendering in step
• promiseAllWorkflow
• promiseRaceWorkflow
• promiseAnyWorkflow
• readableStreamWorkflow
• hookWorkflow
• webhookWorkflow
• webhook route with invalid token
• sleepingWorkflow
• nullByteWorkflow
• workflowAndStepMetadataWorkflow
• outputStreamWorkflow
• outputStreamInsideStepWorkflow - getWritable() called inside step functions
• fetchWorkflow
• promiseRaceStressTestWorkflow
• retryAttemptCounterWorkflow
• retryableAndFatalErrorWorkflow
• stepDirectCallWorkflow - calling step functions directly outside workflow context
• crossFileErrorWorkflow - stack traces work across imported modules
• hookCleanupTestWorkflow - hook token reuse after workflow completion
• stepFunctionPassingWorkflow - step function references can be passed as arguments (without closure vars)
• stepFunctionWithClosureWorkflow - step function with closure variables passed as argument
• closureVariableWorkflow - nested step functions with closure variables
• spawnWorkflowFromStepWorkflow - spawning a child workflow using start() inside a step
• health check endpoint - workflow and step endpoints respond to __health query parameter

redis (1 failed):

• webhookWorkflow

starter (8 failed):

• addTenWorkflow
• addTenWorkflow
• retryAttemptCounterWorkflow
• crossFileErrorWorkflow - stack traces work across imported modules
• hookCleanupTestWorkflow - hook token reuse after workflow completion
• stepFunctionPassingWorkflow - step function references can be passed as arguments (without closure vars)
• stepFunctionWithClosureWorkflow - step function with closure variables passed as argument
• spawnWorkflowFromStepWorkflow - spawning a child workflow using start() inside a step

turso (1 failed):

• webhookWorkflow

Details by Category

✅ ▲ Vercel Production

App	Passed	Failed	Skipped
✅ astro	26	0	1
✅ example	26	0	1
✅ express	26	0	1
✅ fastify	26	0	1
✅ hono	26	0	1
✅ nextjs-turbopack	26	0	1
✅ nextjs-webpack	26	0	1
✅ nitro	26	0	1
✅ nuxt	26	0	1
✅ sveltekit	26	0	1
✅ vite	26	0	1

❌ 💻 Local Development

App	Passed	Failed	Skipped
✅ astro-stable	26	0	1
✅ express-stable	26	0	1
✅ fastify-stable	26	0	1
✅ hono-stable	26	0	1
✅ nextjs-turbopack-stable	27	0	0
✅ nextjs-webpack-stable	27	0	0
✅ nitro-stable	26	0	1
❌ nuxt-stable	0	26	1
✅ sveltekit-stable	26	0	1
✅ vite-stable	26	0	1

✅ 📦 Local Production

App	Passed	Failed	Skipped
✅ astro-stable	26	0	1
✅ express-stable	26	0	1
✅ fastify-stable	26	0	1
✅ hono-stable	26	0	1
✅ nextjs-turbopack-stable	27	0	0
✅ nextjs-webpack-stable	27	0	0
✅ nitro-stable	26	0	1
✅ nuxt-stable	26	0	1
✅ sveltekit-stable	26	0	1
✅ vite-stable	26	0	1

✅ 🐘 Local Postgres

App	Passed	Failed	Skipped
✅ astro-stable	26	0	1
✅ express-stable	26	0	1
✅ fastify-stable	26	0	1
✅ hono-stable	26	0	1
✅ nextjs-turbopack-stable	27	0	0
✅ nextjs-webpack-stable	27	0	0
✅ nitro-stable	26	0	1
✅ nuxt-stable	26	0	1
✅ sveltekit-stable	26	0	1
✅ vite-stable	26	0	1

❌ 🪟 Windows

App	Passed	Failed	Skipped
❌ nextjs-turbopack	0	27	0

❌ 🌍 Community Worlds

App	Passed	Failed	Skipped
❌ mongodb-dev	0	3	0
❌ mongodb	0	27	0
✅ redis-dev	3	0	0
❌ redis	26	1	0
✅ starter-dev	3	0	0
❌ starter	19	8	0
✅ turso-dev	3	0	0
❌ turso	26	1	0

---

📋 View full workflow run

---

❌ Some E2E test jobs failed:

• Vercel Prod: success
• Local Dev: failure
• Local Prod: success
• Local Postgres: success
• Windows: success

Check the workflow run for details.

[github-actions]

📊 Benchmark Results

📈 Comparing against baseline from main branch. Green 🟢 = faster, Red 🔺 = slower.

workflow with no steps

💻 Local Development

World	Framework	Workflow Time	Wall Time	Overhead	Samples	vs Fastest
💻 Local	🥇 Next.js (Turbopack)	0.031s (-18.0% 🟢)	1.015s (~)	0.984s	10	1.00x
🌐 Starter	Next.js (Turbopack)	0.036s (+0.6%)	1.013s (~)	0.977s	10	1.17x
🌐 Redis	Next.js (Turbopack)	0.038s (-5.2% 🟢)	1.017s (~)	0.979s	10	1.24x
💻 Local	Nitro	0.043s (~)	1.008s (~)	0.964s	10	1.40x
💻 Local	Express	0.046s (+6.9% 🔺)	1.008s (~)	0.961s	10	1.50x
🌐 Turso	Next.js (Turbopack)	0.049s (-38.7% 🟢)	1.013s (~)	0.964s	10	1.59x
🌐 MongoDB	Next.js (Turbopack)	0.123s (+138.1% 🔺)	1.016s (~)	0.893s	10	3.97x
🐘 Postgres	Next.js (Turbopack)	0.290s (-18.3% 🟢)	1.021s (~)	0.730s	10	9.39x
🐘 Postgres	Nitro	0.304s (+1.8%)	1.012s (~)	0.709s	10	9.83x
🐘 Postgres	Express	0.326s (+11.1% 🔺)	1.014s (-0.6%)	0.688s	10	10.54x

▲ Production (Vercel)

World	Framework	Workflow Time	Wall Time	Overhead	Samples	vs Fastest
▲ Vercel	🥇 Nitro	0.545s (-7.2% 🟢)	1.667s (+12.0% 🔺)	1.122s	10	1.00x
▲ Vercel	Next.js (Turbopack)	0.559s (+4.6%)	1.397s (-13.4% 🟢)	0.839s	10	1.03x
▲ Vercel	Express	0.588s (+19.2% 🔺)	1.477s (+7.5% 🔺)	0.889s	10	1.08x

🔍 Observability: Nitro | Next.js (Turbopack) | Express

workflow with 1 step

💻 Local Development

World	Framework	Workflow Time	Wall Time	Overhead	Samples	vs Fastest
💻 Local	🥇 Next.js (Turbopack)	1.075s (-1.7%)	2.012s (~)	0.937s	10	1.00x
🌐 Starter	Next.js (Turbopack)	1.081s (~)	2.011s (~)	0.929s	10	1.01x
🌐 Redis	Next.js (Turbopack)	1.098s (~)	2.013s (~)	0.915s	10	1.02x
💻 Local	Nitro	1.114s (~)	2.006s (~)	0.891s	10	1.04x
💻 Local	Express	1.118s (~)	2.008s (~)	0.890s	10	1.04x
🌐 Turso	Next.js (Turbopack)	1.278s (-0.7%)	2.012s (~)	0.734s	10	1.19x
🌐 MongoDB	Next.js (Turbopack)	1.286s (-0.6%)	2.014s (~)	0.728s	10	1.20x
🐘 Postgres	Nitro	1.820s (-15.6% 🟢)	2.312s (-23.3% 🟢)	0.492s	10	1.69x
🐘 Postgres	Next.js (Turbopack)	1.855s (-20.5% 🟢)	2.017s (-33.1% 🟢)	0.162s	10	1.73x
🐘 Postgres	Express	2.160s (~)	3.015s (~)	0.855s	10	2.01x

▲ Production (Vercel)

World	Framework	Workflow Time	Wall Time	Overhead	Samples	vs Fastest
▲ Vercel	🥇 Next.js (Turbopack)	2.699s (+0.8%)	3.643s (-1.1%)	0.944s	10	1.00x
▲ Vercel	Nitro	2.707s (+8.7% 🔺)	3.680s (+1.7%)	0.974s	10	1.00x
▲ Vercel	Express	2.843s (+5.2% 🔺)	3.811s (+5.8% 🔺)	0.968s	10	1.05x

🔍 Observability: Next.js (Turbopack) | Nitro | Express

workflow with 10 sequential steps

💻 Local Development

World	Framework	Workflow Time	Wall Time	Overhead	Samples	vs Fastest
💻 Local	🥇 Next.js (Turbopack)	10.523s (-1.1%)	11.016s (~)	0.493s	5	1.00x
🌐 Starter	Next.js (Turbopack)	10.598s (~)	11.012s (~)	0.414s	5	1.01x
🌐 Redis	Next.js (Turbopack)	10.673s (~)	11.018s (~)	0.346s	5	1.01x
💻 Local	Nitro	10.789s (~)	11.012s (~)	0.224s	5	1.03x
💻 Local	Express	10.810s (~)	11.017s (~)	0.207s	5	1.03x
🌐 MongoDB	Next.js (Turbopack)	11.921s (-2.2%)	12.428s (-4.5%)	0.507s	5	1.13x
🌐 Turso	Next.js (Turbopack)	12.183s (~)	13.023s (~)	0.840s	5	1.16x
🐘 Postgres	Next.js (Turbopack)	15.190s (-13.5% 🟢)	16.039s (-12.1% 🟢)	0.848s	5	1.44x
🐘 Postgres	Nitro	15.251s (-25.5% 🟢)	16.027s (-23.8% 🟢)	0.776s	5	1.45x
🐘 Postgres	Express	20.426s (~)	21.028s (~)	0.602s	5	1.94x

▲ Production (Vercel)

World	Framework	Workflow Time	Wall Time	Overhead	Samples	vs Fastest
▲ Vercel	🥇 Nitro	21.507s (+1.3%)	22.528s (+2.4%)	1.021s	5	1.00x
▲ Vercel	Next.js (Turbopack)	21.614s (~)	22.343s (-0.7%)	0.730s	5	1.00x
▲ Vercel	Express	22.161s (+4.2%)	23.050s (+4.9%)	0.889s	5	1.03x

🔍 Observability: Nitro | Next.js (Turbopack) | Express

Promise.all with 10 concurrent steps

💻 Local Development

World	Framework	Workflow Time	Wall Time	Overhead	Samples	vs Fastest
💻 Local	🥇 Next.js (Turbopack)	1.335s (-4.8%)	2.012s (~)	0.677s	15	1.00x
🌐 Starter	Next.js (Turbopack)	1.345s (+0.6%)	2.008s (~)	0.663s	15	1.01x
🌐 Redis	Next.js (Turbopack)	1.363s (-0.6%)	2.010s (~)	0.647s	15	1.02x
💻 Local	Nitro	1.411s (~)	2.005s (~)	0.593s	15	1.06x
💻 Local	Express	1.428s (+1.1%)	2.007s (~)	0.578s	15	1.07x
🐘 Postgres	Nitro	1.924s (-19.0% 🟢)	2.078s (-31.0% 🟢)	0.154s	15	1.44x
🌐 Turso	Next.js (Turbopack)	2.115s (~)	3.016s (~)	0.901s	10	1.58x
🌐 MongoDB	Next.js (Turbopack)	2.133s (-1.2%)	3.014s (~)	0.881s	10	1.60x
🐘 Postgres	Next.js (Turbopack)	2.199s (+12.1% 🔺)	2.597s (+24.9% 🔺)	0.399s	12	1.65x
🐘 Postgres	Express	2.473s (+4.3%)	3.013s (~)	0.539s	10	1.85x

▲ Production (Vercel)

World	Framework	Workflow Time	Wall Time	Overhead	Samples	vs Fastest
▲ Vercel	🥇 Nitro	2.863s (+1.5%)	3.926s (+2.2%)	1.063s	8	1.00x
▲ Vercel	Next.js (Turbopack)	3.116s (+5.9% 🔺)	3.779s (-3.5%)	0.663s	8	1.09x
▲ Vercel	Express	3.295s (+22.6% 🔺)	4.156s (+15.3% 🔺)	0.861s	8	1.15x

🔍 Observability: Nitro | Next.js (Turbopack) | Express

Promise.all with 25 concurrent steps

💻 Local Development

World	Framework	Workflow Time	Wall Time	Overhead	Samples	vs Fastest
💻 Local	🥇 Next.js (Turbopack)	2.036s (-0.8%)	2.769s (-4.7%)	0.733s	11	1.00x
💻 Local	Nitro	2.222s (-1.1%)	3.150s (-1.3%)	0.928s	10	1.09x
💻 Local	Express	2.320s (+3.6%)	3.219s (+1.2%)	0.899s	10	1.14x
🌐 Starter	Next.js (Turbopack)	2.463s (~)	3.008s (~)	0.545s	10	1.21x
🌐 Redis	Next.js (Turbopack)	2.507s (+0.6%)	3.013s (~)	0.506s	10	1.23x
🐘 Postgres	Nitro	2.650s (-9.5% 🟢)	3.011s (-9.3% 🟢)	0.362s	10	1.30x
🐘 Postgres	Next.js (Turbopack)	2.650s (-0.6%)	3.014s (~)	0.364s	10	1.30x
🐘 Postgres	Express	2.842s (-7.1% 🟢)	3.011s (-18.6% 🟢)	0.169s	10	1.40x
🌐 MongoDB	Next.js (Turbopack)	4.680s (+2.3%)	5.182s (~)	0.502s	6	2.30x
🌐 Turso	Next.js (Turbopack)	4.709s (+1.7%)	5.185s (~)	0.476s	6	2.31x

▲ Production (Vercel)

World	Framework	Workflow Time	Wall Time	Overhead	Samples	vs Fastest
▲ Vercel	🥇 Express	3.074s (-7.4% 🟢)	3.726s (-5.5% 🟢)	0.652s	9	1.00x
▲ Vercel	Nitro	3.320s (-7.5% 🟢)	3.837s (-9.1% 🟢)	0.517s	8	1.08x
▲ Vercel	Next.js (Turbopack)	3.490s (-6.7% 🟢)	4.287s (-1.0%)	0.797s	7	1.14x

🔍 Observability: Express | Nitro | Next.js (Turbopack)

Promise.race with 10 concurrent steps

💻 Local Development

World	Framework	Workflow Time	Wall Time	Overhead	Samples	vs Fastest
💻 Local	🥇 Next.js (Turbopack)	1.359s (-1.3%)	2.012s (~)	0.654s	15	1.00x
🌐 Starter	Next.js (Turbopack)	1.359s (-0.9%)	2.007s (~)	0.648s	15	1.00x
🌐 Redis	Next.js (Turbopack)	1.367s (~)	2.009s (~)	0.642s	15	1.01x
💻 Local	Nitro	1.447s (+2.6%)	2.005s (~)	0.557s	15	1.07x
💻 Local	Express	1.450s (+1.5%)	2.006s (~)	0.555s	15	1.07x
🐘 Postgres	Nitro	1.798s (-9.1% 🟢)	2.009s (-6.8% 🟢)	0.210s	15	1.32x
🐘 Postgres	Next.js (Turbopack)	1.832s (+4.2%)	2.012s (~)	0.180s	15	1.35x
🐘 Postgres	Express	2.031s (+7.0% 🔺)	2.522s (+21.4% 🔺)	0.492s	12	1.49x
🌐 MongoDB	Next.js (Turbopack)	2.127s (~)	3.013s (~)	0.886s	10	1.57x
🌐 Turso	Next.js (Turbopack)	2.151s (+1.3%)	3.015s (~)	0.864s	10	1.58x

▲ Production (Vercel)

World	Framework	Workflow Time	Wall Time	Overhead	Samples	vs Fastest
▲ Vercel	🥇 Nitro	2.708s (~)	3.822s (+1.3%)	1.115s	8	1.00x
▲ Vercel	Express	2.888s (+9.6% 🔺)	3.577s (+1.6%)	0.689s	9	1.07x
▲ Vercel	Next.js (Turbopack)	3.025s (+7.4% 🔺)	3.790s (-2.7%)	0.765s	8	1.12x

🔍 Observability: Nitro | Express | Next.js (Turbopack)

Promise.race with 25 concurrent steps

💻 Local Development

World	Framework	Workflow Time	Wall Time	Overhead	Samples	vs Fastest
💻 Local	🥇 Next.js (Turbopack)	2.016s (-5.7% 🟢)	2.556s (-14.2% 🟢)	0.539s	12	1.00x
💻 Local	Nitro	2.240s (-0.9%)	3.181s (-1.0%)	0.940s	10	1.11x
💻 Local	Express	2.393s (+2.8%)	3.292s (+0.7%)	0.899s	10	1.19x
🌐 Redis	Next.js (Turbopack)	2.468s (~)	3.011s (~)	0.543s	10	1.22x
🌐 Starter	Next.js (Turbopack)	2.476s (+1.2%)	3.012s (~)	0.536s	10	1.23x
🐘 Postgres	Nitro	2.625s (+1.7%)	3.017s (~)	0.392s	10	1.30x
🐘 Postgres	Next.js (Turbopack)	2.718s (+10.8% 🔺)	3.022s (~)	0.304s	10	1.35x
🐘 Postgres	Express	2.789s (+1.6%)	3.014s (~)	0.226s	10	1.38x
🌐 Turso	Next.js (Turbopack)	4.675s (-3.3%)	5.188s (-3.0%)	0.513s	6	2.32x
🌐 MongoDB	Next.js (Turbopack)	4.689s (-2.0%)	5.183s (~)	0.494s	6	2.33x

▲ Production (Vercel)

World	Framework	Workflow Time	Wall Time	Overhead	Samples	vs Fastest
▲ Vercel	🥇 Nitro	2.932s (-8.4% 🟢)	3.706s (-4.7%)	0.774s	9	1.00x
▲ Vercel	Next.js (Turbopack)	2.993s (-3.0%)	3.796s (-2.1%)	0.803s	9	1.02x
▲ Vercel	Express	3.069s (-4.7%)	3.698s (~)	0.629s	9	1.05x

🔍 Observability: Nitro | Next.js (Turbopack) | Express

Stream Benchmarks(includes TTFB metrics)

workflow with stream

💻 Local Development

World	Framework	Workflow Time	TTFB	Slurp	Wall Time	Overhead	Samples	vs Fastest
💻 Local	🥇 Next.js (Turbopack)	0.107s (-24.2% 🟢)	1.003s (~)	0.023s (+41.0% 🔺)	1.034s (+0.7%)	0.927s	10	1.00x
🌐 Starter	Next.js (Turbopack)	0.130s (+1.2%)	1.005s (~)	0.000s (~)	1.011s (~)	0.881s	10	1.21x
🌐 Redis	Next.js (Turbopack)	0.142s (-3.0%)	1.005s (~)	0.000s (+Infinity% 🔺)	1.014s (~)	0.871s	10	1.33x
💻 Local	Nitro	0.178s (+0.9%)	0.993s (~)	0.017s (+17.2% 🔺)	1.023s (~)	0.846s	10	1.66x
💻 Local	Express	0.184s (+3.7%)	0.992s (~)	0.016s (+5.2% 🔺)	1.024s (~)	0.839s	10	1.72x
🌐 Turso	Next.js (Turbopack)	0.464s (-9.5% 🟢)	0.978s (+4.7%)	0.000s (+Infinity% 🔺)	1.013s (~)	0.550s	10	4.33x
🌐 MongoDB	Next.js (Turbopack)	0.508s (-3.9%)	0.937s (+1.9%)	0.000s (~)	1.014s (~)	0.506s	10	4.75x
🐘 Postgres	Nitro	1.385s (-39.5% 🟢)	1.647s (-40.1% 🟢)	0.000s (-100.0% 🟢)	2.011s (-33.3% 🟢)	0.626s	10	12.95x
🐘 Postgres	Next.js (Turbopack)	1.397s (-4.1%)	1.700s (+2.2%)	0.000s (NaN%)	2.022s (~)	0.626s	10	13.05x
🐘 Postgres	Express	2.375s (+4.1%)	2.668s (-3.5%)	0.000s (+Infinity% 🔺)	3.014s (~)	0.639s	10	22.20x

▲ Production (Vercel)

World	Framework	Workflow Time	TTFB	Slurp	Wall Time	Overhead	Samples	vs Fastest
▲ Vercel	🥇 Express	2.751s (+8.0% 🔺)	3.198s (+4.1%)	0.481s (+4.3%)	4.126s (+4.5%)	1.375s	10	1.00x
▲ Vercel	Next.js (Turbopack)	2.795s (+7.8% 🔺)	3.217s (~)	0.535s (-60.0% 🟢)	4.183s (-16.4% 🟢)	1.389s	10	1.02x
▲ Vercel	Nitro	2.889s (+6.5% 🔺)	3.249s (+2.0%)	0.718s (+108.1% 🔺)	4.493s (+12.6% 🔺)	1.604s	10	1.05x

🔍 Observability: Express | Next.js (Turbopack) | Nitro

Summary

Fastest Framework by World

Winner determined by most benchmark wins

World	🥇 Fastest Framework	Wins
💻 Local	Next.js (Turbopack)	8/8
🐘 Postgres	Nitro	6/8
▲ Vercel	Nitro	5/8

Fastest World by Framework

Winner determined by most benchmark wins

Framework	🥇 Fastest World	Wins
Express	💻 Local	8/8
Next.js (Turbopack)	💻 Local	8/8
Nitro	💻 Local	8/8

Column Definitions

• Workflow Time: Runtime reported by workflow (completedAt - createdAt) - primary metric
• TTFB: Time to First Byte - time from workflow start until first stream byte received (stream benchmarks only)
• Slurp: Time from first byte to complete stream consumption (stream benchmarks only)
• Wall Time: Total testbench time (trigger workflow + poll for result)
• Overhead: Testbench overhead (Wall Time - Workflow Time)
• Samples: Number of benchmark iterations run
• vs Fastest: How much slower compared to the fastest configuration for this benchmark

Worlds:

• 💻 Local: In-memory filesystem world (local development)
• 🐘 Postgres: PostgreSQL database world (local development)
• ▲ Vercel: Vercel production/preview deployment
• 🌐 Starter: Community world (local development)
• 🌐 Turso: Community world (local development)
• 🌐 MongoDB: Community world (local development)
• 🌐 Redis: Community world (local development)
• 🌐 Jazz: Community world (local development)

---

📋 View full workflow run

[vercel-release-bot]

This PR was opened by the Changesets release GitHub action. When you're ready to do a release, you can merge this and the packages will be published to npm automatically. If you're not ready to do a release yet, that's fine, whenever you add more changesets to main, this PR will be updated.

⚠️⚠️⚠️⚠️⚠️⚠️

main is currently in pre mode so this branch has prereleases rather than normal releases. If you want to exit prereleases, run changeset pre exit on main.

⚠️⚠️⚠️⚠️⚠️⚠️

Releases

@workflow/ai@4.0.1-beta.38

Patch Changes

• #69525bfa52 Thanks @ctate! - Fix: Handle object-style finishReason for AI SDK v5/v6 compatibility

• Updated dependencies []:

  • workflow@4.0.1-beta.38

@workflow/cli@4.0.1-beta.38

Patch Changes

• #68480955e7 Thanks @VaguelySerious! - Allow opening UI without a valid local config detected, UI will show warning and watch folder

• Updated dependencies [f989613]:

  • @workflow/web@4.0.1-beta.22

@workflow/web@4.0.1-beta.22

Patch Changes

• #694f989613 Thanks @VaguelySerious! - Add error boundaries around tabs in run detail view

workflow@4.0.1-beta.38

Patch Changes

• Updated dependencies [80955e7]:
  • @workflow/cli@4.0.1-beta.38

@workflow/world-testing@4.0.1-beta.39

Patch Changes

• Updated dependencies [80955e7]:
  • @workflow/cli@4.0.1-beta.38
  • workflow@4.0.1-beta.38

[vercel]

The latest updates on your projects. Learn more about Vercel for GitHub.

Project	Deployment	Review	Updated (UTC)
example-nextjs-workflow-turbopack	Ready	Preview, Comment	Dec 28, 2025 5:03pm
example-nextjs-workflow-webpack	Ready	Preview, Comment	Dec 28, 2025 5:03pm
example-workflow	Ready	Preview, Comment	Dec 28, 2025 5:03pm
workbench-astro-workflow	Ready	Preview, Comment	Dec 28, 2025 5:03pm
workbench-express-workflow	Ready	Preview, Comment	Dec 28, 2025 5:03pm
workbench-fastify-workflow	Ready	Preview, Comment	Dec 28, 2025 5:03pm
workbench-hono-workflow	Ready	Preview, Comment	Dec 28, 2025 5:03pm
workbench-nitro-workflow	Ready	Preview, Comment	Dec 28, 2025 5:03pm
workbench-nuxt-workflow	Ready	Preview, Comment	Dec 28, 2025 5:03pm
workbench-sveltekit-workflow	Ready	Preview, Comment	Dec 28, 2025 5:03pm
workbench-vite-workflow	Ready	Preview, Comment	Dec 28, 2025 5:03pm
workflow-docs	Ready	Preview, Comment	Dec 28, 2025 5:03pm

[github-actions]

🧪 E2E Test Results

❌ Some tests failed

Summary

	Passed	Failed	Skipped	Total
✅ ▲ Vercel Production	286	0	11	297
❌ 💻 Local Development	236	26	8	270
✅ 📦 Local Production	262	0	8	270
✅ 🐘 Local Postgres	262	0	8	270
❌ 🪟 Windows	0	27	0	27
❌ 🌍 Community Worlds	80	40	0	120
Total	1126	93	35	1254

❌ Failed Tests

💻 Local Development (26 failed)

nuxt-stable (26 failed):

• addTenWorkflow
• addTenWorkflow
• promiseAllWorkflow
• promiseRaceWorkflow
• promiseAnyWorkflow
• readableStreamWorkflow
• hookWorkflow
• webhookWorkflow
• webhook route with invalid token
• sleepingWorkflow
• nullByteWorkflow
• workflowAndStepMetadataWorkflow
• outputStreamWorkflow
• outputStreamInsideStepWorkflow - getWritable() called inside step functions
• fetchWorkflow
• promiseRaceStressTestWorkflow
• retryAttemptCounterWorkflow
• retryableAndFatalErrorWorkflow
• stepDirectCallWorkflow - calling step functions directly outside workflow context
• crossFileErrorWorkflow - stack traces work across imported modules
• hookCleanupTestWorkflow - hook token reuse after workflow completion
• stepFunctionPassingWorkflow - step function references can be passed as arguments (without closure vars)
• stepFunctionWithClosureWorkflow - step function with closure variables passed as argument
• closureVariableWorkflow - nested step functions with closure variables
• spawnWorkflowFromStepWorkflow - spawning a child workflow using start() inside a step
• health check endpoint - workflow and step endpoints respond to __health query parameter

🪟 Windows (27 failed)

nextjs-turbopack (27 failed):

• addTenWorkflow
• addTenWorkflow
• should work with react rendering in step
• promiseAllWorkflow
• promiseRaceWorkflow
• promiseAnyWorkflow
• readableStreamWorkflow
• hookWorkflow
• webhookWorkflow
• webhook route with invalid token
• sleepingWorkflow
• nullByteWorkflow
• workflowAndStepMetadataWorkflow
• outputStreamWorkflow
• outputStreamInsideStepWorkflow - getWritable() called inside step functions
• fetchWorkflow
• promiseRaceStressTestWorkflow
• retryAttemptCounterWorkflow
• retryableAndFatalErrorWorkflow
• stepDirectCallWorkflow - calling step functions directly outside workflow context
• crossFileErrorWorkflow - stack traces work across imported modules
• hookCleanupTestWorkflow - hook token reuse after workflow completion
• stepFunctionPassingWorkflow - step function references can be passed as arguments (without closure vars)
• stepFunctionWithClosureWorkflow - step function with closure variables passed as argument
• closureVariableWorkflow - nested step functions with closure variables
• spawnWorkflowFromStepWorkflow - spawning a child workflow using start() inside a step
• health check endpoint - workflow and step endpoints respond to __health query parameter

🌍 Community Worlds (40 failed)

mongodb-dev (3 failed):

• dev e2e should rebuild on step change
• dev e2e should rebuild on workflow change
• dev e2e should rebuild on adding workflow file

mongodb (27 failed):

• addTenWorkflow
• addTenWorkflow
• should work with react rendering in step
• promiseAllWorkflow
• promiseRaceWorkflow
• promiseAnyWorkflow
• readableStreamWorkflow
• hookWorkflow
• webhookWorkflow
• webhook route with invalid token
• sleepingWorkflow
• nullByteWorkflow
• workflowAndStepMetadataWorkflow
• outputStreamWorkflow
• outputStreamInsideStepWorkflow - getWritable() called inside step functions
• fetchWorkflow
• promiseRaceStressTestWorkflow
• retryAttemptCounterWorkflow
• retryableAndFatalErrorWorkflow
• stepDirectCallWorkflow - calling step functions directly outside workflow context
• crossFileErrorWorkflow - stack traces work across imported modules
• hookCleanupTestWorkflow - hook token reuse after workflow completion
• stepFunctionPassingWorkflow - step function references can be passed as arguments (without closure vars)
• stepFunctionWithClosureWorkflow - step function with closure variables passed as argument
• closureVariableWorkflow - nested step functions with closure variables
• spawnWorkflowFromStepWorkflow - spawning a child workflow using start() inside a step
• health check endpoint - workflow and step endpoints respond to __health query parameter

redis (1 failed):

• webhookWorkflow

starter (8 failed):

• addTenWorkflow
• addTenWorkflow
• retryAttemptCounterWorkflow
• crossFileErrorWorkflow - stack traces work across imported modules
• hookCleanupTestWorkflow - hook token reuse after workflow completion
• stepFunctionPassingWorkflow - step function references can be passed as arguments (without closure vars)
• stepFunctionWithClosureWorkflow - step function with closure variables passed as argument
• spawnWorkflowFromStepWorkflow - spawning a child workflow using start() inside a step

turso (1 failed):

• webhookWorkflow

Details by Category

✅ ▲ Vercel Production

App	Passed	Failed	Skipped
✅ astro	26	0	1
✅ example	26	0	1
✅ express	26	0	1
✅ fastify	26	0	1
✅ hono	26	0	1
✅ nextjs-turbopack	26	0	1
✅ nextjs-webpack	26	0	1
✅ nitro	26	0	1
✅ nuxt	26	0	1
✅ sveltekit	26	0	1
✅ vite	26	0	1

❌ 💻 Local Development

App	Passed	Failed	Skipped
✅ astro-stable	26	0	1
✅ express-stable	26	0	1
✅ fastify-stable	26	0	1
✅ hono-stable	26	0	1
✅ nextjs-turbopack-stable	27	0	0
✅ nextjs-webpack-stable	27	0	0
✅ nitro-stable	26	0	1
❌ nuxt-stable	0	26	1
✅ sveltekit-stable	26	0	1
✅ vite-stable	26	0	1

✅ 📦 Local Production

App	Passed	Failed	Skipped
✅ astro-stable	26	0	1
✅ express-stable	26	0	1
✅ fastify-stable	26	0	1
✅ hono-stable	26	0	1
✅ nextjs-turbopack-stable	27	0	0
✅ nextjs-webpack-stable	27	0	0
✅ nitro-stable	26	0	1
✅ nuxt-stable	26	0	1
✅ sveltekit-stable	26	0	1
✅ vite-stable	26	0	1

✅ 🐘 Local Postgres

App	Passed	Failed	Skipped
✅ astro-stable	26	0	1
✅ express-stable	26	0	1
✅ fastify-stable	26	0	1
✅ hono-stable	26	0	1
✅ nextjs-turbopack-stable	27	0	0
✅ nextjs-webpack-stable	27	0	0
✅ nitro-stable	26	0	1
✅ nuxt-stable	26	0	1
✅ sveltekit-stable	26	0	1
✅ vite-stable	26	0	1

❌ 🪟 Windows

App	Passed	Failed	Skipped
❌ nextjs-turbopack	0	27	0

❌ 🌍 Community Worlds

App	Passed	Failed	Skipped
❌ mongodb-dev	0	3	0
❌ mongodb	0	27	0
✅ redis-dev	3	0	0
❌ redis	26	1	0
✅ starter-dev	3	0	0
❌ starter	19	8	0
✅ turso-dev	3	0	0
❌ turso	26	1	0

---

📋 View full workflow run

---

❌ Some E2E test jobs failed:

• Vercel Prod: success
• Local Dev: failure
• Local Prod: success
• Local Postgres: success
• Windows: success

Check the workflow run for details.

[github-actions]

📊 Benchmark Results

📈 Comparing against baseline from main branch. Green 🟢 = faster, Red 🔺 = slower.

workflow with no steps

💻 Local Development

World	Framework	Workflow Time	Wall Time	Overhead	Samples	vs Fastest
💻 Local	🥇 Next.js (Turbopack)	0.031s (-18.0% 🟢)	1.015s (~)	0.984s	10	1.00x
🌐 Starter	Next.js (Turbopack)	0.036s (+0.6%)	1.013s (~)	0.977s	10	1.17x
🌐 Redis	Next.js (Turbopack)	0.038s (-5.2% 🟢)	1.017s (~)	0.979s	10	1.24x
💻 Local	Nitro	0.043s (~)	1.008s (~)	0.964s	10	1.40x
💻 Local	Express	0.046s (+6.9% 🔺)	1.008s (~)	0.961s	10	1.50x
🌐 Turso	Next.js (Turbopack)	0.049s (-38.7% 🟢)	1.013s (~)	0.964s	10	1.59x
🌐 MongoDB	Next.js (Turbopack)	0.123s (+138.1% 🔺)	1.016s (~)	0.893s	10	3.97x
🐘 Postgres	Next.js (Turbopack)	0.290s (-18.3% 🟢)	1.021s (~)	0.730s	10	9.39x
🐘 Postgres	Nitro	0.304s (+1.8%)	1.012s (~)	0.709s	10	9.83x
🐘 Postgres	Express	0.326s (+11.1% 🔺)	1.014s (-0.6%)	0.688s	10	10.54x

▲ Production (Vercel)

World	Framework	Workflow Time	Wall Time	Overhead	Samples	vs Fastest
▲ Vercel	🥇 Nitro	0.545s (-7.2% 🟢)	1.667s (+12.0% 🔺)	1.122s	10	1.00x
▲ Vercel	Next.js (Turbopack)	0.559s (+4.6%)	1.397s (-13.4% 🟢)	0.839s	10	1.03x
▲ Vercel	Express	0.588s (+19.2% 🔺)	1.477s (+7.5% 🔺)	0.889s	10	1.08x

🔍 Observability: Nitro | Next.js (Turbopack) | Express

workflow with 1 step

💻 Local Development

World	Framework	Workflow Time	Wall Time	Overhead	Samples	vs Fastest
💻 Local	🥇 Next.js (Turbopack)	1.075s (-1.7%)	2.012s (~)	0.937s	10	1.00x
🌐 Starter	Next.js (Turbopack)	1.081s (~)	2.011s (~)	0.929s	10	1.01x
🌐 Redis	Next.js (Turbopack)	1.098s (~)	2.013s (~)	0.915s	10	1.02x
💻 Local	Nitro	1.114s (~)	2.006s (~)	0.891s	10	1.04x
💻 Local	Express	1.118s (~)	2.008s (~)	0.890s	10	1.04x
🌐 Turso	Next.js (Turbopack)	1.278s (-0.7%)	2.012s (~)	0.734s	10	1.19x
🌐 MongoDB	Next.js (Turbopack)	1.286s (-0.6%)	2.014s (~)	0.728s	10	1.20x
🐘 Postgres	Nitro	1.820s (-15.6% 🟢)	2.312s (-23.3% 🟢)	0.492s	10	1.69x
🐘 Postgres	Next.js (Turbopack)	1.855s (-20.5% 🟢)	2.017s (-33.1% 🟢)	0.162s	10	1.73x
🐘 Postgres	Express	2.160s (~)	3.015s (~)	0.855s	10	2.01x

▲ Production (Vercel)

World	Framework	Workflow Time	Wall Time	Overhead	Samples	vs Fastest
▲ Vercel	🥇 Next.js (Turbopack)	2.699s (+0.8%)	3.643s (-1.1%)	0.944s	10	1.00x
▲ Vercel	Nitro	2.707s (+8.7% 🔺)	3.680s (+1.7%)	0.974s	10	1.00x
▲ Vercel	Express	2.843s (+5.2% 🔺)	3.811s (+5.8% 🔺)	0.968s	10	1.05x

🔍 Observability: Next.js (Turbopack) | Nitro | Express

workflow with 10 sequential steps

💻 Local Development

World	Framework	Workflow Time	Wall Time	Overhead	Samples	vs Fastest
💻 Local	🥇 Next.js (Turbopack)	10.523s (-1.1%)	11.016s (~)	0.493s	5	1.00x
🌐 Starter	Next.js (Turbopack)	10.598s (~)	11.012s (~)	0.414s	5	1.01x
🌐 Redis	Next.js (Turbopack)	10.673s (~)	11.018s (~)	0.346s	5	1.01x
💻 Local	Nitro	10.789s (~)	11.012s (~)	0.224s	5	1.03x
💻 Local	Express	10.810s (~)	11.017s (~)	0.207s	5	1.03x
🌐 MongoDB	Next.js (Turbopack)	11.921s (-2.2%)	12.428s (-4.5%)	0.507s	5	1.13x
🌐 Turso	Next.js (Turbopack)	12.183s (~)	13.023s (~)	0.840s	5	1.16x
🐘 Postgres	Next.js (Turbopack)	15.190s (-13.5% 🟢)	16.039s (-12.1% 🟢)	0.848s	5	1.44x
🐘 Postgres	Nitro	15.251s (-25.5% 🟢)	16.027s (-23.8% 🟢)	0.776s	5	1.45x
🐘 Postgres	Express	20.426s (~)	21.028s (~)	0.602s	5	1.94x

▲ Production (Vercel)

World	Framework	Workflow Time	Wall Time	Overhead	Samples	vs Fastest
▲ Vercel	🥇 Nitro	21.507s (+1.3%)	22.528s (+2.4%)	1.021s	5	1.00x
▲ Vercel	Next.js (Turbopack)	21.614s (~)	22.343s (-0.7%)	0.730s	5	1.00x
▲ Vercel	Express	22.161s (+4.2%)	23.050s (+4.9%)	0.889s	5	1.03x

🔍 Observability: Nitro | Next.js (Turbopack) | Express

Promise.all with 10 concurrent steps

💻 Local Development

World	Framework	Workflow Time	Wall Time	Overhead	Samples	vs Fastest
💻 Local	🥇 Next.js (Turbopack)	1.335s (-4.8%)	2.012s (~)	0.677s	15	1.00x
🌐 Starter	Next.js (Turbopack)	1.345s (+0.6%)	2.008s (~)	0.663s	15	1.01x
🌐 Redis	Next.js (Turbopack)	1.363s (-0.6%)	2.010s (~)	0.647s	15	1.02x
💻 Local	Nitro	1.411s (~)	2.005s (~)	0.593s	15	1.06x
💻 Local	Express	1.428s (+1.1%)	2.007s (~)	0.578s	15	1.07x
🐘 Postgres	Nitro	1.924s (-19.0% 🟢)	2.078s (-31.0% 🟢)	0.154s	15	1.44x
🌐 Turso	Next.js (Turbopack)	2.115s (~)	3.016s (~)	0.901s	10	1.58x
🌐 MongoDB	Next.js (Turbopack)	2.133s (-1.2%)	3.014s (~)	0.881s	10	1.60x
🐘 Postgres	Next.js (Turbopack)	2.199s (+12.1% 🔺)	2.597s (+24.9% 🔺)	0.399s	12	1.65x
🐘 Postgres	Express	2.473s (+4.3%)	3.013s (~)	0.539s	10	1.85x

▲ Production (Vercel)

World	Framework	Workflow Time	Wall Time	Overhead	Samples	vs Fastest
▲ Vercel	🥇 Nitro	2.863s (+1.5%)	3.926s (+2.2%)	1.063s	8	1.00x
▲ Vercel	Next.js (Turbopack)	3.116s (+5.9% 🔺)	3.779s (-3.5%)	0.663s	8	1.09x
▲ Vercel	Express	3.295s (+22.6% 🔺)	4.156s (+15.3% 🔺)	0.861s	8	1.15x

🔍 Observability: Nitro | Next.js (Turbopack) | Express

Promise.all with 25 concurrent steps

💻 Local Development

World	Framework	Workflow Time	Wall Time	Overhead	Samples	vs Fastest
💻 Local	🥇 Next.js (Turbopack)	2.036s (-0.8%)	2.769s (-4.7%)	0.733s	11	1.00x
💻 Local	Nitro	2.222s (-1.1%)	3.150s (-1.3%)	0.928s	10	1.09x
💻 Local	Express	2.320s (+3.6%)	3.219s (+1.2%)	0.899s	10	1.14x
🌐 Starter	Next.js (Turbopack)	2.463s (~)	3.008s (~)	0.545s	10	1.21x
🌐 Redis	Next.js (Turbopack)	2.507s (+0.6%)	3.013s (~)	0.506s	10	1.23x
🐘 Postgres	Nitro	2.650s (-9.5% 🟢)	3.011s (-9.3% 🟢)	0.362s	10	1.30x
🐘 Postgres	Next.js (Turbopack)	2.650s (-0.6%)	3.014s (~)	0.364s	10	1.30x
🐘 Postgres	Express	2.842s (-7.1% 🟢)	3.011s (-18.6% 🟢)	0.169s	10	1.40x
🌐 MongoDB	Next.js (Turbopack)	4.680s (+2.3%)	5.182s (~)	0.502s	6	2.30x
🌐 Turso	Next.js (Turbopack)	4.709s (+1.7%)	5.185s (~)	0.476s	6	2.31x

▲ Production (Vercel)

World	Framework	Workflow Time	Wall Time	Overhead	Samples	vs Fastest
▲ Vercel	🥇 Express	3.074s (-7.4% 🟢)	3.726s (-5.5% 🟢)	0.652s	9	1.00x
▲ Vercel	Nitro	3.320s (-7.5% 🟢)	3.837s (-9.1% 🟢)	0.517s	8	1.08x
▲ Vercel	Next.js (Turbopack)	3.490s (-6.7% 🟢)	4.287s (-1.0%)	0.797s	7	1.14x

🔍 Observability: Express | Nitro | Next.js (Turbopack)

Promise.race with 10 concurrent steps

💻 Local Development

World	Framework	Workflow Time	Wall Time	Overhead	Samples	vs Fastest
💻 Local	🥇 Next.js (Turbopack)	1.359s (-1.3%)	2.012s (~)	0.654s	15	1.00x
🌐 Starter	Next.js (Turbopack)	1.359s (-0.9%)	2.007s (~)	0.648s	15	1.00x
🌐 Redis	Next.js (Turbopack)	1.367s (~)	2.009s (~)	0.642s	15	1.01x
💻 Local	Nitro	1.447s (+2.6%)	2.005s (~)	0.557s	15	1.07x
💻 Local	Express	1.450s (+1.5%)	2.006s (~)	0.555s	15	1.07x
🐘 Postgres	Nitro	1.798s (-9.1% 🟢)	2.009s (-6.8% 🟢)	0.210s	15	1.32x
🐘 Postgres	Next.js (Turbopack)	1.832s (+4.2%)	2.012s (~)	0.180s	15	1.35x
🐘 Postgres	Express	2.031s (+7.0% 🔺)	2.522s (+21.4% 🔺)	0.492s	12	1.49x
🌐 MongoDB	Next.js (Turbopack)	2.127s (~)	3.013s (~)	0.886s	10	1.57x
🌐 Turso	Next.js (Turbopack)	2.151s (+1.3%)	3.015s (~)	0.864s	10	1.58x

▲ Production (Vercel)

World	Framework	Workflow Time	Wall Time	Overhead	Samples	vs Fastest
▲ Vercel	🥇 Nitro	2.708s (~)	3.822s (+1.3%)	1.115s	8	1.00x
▲ Vercel	Express	2.888s (+9.6% 🔺)	3.577s (+1.6%)	0.689s	9	1.07x
▲ Vercel	Next.js (Turbopack)	3.025s (+7.4% 🔺)	3.790s (-2.7%)	0.765s	8	1.12x

🔍 Observability: Nitro | Express | Next.js (Turbopack)

Promise.race with 25 concurrent steps

💻 Local Development

World	Framework	Workflow Time	Wall Time	Overhead	Samples	vs Fastest
💻 Local	🥇 Next.js (Turbopack)	2.016s (-5.7% 🟢)	2.556s (-14.2% 🟢)	0.539s	12	1.00x
💻 Local	Nitro	2.240s (-0.9%)	3.181s (-1.0%)	0.940s	10	1.11x
💻 Local	Express	2.393s (+2.8%)	3.292s (+0.7%)	0.899s	10	1.19x
🌐 Redis	Next.js (Turbopack)	2.468s (~)	3.011s (~)	0.543s	10	1.22x
🌐 Starter	Next.js (Turbopack)	2.476s (+1.2%)	3.012s (~)	0.536s	10	1.23x
🐘 Postgres	Nitro	2.625s (+1.7%)	3.017s (~)	0.392s	10	1.30x
🐘 Postgres	Next.js (Turbopack)	2.718s (+10.8% 🔺)	3.022s (~)	0.304s	10	1.35x
🐘 Postgres	Express	2.789s (+1.6%)	3.014s (~)	0.226s	10	1.38x
🌐 Turso	Next.js (Turbopack)	4.675s (-3.3%)	5.188s (-3.0%)	0.513s	6	2.32x
🌐 MongoDB	Next.js (Turbopack)	4.689s (-2.0%)	5.183s (~)	0.494s	6	2.33x

▲ Production (Vercel)

World	Framework	Workflow Time	Wall Time	Overhead	Samples	vs Fastest
▲ Vercel	🥇 Nitro	2.932s (-8.4% 🟢)	3.706s (-4.7%)	0.774s	9	1.00x
▲ Vercel	Next.js (Turbopack)	2.993s (-3.0%)	3.796s (-2.1%)	0.803s	9	1.02x
▲ Vercel	Express	3.069s (-4.7%)	3.698s (~)	0.629s	9	1.05x

🔍 Observability: Nitro | Next.js (Turbopack) | Express

Stream Benchmarks(includes TTFB metrics)

workflow with stream

💻 Local Development

World	Framework	Workflow Time	TTFB	Slurp	Wall Time	Overhead	Samples	vs Fastest
💻 Local	🥇 Next.js (Turbopack)	0.107s (-24.2% 🟢)	1.003s (~)	0.023s (+41.0% 🔺)	1.034s (+0.7%)	0.927s	10	1.00x
🌐 Starter	Next.js (Turbopack)	0.130s (+1.2%)	1.005s (~)	0.000s (~)	1.011s (~)	0.881s	10	1.21x
🌐 Redis	Next.js (Turbopack)	0.142s (-3.0%)	1.005s (~)	0.000s (+Infinity% 🔺)	1.014s (~)	0.871s	10	1.33x
💻 Local	Nitro	0.178s (+0.9%)	0.993s (~)	0.017s (+17.2% 🔺)	1.023s (~)	0.846s	10	1.66x
💻 Local	Express	0.184s (+3.7%)	0.992s (~)	0.016s (+5.2% 🔺)	1.024s (~)	0.839s	10	1.72x
🌐 Turso	Next.js (Turbopack)	0.464s (-9.5% 🟢)	0.978s (+4.7%)	0.000s (+Infinity% 🔺)	1.013s (~)	0.550s	10	4.33x
🌐 MongoDB	Next.js (Turbopack)	0.508s (-3.9%)	0.937s (+1.9%)	0.000s (~)	1.014s (~)	0.506s	10	4.75x
🐘 Postgres	Nitro	1.385s (-39.5% 🟢)	1.647s (-40.1% 🟢)	0.000s (-100.0% 🟢)	2.011s (-33.3% 🟢)	0.626s	10	12.95x
🐘 Postgres	Next.js (Turbopack)	1.397s (-4.1%)	1.700s (+2.2%)	0.000s (NaN%)	2.022s (~)	0.626s	10	13.05x
🐘 Postgres	Express	2.375s (+4.1%)	2.668s (-3.5%)	0.000s (+Infinity% 🔺)	3.014s (~)	0.639s	10	22.20x

▲ Production (Vercel)

World	Framework	Workflow Time	TTFB	Slurp	Wall Time	Overhead	Samples	vs Fastest
▲ Vercel	🥇 Express	2.751s (+8.0% 🔺)	3.198s (+4.1%)	0.481s (+4.3%)	4.126s (+4.5%)	1.375s	10	1.00x
▲ Vercel	Next.js (Turbopack)	2.795s (+7.8% 🔺)	3.217s (~)	0.535s (-60.0% 🟢)	4.183s (-16.4% 🟢)	1.389s	10	1.02x
▲ Vercel	Nitro	2.889s (+6.5% 🔺)	3.249s (+2.0%)	0.718s (+108.1% 🔺)	4.493s (+12.6% 🔺)	1.604s	10	1.05x

🔍 Observability: Express | Next.js (Turbopack) | Nitro

Summary

Fastest Framework by World

Winner determined by most benchmark wins

World	🥇 Fastest Framework	Wins
💻 Local	Next.js (Turbopack)	8/8
🐘 Postgres	Nitro	6/8
▲ Vercel	Nitro	5/8

Fastest World by Framework

Winner determined by most benchmark wins

Framework	🥇 Fastest World	Wins
Express	💻 Local	8/8
Next.js (Turbopack)	💻 Local	8/8
Nitro	💻 Local	8/8

Column Definitions

• Workflow Time: Runtime reported by workflow (completedAt - createdAt) - primary metric
• TTFB: Time to First Byte - time from workflow start until first stream byte received (stream benchmarks only)
• Slurp: Time from first byte to complete stream consumption (stream benchmarks only)
• Wall Time: Total testbench time (trigger workflow + poll for result)
• Overhead: Testbench overhead (Wall Time - Workflow Time)
• Samples: Number of benchmark iterations run
• vs Fastest: How much slower compared to the fastest configuration for this benchmark

Worlds:

• 💻 Local: In-memory filesystem world (local development)
• 🐘 Postgres: PostgreSQL database world (local development)
• ▲ Vercel: Vercel production/preview deployment
• 🌐 Starter: Community world (local development)
• 🌐 Turso: Community world (local development)
• 🌐 MongoDB: Community world (local development)
• 🌐 Redis: Community world (local development)
• 🌐 Jazz: Community world (local development)

---

📋 View full workflow run

[vercel-release-bot]

This PR was opened by the Changesets release GitHub action. When you're ready to do a release, you can merge this and the packages will be published to npm automatically. If you're not ready to do a release yet, that's fine, whenever you add more changesets to main, this PR will be updated.

⚠️⚠️⚠️⚠️⚠️⚠️

main is currently in pre mode so this branch has prereleases rather than normal releases. If you want to exit prereleases, run changeset pre exit on main.

⚠️⚠️⚠️⚠️⚠️⚠️

Releases

@workflow/ai@4.0.1-beta.38

Patch Changes

• #69525bfa52 Thanks @ctate! - Fix: Handle object-style finishReason for AI SDK v5/v6 compatibility

• Updated dependencies []:

  • workflow@4.0.1-beta.38

@workflow/cli@4.0.1-beta.38

Patch Changes

• #68480955e7 Thanks @VaguelySerious! - Allow opening UI without a valid local config detected, UI will show warning and watch folder

• Updated dependencies [f989613]:

  • @workflow/web@4.0.1-beta.22

@workflow/web@4.0.1-beta.22

Patch Changes

• #694f989613 Thanks @VaguelySerious! - Add error boundaries around tabs in run detail view

workflow@4.0.1-beta.38

Patch Changes

• Updated dependencies [80955e7]:
  • @workflow/cli@4.0.1-beta.38

@workflow/world-testing@4.0.1-beta.39

Patch Changes

• Updated dependencies [80955e7]:
  • @workflow/cli@4.0.1-beta.38
  • workflow@4.0.1-beta.38

[vercel]

The latest updates on your projects. Learn more about Vercel for GitHub.

Project	Deployment	Review	Updated (UTC)
example-nextjs-workflow-turbopack	Ready	Preview, Comment	Dec 28, 2025 5:03pm
example-nextjs-workflow-webpack	Ready	Preview, Comment	Dec 28, 2025 5:03pm
example-workflow	Ready	Preview, Comment	Dec 28, 2025 5:03pm
workbench-astro-workflow	Ready	Preview, Comment	Dec 28, 2025 5:03pm
workbench-express-workflow	Ready	Preview, Comment	Dec 28, 2025 5:03pm
workbench-fastify-workflow	Ready	Preview, Comment	Dec 28, 2025 5:03pm
workbench-hono-workflow	Ready	Preview, Comment	Dec 28, 2025 5:03pm
workbench-nitro-workflow	Ready	Preview, Comment	Dec 28, 2025 5:03pm
workbench-nuxt-workflow	Ready	Preview, Comment	Dec 28, 2025 5:03pm
workbench-sveltekit-workflow	Ready	Preview, Comment	Dec 28, 2025 5:03pm
workbench-vite-workflow	Ready	Preview, Comment	Dec 28, 2025 5:03pm
workflow-docs	Ready	Preview, Comment	Dec 28, 2025 5:03pm

[github-actions]

🧪 E2E Test Results

❌ Some tests failed

Summary

	Passed	Failed	Skipped	Total
✅ ▲ Vercel Production	286	0	11	297
❌ 💻 Local Development	236	26	8	270
✅ 📦 Local Production	262	0	8	270
✅ 🐘 Local Postgres	262	0	8	270
❌ 🪟 Windows	0	27	0	27
❌ 🌍 Community Worlds	80	40	0	120
Total	1126	93	35	1254

❌ Failed Tests

💻 Local Development (26 failed)

nuxt-stable (26 failed):

• addTenWorkflow
• addTenWorkflow
• promiseAllWorkflow
• promiseRaceWorkflow
• promiseAnyWorkflow
• readableStreamWorkflow
• hookWorkflow
• webhookWorkflow
• webhook route with invalid token
• sleepingWorkflow
• nullByteWorkflow
• workflowAndStepMetadataWorkflow
• outputStreamWorkflow
• outputStreamInsideStepWorkflow - getWritable() called inside step functions
• fetchWorkflow
• promiseRaceStressTestWorkflow
• retryAttemptCounterWorkflow
• retryableAndFatalErrorWorkflow
• stepDirectCallWorkflow - calling step functions directly outside workflow context
• crossFileErrorWorkflow - stack traces work across imported modules
• hookCleanupTestWorkflow - hook token reuse after workflow completion
• stepFunctionPassingWorkflow - step function references can be passed as arguments (without closure vars)
• stepFunctionWithClosureWorkflow - step function with closure variables passed as argument
• closureVariableWorkflow - nested step functions with closure variables
• spawnWorkflowFromStepWorkflow - spawning a child workflow using start() inside a step
• health check endpoint - workflow and step endpoints respond to __health query parameter

🪟 Windows (27 failed)

nextjs-turbopack (27 failed):

• addTenWorkflow
• addTenWorkflow
• should work with react rendering in step
• promiseAllWorkflow
• promiseRaceWorkflow
• promiseAnyWorkflow
• readableStreamWorkflow
• hookWorkflow
• webhookWorkflow
• webhook route with invalid token
• sleepingWorkflow
• nullByteWorkflow
• workflowAndStepMetadataWorkflow
• outputStreamWorkflow
• outputStreamInsideStepWorkflow - getWritable() called inside step functions
• fetchWorkflow
• promiseRaceStressTestWorkflow
• retryAttemptCounterWorkflow
• retryableAndFatalErrorWorkflow
• stepDirectCallWorkflow - calling step functions directly outside workflow context
• crossFileErrorWorkflow - stack traces work across imported modules
• hookCleanupTestWorkflow - hook token reuse after workflow completion
• stepFunctionPassingWorkflow - step function references can be passed as arguments (without closure vars)
• stepFunctionWithClosureWorkflow - step function with closure variables passed as argument
• closureVariableWorkflow - nested step functions with closure variables
• spawnWorkflowFromStepWorkflow - spawning a child workflow using start() inside a step
• health check endpoint - workflow and step endpoints respond to __health query parameter

🌍 Community Worlds (40 failed)

mongodb-dev (3 failed):

• dev e2e should rebuild on step change
• dev e2e should rebuild on workflow change
• dev e2e should rebuild on adding workflow file

mongodb (27 failed):

• addTenWorkflow
• addTenWorkflow
• should work with react rendering in step
• promiseAllWorkflow
• promiseRaceWorkflow
• promiseAnyWorkflow
• readableStreamWorkflow
• hookWorkflow
• webhookWorkflow
• webhook route with invalid token
• sleepingWorkflow
• nullByteWorkflow
• workflowAndStepMetadataWorkflow
• outputStreamWorkflow
• outputStreamInsideStepWorkflow - getWritable() called inside step functions
• fetchWorkflow
• promiseRaceStressTestWorkflow
• retryAttemptCounterWorkflow
• retryableAndFatalErrorWorkflow
• stepDirectCallWorkflow - calling step functions directly outside workflow context
• crossFileErrorWorkflow - stack traces work across imported modules
• hookCleanupTestWorkflow - hook token reuse after workflow completion
• stepFunctionPassingWorkflow - step function references can be passed as arguments (without closure vars)
• stepFunctionWithClosureWorkflow - step function with closure variables passed as argument
• closureVariableWorkflow - nested step functions with closure variables
• spawnWorkflowFromStepWorkflow - spawning a child workflow using start() inside a step
• health check endpoint - workflow and step endpoints respond to __health query parameter

redis (1 failed):

• webhookWorkflow

starter (8 failed):

• addTenWorkflow
• addTenWorkflow
• retryAttemptCounterWorkflow
• crossFileErrorWorkflow - stack traces work across imported modules
• hookCleanupTestWorkflow - hook token reuse after workflow completion
• stepFunctionPassingWorkflow - step function references can be passed as arguments (without closure vars)
• stepFunctionWithClosureWorkflow - step function with closure variables passed as argument
• spawnWorkflowFromStepWorkflow - spawning a child workflow using start() inside a step

turso (1 failed):

• webhookWorkflow

Details by Category

✅ ▲ Vercel Production

App	Passed	Failed	Skipped
✅ astro	26	0	1
✅ example	26	0	1
✅ express	26	0	1
✅ fastify	26	0	1
✅ hono	26	0	1
✅ nextjs-turbopack	26	0	1
✅ nextjs-webpack	26	0	1
✅ nitro	26	0	1
✅ nuxt	26	0	1
✅ sveltekit	26	0	1
✅ vite	26	0	1

❌ 💻 Local Development

App	Passed	Failed	Skipped
✅ astro-stable	26	0	1
✅ express-stable	26	0	1
✅ fastify-stable	26	0	1
✅ hono-stable	26	0	1
✅ nextjs-turbopack-stable	27	0	0
✅ nextjs-webpack-stable	27	0	0
✅ nitro-stable	26	0	1
❌ nuxt-stable	0	26	1
✅ sveltekit-stable	26	0	1
✅ vite-stable	26	0	1

✅ 📦 Local Production

App	Passed	Failed	Skipped
✅ astro-stable	26	0	1
✅ express-stable	26	0	1
✅ fastify-stable	26	0	1
✅ hono-stable	26	0	1
✅ nextjs-turbopack-stable	27	0	0
✅ nextjs-webpack-stable	27	0	0
✅ nitro-stable	26	0	1
✅ nuxt-stable	26	0	1
✅ sveltekit-stable	26	0	1
✅ vite-stable	26	0	1

✅ 🐘 Local Postgres

App	Passed	Failed	Skipped
✅ astro-stable	26	0	1
✅ express-stable	26	0	1
✅ fastify-stable	26	0	1
✅ hono-stable	26	0	1
✅ nextjs-turbopack-stable	27	0	0
✅ nextjs-webpack-stable	27	0	0
✅ nitro-stable	26	0	1
✅ nuxt-stable	26	0	1
✅ sveltekit-stable	26	0	1
✅ vite-stable	26	0	1

❌ 🪟 Windows

App	Passed	Failed	Skipped
❌ nextjs-turbopack	0	27	0

❌ 🌍 Community Worlds

App	Passed	Failed	Skipped
❌ mongodb-dev	0	3	0
❌ mongodb	0	27	0
✅ redis-dev	3	0	0
❌ redis	26	1	0
✅ starter-dev	3	0	0
❌ starter	19	8	0
✅ turso-dev	3	0	0
❌ turso	26	1	0

---

📋 View full workflow run

---

❌ Some E2E test jobs failed:

• Vercel Prod: success
• Local Dev: failure
• Local Prod: success
• Local Postgres: success
• Windows: success

Check the workflow run for details.

[github-actions]

📊 Benchmark Results

📈 Comparing against baseline from main branch. Green 🟢 = faster, Red 🔺 = slower.

workflow with no steps

💻 Local Development

World	Framework	Workflow Time	Wall Time	Overhead	Samples	vs Fastest
💻 Local	🥇 Next.js (Turbopack)	0.031s (-18.0% 🟢)	1.015s (~)	0.984s	10	1.00x
🌐 Starter	Next.js (Turbopack)	0.036s (+0.6%)	1.013s (~)	0.977s	10	1.17x
🌐 Redis	Next.js (Turbopack)	0.038s (-5.2% 🟢)	1.017s (~)	0.979s	10	1.24x
💻 Local	Nitro	0.043s (~)	1.008s (~)	0.964s	10	1.40x
💻 Local	Express	0.046s (+6.9% 🔺)	1.008s (~)	0.961s	10	1.50x
🌐 Turso	Next.js (Turbopack)	0.049s (-38.7% 🟢)	1.013s (~)	0.964s	10	1.59x
🌐 MongoDB	Next.js (Turbopack)	0.123s (+138.1% 🔺)	1.016s (~)	0.893s	10	3.97x
🐘 Postgres	Next.js (Turbopack)	0.290s (-18.3% 🟢)	1.021s (~)	0.730s	10	9.39x
🐘 Postgres	Nitro	0.304s (+1.8%)	1.012s (~)	0.709s	10	9.83x
🐘 Postgres	Express	0.326s (+11.1% 🔺)	1.014s (-0.6%)	0.688s	10	10.54x

▲ Production (Vercel)

World	Framework	Workflow Time	Wall Time	Overhead	Samples	vs Fastest
▲ Vercel	🥇 Nitro	0.545s (-7.2% 🟢)	1.667s (+12.0% 🔺)	1.122s	10	1.00x
▲ Vercel	Next.js (Turbopack)	0.559s (+4.6%)	1.397s (-13.4% 🟢)	0.839s	10	1.03x
▲ Vercel	Express	0.588s (+19.2% 🔺)	1.477s (+7.5% 🔺)	0.889s	10	1.08x

🔍 Observability: Nitro | Next.js (Turbopack) | Express

workflow with 1 step

💻 Local Development

World	Framework	Workflow Time	Wall Time	Overhead	Samples	vs Fastest
💻 Local	🥇 Next.js (Turbopack)	1.075s (-1.7%)	2.012s (~)	0.937s	10	1.00x
🌐 Starter	Next.js (Turbopack)	1.081s (~)	2.011s (~)	0.929s	10	1.01x
🌐 Redis	Next.js (Turbopack)	1.098s (~)	2.013s (~)	0.915s	10	1.02x
💻 Local	Nitro	1.114s (~)	2.006s (~)	0.891s	10	1.04x
💻 Local	Express	1.118s (~)	2.008s (~)	0.890s	10	1.04x
🌐 Turso	Next.js (Turbopack)	1.278s (-0.7%)	2.012s (~)	0.734s	10	1.19x
🌐 MongoDB	Next.js (Turbopack)	1.286s (-0.6%)	2.014s (~)	0.728s	10	1.20x
🐘 Postgres	Nitro	1.820s (-15.6% 🟢)	2.312s (-23.3% 🟢)	0.492s	10	1.69x
🐘 Postgres	Next.js (Turbopack)	1.855s (-20.5% 🟢)	2.017s (-33.1% 🟢)	0.162s	10	1.73x
🐘 Postgres	Express	2.160s (~)	3.015s (~)	0.855s	10	2.01x

▲ Production (Vercel)

World	Framework	Workflow Time	Wall Time	Overhead	Samples	vs Fastest
▲ Vercel	🥇 Next.js (Turbopack)	2.699s (+0.8%)	3.643s (-1.1%)	0.944s	10	1.00x
▲ Vercel	Nitro	2.707s (+8.7% 🔺)	3.680s (+1.7%)	0.974s	10	1.00x
▲ Vercel	Express	2.843s (+5.2% 🔺)	3.811s (+5.8% 🔺)	0.968s	10	1.05x

🔍 Observability: Next.js (Turbopack) | Nitro | Express

workflow with 10 sequential steps

💻 Local Development

World	Framework	Workflow Time	Wall Time	Overhead	Samples	vs Fastest
💻 Local	🥇 Next.js (Turbopack)	10.523s (-1.1%)	11.016s (~)	0.493s	5	1.00x
🌐 Starter	Next.js (Turbopack)	10.598s (~)	11.012s (~)	0.414s	5	1.01x
🌐 Redis	Next.js (Turbopack)	10.673s (~)	11.018s (~)	0.346s	5	1.01x
💻 Local	Nitro	10.789s (~)	11.012s (~)	0.224s	5	1.03x
💻 Local	Express	10.810s (~)	11.017s (~)	0.207s	5	1.03x
🌐 MongoDB	Next.js (Turbopack)	11.921s (-2.2%)	12.428s (-4.5%)	0.507s	5	1.13x
🌐 Turso	Next.js (Turbopack)	12.183s (~)	13.023s (~)	0.840s	5	1.16x
🐘 Postgres	Next.js (Turbopack)	15.190s (-13.5% 🟢)	16.039s (-12.1% 🟢)	0.848s	5	1.44x
🐘 Postgres	Nitro	15.251s (-25.5% 🟢)	16.027s (-23.8% 🟢)	0.776s	5	1.45x
🐘 Postgres	Express	20.426s (~)	21.028s (~)	0.602s	5	1.94x

▲ Production (Vercel)

World	Framework	Workflow Time	Wall Time	Overhead	Samples	vs Fastest
▲ Vercel	🥇 Nitro	21.507s (+1.3%)	22.528s (+2.4%)	1.021s	5	1.00x
▲ Vercel	Next.js (Turbopack)	21.614s (~)	22.343s (-0.7%)	0.730s	5	1.00x
▲ Vercel	Express	22.161s (+4.2%)	23.050s (+4.9%)	0.889s	5	1.03x

🔍 Observability: Nitro | Next.js (Turbopack) | Express

Promise.all with 10 concurrent steps

💻 Local Development

World	Framework	Workflow Time	Wall Time	Overhead	Samples	vs Fastest
💻 Local	🥇 Next.js (Turbopack)	1.335s (-4.8%)	2.012s (~)	0.677s	15	1.00x
🌐 Starter	Next.js (Turbopack)	1.345s (+0.6%)	2.008s (~)	0.663s	15	1.01x
🌐 Redis	Next.js (Turbopack)	1.363s (-0.6%)	2.010s (~)	0.647s	15	1.02x
💻 Local	Nitro	1.411s (~)	2.005s (~)	0.593s	15	1.06x
💻 Local	Express	1.428s (+1.1%)	2.007s (~)	0.578s	15	1.07x
🐘 Postgres	Nitro	1.924s (-19.0% 🟢)	2.078s (-31.0% 🟢)	0.154s	15	1.44x
🌐 Turso	Next.js (Turbopack)	2.115s (~)	3.016s (~)	0.901s	10	1.58x
🌐 MongoDB	Next.js (Turbopack)	2.133s (-1.2%)	3.014s (~)	0.881s	10	1.60x
🐘 Postgres	Next.js (Turbopack)	2.199s (+12.1% 🔺)	2.597s (+24.9% 🔺)	0.399s	12	1.65x
🐘 Postgres	Express	2.473s (+4.3%)	3.013s (~)	0.539s	10	1.85x

▲ Production (Vercel)

World	Framework	Workflow Time	Wall Time	Overhead	Samples	vs Fastest
▲ Vercel	🥇 Nitro	2.863s (+1.5%)	3.926s (+2.2%)	1.063s	8	1.00x
▲ Vercel	Next.js (Turbopack)	3.116s (+5.9% 🔺)	3.779s (-3.5%)	0.663s	8	1.09x
▲ Vercel	Express	3.295s (+22.6% 🔺)	4.156s (+15.3% 🔺)	0.861s	8	1.15x

🔍 Observability: Nitro | Next.js (Turbopack) | Express

Promise.all with 25 concurrent steps

💻 Local Development

World	Framework	Workflow Time	Wall Time	Overhead	Samples	vs Fastest
💻 Local	🥇 Next.js (Turbopack)	2.036s (-0.8%)	2.769s (-4.7%)	0.733s	11	1.00x
💻 Local	Nitro	2.222s (-1.1%)	3.150s (-1.3%)	0.928s	10	1.09x
💻 Local	Express	2.320s (+3.6%)	3.219s (+1.2%)	0.899s	10	1.14x
🌐 Starter	Next.js (Turbopack)	2.463s (~)	3.008s (~)	0.545s	10	1.21x
🌐 Redis	Next.js (Turbopack)	2.507s (+0.6%)	3.013s (~)	0.506s	10	1.23x
🐘 Postgres	Nitro	2.650s (-9.5% 🟢)	3.011s (-9.3% 🟢)	0.362s	10	1.30x
🐘 Postgres	Next.js (Turbopack)	2.650s (-0.6%)	3.014s (~)	0.364s	10	1.30x
🐘 Postgres	Express	2.842s (-7.1% 🟢)	3.011s (-18.6% 🟢)	0.169s	10	1.40x
🌐 MongoDB	Next.js (Turbopack)	4.680s (+2.3%)	5.182s (~)	0.502s	6	2.30x
🌐 Turso	Next.js (Turbopack)	4.709s (+1.7%)	5.185s (~)	0.476s	6	2.31x

▲ Production (Vercel)

World	Framework	Workflow Time	Wall Time	Overhead	Samples	vs Fastest
▲ Vercel	🥇 Express	3.074s (-7.4% 🟢)	3.726s (-5.5% 🟢)	0.652s	9	1.00x
▲ Vercel	Nitro	3.320s (-7.5% 🟢)	3.837s (-9.1% 🟢)	0.517s	8	1.08x
▲ Vercel	Next.js (Turbopack)	3.490s (-6.7% 🟢)	4.287s (-1.0%)	0.797s	7	1.14x

🔍 Observability: Express | Nitro | Next.js (Turbopack)

Promise.race with 10 concurrent steps

💻 Local Development

World	Framework	Workflow Time	Wall Time	Overhead	Samples	vs Fastest
💻 Local	🥇 Next.js (Turbopack)	1.359s (-1.3%)	2.012s (~)	0.654s	15	1.00x
🌐 Starter	Next.js (Turbopack)	1.359s (-0.9%)	2.007s (~)	0.648s	15	1.00x
🌐 Redis	Next.js (Turbopack)	1.367s (~)	2.009s (~)	0.642s	15	1.01x
💻 Local	Nitro	1.447s (+2.6%)	2.005s (~)	0.557s	15	1.07x
💻 Local	Express	1.450s (+1.5%)	2.006s (~)	0.555s	15	1.07x
🐘 Postgres	Nitro	1.798s (-9.1% 🟢)	2.009s (-6.8% 🟢)	0.210s	15	1.32x
🐘 Postgres	Next.js (Turbopack)	1.832s (+4.2%)	2.012s (~)	0.180s	15	1.35x
🐘 Postgres	Express	2.031s (+7.0% 🔺)	2.522s (+21.4% 🔺)	0.492s	12	1.49x
🌐 MongoDB	Next.js (Turbopack)	2.127s (~)	3.013s (~)	0.886s	10	1.57x
🌐 Turso	Next.js (Turbopack)	2.151s (+1.3%)	3.015s (~)	0.864s	10	1.58x

▲ Production (Vercel)

World	Framework	Workflow Time	Wall Time	Overhead	Samples	vs Fastest
▲ Vercel	🥇 Nitro	2.708s (~)	3.822s (+1.3%)	1.115s	8	1.00x
▲ Vercel	Express	2.888s (+9.6% 🔺)	3.577s (+1.6%)	0.689s	9	1.07x
▲ Vercel	Next.js (Turbopack)	3.025s (+7.4% 🔺)	3.790s (-2.7%)	0.765s	8	1.12x

🔍 Observability: Nitro | Express | Next.js (Turbopack)

Promise.race with 25 concurrent steps

💻 Local Development

World	Framework	Workflow Time	Wall Time	Overhead	Samples	vs Fastest
💻 Local	🥇 Next.js (Turbopack)	2.016s (-5.7% 🟢)	2.556s (-14.2% 🟢)	0.539s	12	1.00x
💻 Local	Nitro	2.240s (-0.9%)	3.181s (-1.0%)	0.940s	10	1.11x
💻 Local	Express	2.393s (+2.8%)	3.292s (+0.7%)	0.899s	10	1.19x
🌐 Redis	Next.js (Turbopack)	2.468s (~)	3.011s (~)	0.543s	10	1.22x
🌐 Starter	Next.js (Turbopack)	2.476s (+1.2%)	3.012s (~)	0.536s	10	1.23x
🐘 Postgres	Nitro	2.625s (+1.7%)	3.017s (~)	0.392s	10	1.30x
🐘 Postgres	Next.js (Turbopack)	2.718s (+10.8% 🔺)	3.022s (~)	0.304s	10	1.35x
🐘 Postgres	Express	2.789s (+1.6%)	3.014s (~)	0.226s	10	1.38x
🌐 Turso	Next.js (Turbopack)	4.675s (-3.3%)	5.188s (-3.0%)	0.513s	6	2.32x
🌐 MongoDB	Next.js (Turbopack)	4.689s (-2.0%)	5.183s (~)	0.494s	6	2.33x

▲ Production (Vercel)

World	Framework	Workflow Time	Wall Time	Overhead	Samples	vs Fastest
▲ Vercel	🥇 Nitro	2.932s (-8.4% 🟢)	3.706s (-4.7%)	0.774s	9	1.00x
▲ Vercel	Next.js (Turbopack)	2.993s (-3.0%)	3.796s (-2.1%)	0.803s	9	1.02x
▲ Vercel	Express	3.069s (-4.7%)	3.698s (~)	0.629s	9	1.05x

🔍 Observability: Nitro | Next.js (Turbopack) | Express

Stream Benchmarks(includes TTFB metrics)

workflow with stream

💻 Local Development

World	Framework	Workflow Time	TTFB	Slurp	Wall Time	Overhead	Samples	vs Fastest
💻 Local	🥇 Next.js (Turbopack)	0.107s (-24.2% 🟢)	1.003s (~)	0.023s (+41.0% 🔺)	1.034s (+0.7%)	0.927s	10	1.00x
🌐 Starter	Next.js (Turbopack)	0.130s (+1.2%)	1.005s (~)	0.000s (~)	1.011s (~)	0.881s	10	1.21x
🌐 Redis	Next.js (Turbopack)	0.142s (-3.0%)	1.005s (~)	0.000s (+Infinity% 🔺)	1.014s (~)	0.871s	10	1.33x
💻 Local	Nitro	0.178s (+0.9%)	0.993s (~)	0.017s (+17.2% 🔺)	1.023s (~)	0.846s	10	1.66x
💻 Local	Express	0.184s (+3.7%)	0.992s (~)	0.016s (+5.2% 🔺)	1.024s (~)	0.839s	10	1.72x
🌐 Turso	Next.js (Turbopack)	0.464s (-9.5% 🟢)	0.978s (+4.7%)	0.000s (+Infinity% 🔺)	1.013s (~)	0.550s	10	4.33x
🌐 MongoDB	Next.js (Turbopack)	0.508s (-3.9%)	0.937s (+1.9%)	0.000s (~)	1.014s (~)	0.506s	10	4.75x
🐘 Postgres	Nitro	1.385s (-39.5% 🟢)	1.647s (-40.1% 🟢)	0.000s (-100.0% 🟢)	2.011s (-33.3% 🟢)	0.626s	10	12.95x
🐘 Postgres	Next.js (Turbopack)	1.397s (-4.1%)	1.700s (+2.2%)	0.000s (NaN%)	2.022s (~)	0.626s	10	13.05x
🐘 Postgres	Express	2.375s (+4.1%)	2.668s (-3.5%)	0.000s (+Infinity% 🔺)	3.014s (~)	0.639s	10	22.20x

▲ Production (Vercel)

World	Framework	Workflow Time	TTFB	Slurp	Wall Time	Overhead	Samples	vs Fastest
▲ Vercel	🥇 Express	2.751s (+8.0% 🔺)	3.198s (+4.1%)	0.481s (+4.3%)	4.126s (+4.5%)	1.375s	10	1.00x
▲ Vercel	Next.js (Turbopack)	2.795s (+7.8% 🔺)	3.217s (~)	0.535s (-60.0% 🟢)	4.183s (-16.4% 🟢)	1.389s	10	1.02x
▲ Vercel	Nitro	2.889s (+6.5% 🔺)	3.249s (+2.0%)	0.718s (+108.1% 🔺)	4.493s (+12.6% 🔺)	1.604s	10	1.05x

🔍 Observability: Express | Next.js (Turbopack) | Nitro

Summary

Fastest Framework by World

Winner determined by most benchmark wins

World	🥇 Fastest Framework	Wins
💻 Local	Next.js (Turbopack)	8/8
🐘 Postgres	Nitro	6/8
▲ Vercel	Nitro	5/8

Fastest World by Framework

Winner determined by most benchmark wins

Framework	🥇 Fastest World	Wins
Express	💻 Local	8/8
Next.js (Turbopack)	💻 Local	8/8
Nitro	💻 Local	8/8

Column Definitions

• Workflow Time: Runtime reported by workflow (completedAt - createdAt) - primary metric
• TTFB: Time to First Byte - time from workflow start until first stream byte received (stream benchmarks only)
• Slurp: Time from first byte to complete stream consumption (stream benchmarks only)
• Wall Time: Total testbench time (trigger workflow + poll for result)
• Overhead: Testbench overhead (Wall Time - Workflow Time)
• Samples: Number of benchmark iterations run
• vs Fastest: How much slower compared to the fastest configuration for this benchmark

Worlds:

• 💻 Local: In-memory filesystem world (local development)
• 🐘 Postgres: PostgreSQL database world (local development)
• ▲ Vercel: Vercel production/preview deployment
• 🌐 Starter: Community world (local development)
• 🌐 Turso: Community world (local development)
• 🌐 MongoDB: Community world (local development)
• 🌐 Redis: Community world (local development)
• 🌐 Jazz: Community world (local development)

---

📋 View full workflow run

[vercel-release-bot]

This PR was opened by the Changesets release GitHub action. When you're ready to do a release, you can merge this and the packages will be published to npm automatically. If you're not ready to do a release yet, that's fine, whenever you add more changesets to main, this PR will be updated.

⚠️⚠️⚠️⚠️⚠️⚠️

main is currently in pre mode so this branch has prereleases rather than normal releases. If you want to exit prereleases, run changeset pre exit on main.

⚠️⚠️⚠️⚠️⚠️⚠️

Releases

@workflow/ai@4.0.1-beta.38

Patch Changes

• #69525bfa52 Thanks @ctate! - Fix: Handle object-style finishReason for AI SDK v5/v6 compatibility

• Updated dependencies []:

  • workflow@4.0.1-beta.38

@workflow/cli@4.0.1-beta.38

Patch Changes

• #68480955e7 Thanks @VaguelySerious! - Allow opening UI without a valid local config detected, UI will show warning and watch folder

• Updated dependencies [f989613]:

  • @workflow/web@4.0.1-beta.22

@workflow/web@4.0.1-beta.22

Patch Changes

• #694f989613 Thanks @VaguelySerious! - Add error boundaries around tabs in run detail view

workflow@4.0.1-beta.38

Patch Changes

• Updated dependencies [80955e7]:
  • @workflow/cli@4.0.1-beta.38

@workflow/world-testing@4.0.1-beta.39

Patch Changes

• Updated dependencies [80955e7]:
  • @workflow/cli@4.0.1-beta.38
  • workflow@4.0.1-beta.38

[vercel]

The latest updates on your projects. Learn more about Vercel for GitHub.

Project	Deployment	Review	Updated (UTC)
example-nextjs-workflow-turbopack	Ready	Preview, Comment	Dec 28, 2025 5:03pm
example-nextjs-workflow-webpack	Ready	Preview, Comment	Dec 28, 2025 5:03pm
example-workflow	Ready	Preview, Comment	Dec 28, 2025 5:03pm
workbench-astro-workflow	Ready	Preview, Comment	Dec 28, 2025 5:03pm
workbench-express-workflow	Ready	Preview, Comment	Dec 28, 2025 5:03pm
workbench-fastify-workflow	Ready	Preview, Comment	Dec 28, 2025 5:03pm
workbench-hono-workflow	Ready	Preview, Comment	Dec 28, 2025 5:03pm
workbench-nitro-workflow	Ready	Preview, Comment	Dec 28, 2025 5:03pm
workbench-nuxt-workflow	Ready	Preview, Comment	Dec 28, 2025 5:03pm
workbench-sveltekit-workflow	Ready	Preview, Comment	Dec 28, 2025 5:03pm
workbench-vite-workflow	Ready	Preview, Comment	Dec 28, 2025 5:03pm
workflow-docs	Ready	Preview, Comment	Dec 28, 2025 5:03pm

[github-actions]

🧪 E2E Test Results

❌ Some tests failed

Summary

	Passed	Failed	Skipped	Total
✅ ▲ Vercel Production	286	0	11	297
❌ 💻 Local Development	236	26	8	270
✅ 📦 Local Production	262	0	8	270
✅ 🐘 Local Postgres	262	0	8	270
❌ 🪟 Windows	0	27	0	27
❌ 🌍 Community Worlds	80	40	0	120
Total	1126	93	35	1254

❌ Failed Tests

💻 Local Development (26 failed)

nuxt-stable (26 failed):

• addTenWorkflow
• addTenWorkflow
• promiseAllWorkflow
• promiseRaceWorkflow
• promiseAnyWorkflow
• readableStreamWorkflow
• hookWorkflow
• webhookWorkflow
• webhook route with invalid token
• sleepingWorkflow
• nullByteWorkflow
• workflowAndStepMetadataWorkflow
• outputStreamWorkflow
• outputStreamInsideStepWorkflow - getWritable() called inside step functions
• fetchWorkflow
• promiseRaceStressTestWorkflow
• retryAttemptCounterWorkflow
• retryableAndFatalErrorWorkflow
• stepDirectCallWorkflow - calling step functions directly outside workflow context
• crossFileErrorWorkflow - stack traces work across imported modules
• hookCleanupTestWorkflow - hook token reuse after workflow completion
• stepFunctionPassingWorkflow - step function references can be passed as arguments (without closure vars)
• stepFunctionWithClosureWorkflow - step function with closure variables passed as argument
• closureVariableWorkflow - nested step functions with closure variables
• spawnWorkflowFromStepWorkflow - spawning a child workflow using start() inside a step
• health check endpoint - workflow and step endpoints respond to __health query parameter

🪟 Windows (27 failed)

nextjs-turbopack (27 failed):

• addTenWorkflow
• addTenWorkflow
• should work with react rendering in step
• promiseAllWorkflow
• promiseRaceWorkflow
• promiseAnyWorkflow
• readableStreamWorkflow
• hookWorkflow
• webhookWorkflow
• webhook route with invalid token
• sleepingWorkflow
• nullByteWorkflow
• workflowAndStepMetadataWorkflow
• outputStreamWorkflow
• outputStreamInsideStepWorkflow - getWritable() called inside step functions
• fetchWorkflow
• promiseRaceStressTestWorkflow
• retryAttemptCounterWorkflow
• retryableAndFatalErrorWorkflow
• stepDirectCallWorkflow - calling step functions directly outside workflow context
• crossFileErrorWorkflow - stack traces work across imported modules
• hookCleanupTestWorkflow - hook token reuse after workflow completion
• stepFunctionPassingWorkflow - step function references can be passed as arguments (without closure vars)
• stepFunctionWithClosureWorkflow - step function with closure variables passed as argument
• closureVariableWorkflow - nested step functions with closure variables
• spawnWorkflowFromStepWorkflow - spawning a child workflow using start() inside a step
• health check endpoint - workflow and step endpoints respond to __health query parameter

🌍 Community Worlds (40 failed)

mongodb-dev (3 failed):

• dev e2e should rebuild on step change
• dev e2e should rebuild on workflow change
• dev e2e should rebuild on adding workflow file

mongodb (27 failed):

• addTenWorkflow
• addTenWorkflow
• should work with react rendering in step
• promiseAllWorkflow
• promiseRaceWorkflow
• promiseAnyWorkflow
• readableStreamWorkflow
• hookWorkflow
• webhookWorkflow
• webhook route with invalid token
• sleepingWorkflow
• nullByteWorkflow
• workflowAndStepMetadataWorkflow
• outputStreamWorkflow
• outputStreamInsideStepWorkflow - getWritable() called inside step functions
• fetchWorkflow
• promiseRaceStressTestWorkflow
• retryAttemptCounterWorkflow
• retryableAndFatalErrorWorkflow
• stepDirectCallWorkflow - calling step functions directly outside workflow context
• crossFileErrorWorkflow - stack traces work across imported modules
• hookCleanupTestWorkflow - hook token reuse after workflow completion
• stepFunctionPassingWorkflow - step function references can be passed as arguments (without closure vars)
• stepFunctionWithClosureWorkflow - step function with closure variables passed as argument
• closureVariableWorkflow - nested step functions with closure variables
• spawnWorkflowFromStepWorkflow - spawning a child workflow using start() inside a step
• health check endpoint - workflow and step endpoints respond to __health query parameter

redis (1 failed):

• webhookWorkflow

starter (8 failed):

• addTenWorkflow
• addTenWorkflow
• retryAttemptCounterWorkflow
• crossFileErrorWorkflow - stack traces work across imported modules
• hookCleanupTestWorkflow - hook token reuse after workflow completion
• stepFunctionPassingWorkflow - step function references can be passed as arguments (without closure vars)
• stepFunctionWithClosureWorkflow - step function with closure variables passed as argument
• spawnWorkflowFromStepWorkflow - spawning a child workflow using start() inside a step

turso (1 failed):

• webhookWorkflow

Details by Category

✅ ▲ Vercel Production

App	Passed	Failed	Skipped
✅ astro	26	0	1
✅ example	26	0	1
✅ express	26	0	1
✅ fastify	26	0	1
✅ hono	26	0	1
✅ nextjs-turbopack	26	0	1
✅ nextjs-webpack	26	0	1
✅ nitro	26	0	1
✅ nuxt	26	0	1
✅ sveltekit	26	0	1
✅ vite	26	0	1

❌ 💻 Local Development

App	Passed	Failed	Skipped
✅ astro-stable	26	0	1
✅ express-stable	26	0	1
✅ fastify-stable	26	0	1
✅ hono-stable	26	0	1
✅ nextjs-turbopack-stable	27	0	0
✅ nextjs-webpack-stable	27	0	0
✅ nitro-stable	26	0	1
❌ nuxt-stable	0	26	1
✅ sveltekit-stable	26	0	1
✅ vite-stable	26	0	1

✅ 📦 Local Production

App	Passed	Failed	Skipped
✅ astro-stable	26	0	1
✅ express-stable	26	0	1
✅ fastify-stable	26	0	1
✅ hono-stable	26	0	1
✅ nextjs-turbopack-stable	27	0	0
✅ nextjs-webpack-stable	27	0	0
✅ nitro-stable	26	0	1
✅ nuxt-stable	26	0	1
✅ sveltekit-stable	26	0	1
✅ vite-stable	26	0	1

✅ 🐘 Local Postgres

App	Passed	Failed	Skipped
✅ astro-stable	26	0	1
✅ express-stable	26	0	1
✅ fastify-stable	26	0	1
✅ hono-stable	26	0	1
✅ nextjs-turbopack-stable	27	0	0
✅ nextjs-webpack-stable	27	0	0
✅ nitro-stable	26	0	1
✅ nuxt-stable	26	0	1
✅ sveltekit-stable	26	0	1
✅ vite-stable	26	0	1

❌ 🪟 Windows

App	Passed	Failed	Skipped
❌ nextjs-turbopack	0	27	0

❌ 🌍 Community Worlds

App	Passed	Failed	Skipped
❌ mongodb-dev	0	3	0
❌ mongodb	0	27	0
✅ redis-dev	3	0	0
❌ redis	26	1	0
✅ starter-dev	3	0	0
❌ starter	19	8	0
✅ turso-dev	3	0	0
❌ turso	26	1	0

---

📋 View full workflow run

---

❌ Some E2E test jobs failed:

• Vercel Prod: success
• Local Dev: failure
• Local Prod: success
• Local Postgres: success
• Windows: success

Check the workflow run for details.

[github-actions]

📊 Benchmark Results

📈 Comparing against baseline from main branch. Green 🟢 = faster, Red 🔺 = slower.

workflow with no steps

💻 Local Development

World	Framework	Workflow Time	Wall Time	Overhead	Samples	vs Fastest
💻 Local	🥇 Next.js (Turbopack)	0.031s (-18.0% 🟢)	1.015s (~)	0.984s	10	1.00x
🌐 Starter	Next.js (Turbopack)	0.036s (+0.6%)	1.013s (~)	0.977s	10	1.17x
🌐 Redis	Next.js (Turbopack)	0.038s (-5.2% 🟢)	1.017s (~)	0.979s	10	1.24x
💻 Local	Nitro	0.043s (~)	1.008s (~)	0.964s	10	1.40x
💻 Local	Express	0.046s (+6.9% 🔺)	1.008s (~)	0.961s	10	1.50x
🌐 Turso	Next.js (Turbopack)	0.049s (-38.7% 🟢)	1.013s (~)	0.964s	10	1.59x
🌐 MongoDB	Next.js (Turbopack)	0.123s (+138.1% 🔺)	1.016s (~)	0.893s	10	3.97x
🐘 Postgres	Next.js (Turbopack)	0.290s (-18.3% 🟢)	1.021s (~)	0.730s	10	9.39x
🐘 Postgres	Nitro	0.304s (+1.8%)	1.012s (~)	0.709s	10	9.83x
🐘 Postgres	Express	0.326s (+11.1% 🔺)	1.014s (-0.6%)	0.688s	10	10.54x

▲ Production (Vercel)

World	Framework	Workflow Time	Wall Time	Overhead	Samples	vs Fastest
▲ Vercel	🥇 Nitro	0.545s (-7.2% 🟢)	1.667s (+12.0% 🔺)	1.122s	10	1.00x
▲ Vercel	Next.js (Turbopack)	0.559s (+4.6%)	1.397s (-13.4% 🟢)	0.839s	10	1.03x
▲ Vercel	Express	0.588s (+19.2% 🔺)	1.477s (+7.5% 🔺)	0.889s	10	1.08x

🔍 Observability: Nitro | Next.js (Turbopack) | Express

workflow with 1 step

💻 Local Development

World	Framework	Workflow Time	Wall Time	Overhead	Samples	vs Fastest
💻 Local	🥇 Next.js (Turbopack)	1.075s (-1.7%)	2.012s (~)	0.937s	10	1.00x
🌐 Starter	Next.js (Turbopack)	1.081s (~)	2.011s (~)	0.929s	10	1.01x
🌐 Redis	Next.js (Turbopack)	1.098s (~)	2.013s (~)	0.915s	10	1.02x
💻 Local	Nitro	1.114s (~)	2.006s (~)	0.891s	10	1.04x
💻 Local	Express	1.118s (~)	2.008s (~)	0.890s	10	1.04x
🌐 Turso	Next.js (Turbopack)	1.278s (-0.7%)	2.012s (~)	0.734s	10	1.19x
🌐 MongoDB	Next.js (Turbopack)	1.286s (-0.6%)	2.014s (~)	0.728s	10	1.20x
🐘 Postgres	Nitro	1.820s (-15.6% 🟢)	2.312s (-23.3% 🟢)	0.492s	10	1.69x
🐘 Postgres	Next.js (Turbopack)	1.855s (-20.5% 🟢)	2.017s (-33.1% 🟢)	0.162s	10	1.73x
🐘 Postgres	Express	2.160s (~)	3.015s (~)	0.855s	10	2.01x

▲ Production (Vercel)

World	Framework	Workflow Time	Wall Time	Overhead	Samples	vs Fastest
▲ Vercel	🥇 Next.js (Turbopack)	2.699s (+0.8%)	3.643s (-1.1%)	0.944s	10	1.00x
▲ Vercel	Nitro	2.707s (+8.7% 🔺)	3.680s (+1.7%)	0.974s	10	1.00x
▲ Vercel	Express	2.843s (+5.2% 🔺)	3.811s (+5.8% 🔺)	0.968s	10	1.05x

🔍 Observability: Next.js (Turbopack) | Nitro | Express

workflow with 10 sequential steps

💻 Local Development

World	Framework	Workflow Time	Wall Time	Overhead	Samples	vs Fastest
💻 Local	🥇 Next.js (Turbopack)	10.523s (-1.1%)	11.016s (~)	0.493s	5	1.00x
🌐 Starter	Next.js (Turbopack)	10.598s (~)	11.012s (~)	0.414s	5	1.01x
🌐 Redis	Next.js (Turbopack)	10.673s (~)	11.018s (~)	0.346s	5	1.01x
💻 Local	Nitro	10.789s (~)	11.012s (~)	0.224s	5	1.03x
💻 Local	Express	10.810s (~)	11.017s (~)	0.207s	5	1.03x
🌐 MongoDB	Next.js (Turbopack)	11.921s (-2.2%)	12.428s (-4.5%)	0.507s	5	1.13x
🌐 Turso	Next.js (Turbopack)	12.183s (~)	13.023s (~)	0.840s	5	1.16x
🐘 Postgres	Next.js (Turbopack)	15.190s (-13.5% 🟢)	16.039s (-12.1% 🟢)	0.848s	5	1.44x
🐘 Postgres	Nitro	15.251s (-25.5% 🟢)	16.027s (-23.8% 🟢)	0.776s	5	1.45x
🐘 Postgres	Express	20.426s (~)	21.028s (~)	0.602s	5	1.94x

▲ Production (Vercel)

World	Framework	Workflow Time	Wall Time	Overhead	Samples	vs Fastest
▲ Vercel	🥇 Nitro	21.507s (+1.3%)	22.528s (+2.4%)	1.021s	5	1.00x
▲ Vercel	Next.js (Turbopack)	21.614s (~)	22.343s (-0.7%)	0.730s	5	1.00x
▲ Vercel	Express	22.161s (+4.2%)	23.050s (+4.9%)	0.889s	5	1.03x

🔍 Observability: Nitro | Next.js (Turbopack) | Express

Promise.all with 10 concurrent steps

💻 Local Development

World	Framework	Workflow Time	Wall Time	Overhead	Samples	vs Fastest
💻 Local	🥇 Next.js (Turbopack)	1.335s (-4.8%)	2.012s (~)	0.677s	15	1.00x
🌐 Starter	Next.js (Turbopack)	1.345s (+0.6%)	2.008s (~)	0.663s	15	1.01x
🌐 Redis	Next.js (Turbopack)	1.363s (-0.6%)	2.010s (~)	0.647s	15	1.02x
💻 Local	Nitro	1.411s (~)	2.005s (~)	0.593s	15	1.06x
💻 Local	Express	1.428s (+1.1%)	2.007s (~)	0.578s	15	1.07x
🐘 Postgres	Nitro	1.924s (-19.0% 🟢)	2.078s (-31.0% 🟢)	0.154s	15	1.44x
🌐 Turso	Next.js (Turbopack)	2.115s (~)	3.016s (~)	0.901s	10	1.58x
🌐 MongoDB	Next.js (Turbopack)	2.133s (-1.2%)	3.014s (~)	0.881s	10	1.60x
🐘 Postgres	Next.js (Turbopack)	2.199s (+12.1% 🔺)	2.597s (+24.9% 🔺)	0.399s	12	1.65x
🐘 Postgres	Express	2.473s (+4.3%)	3.013s (~)	0.539s	10	1.85x

▲ Production (Vercel)

World	Framework	Workflow Time	Wall Time	Overhead	Samples	vs Fastest
▲ Vercel	🥇 Nitro	2.863s (+1.5%)	3.926s (+2.2%)	1.063s	8	1.00x
▲ Vercel	Next.js (Turbopack)	3.116s (+5.9% 🔺)	3.779s (-3.5%)	0.663s	8	1.09x
▲ Vercel	Express	3.295s (+22.6% 🔺)	4.156s (+15.3% 🔺)	0.861s	8	1.15x

🔍 Observability: Nitro | Next.js (Turbopack) | Express

Promise.all with 25 concurrent steps

💻 Local Development

World	Framework	Workflow Time	Wall Time	Overhead	Samples	vs Fastest
💻 Local	🥇 Next.js (Turbopack)	2.036s (-0.8%)	2.769s (-4.7%)	0.733s	11	1.00x
💻 Local	Nitro	2.222s (-1.1%)	3.150s (-1.3%)	0.928s	10	1.09x
💻 Local	Express	2.320s (+3.6%)	3.219s (+1.2%)	0.899s	10	1.14x
🌐 Starter	Next.js (Turbopack)	2.463s (~)	3.008s (~)	0.545s	10	1.21x
🌐 Redis	Next.js (Turbopack)	2.507s (+0.6%)	3.013s (~)	0.506s	10	1.23x
🐘 Postgres	Nitro	2.650s (-9.5% 🟢)	3.011s (-9.3% 🟢)	0.362s	10	1.30x
🐘 Postgres	Next.js (Turbopack)	2.650s (-0.6%)	3.014s (~)	0.364s	10	1.30x
🐘 Postgres	Express	2.842s (-7.1% 🟢)	3.011s (-18.6% 🟢)	0.169s	10	1.40x
🌐 MongoDB	Next.js (Turbopack)	4.680s (+2.3%)	5.182s (~)	0.502s	6	2.30x
🌐 Turso	Next.js (Turbopack)	4.709s (+1.7%)	5.185s (~)	0.476s	6	2.31x

▲ Production (Vercel)

World	Framework	Workflow Time	Wall Time	Overhead	Samples	vs Fastest
▲ Vercel	🥇 Express	3.074s (-7.4% 🟢)	3.726s (-5.5% 🟢)	0.652s	9	1.00x
▲ Vercel	Nitro	3.320s (-7.5% 🟢)	3.837s (-9.1% 🟢)	0.517s	8	1.08x
▲ Vercel	Next.js (Turbopack)	3.490s (-6.7% 🟢)	4.287s (-1.0%)	0.797s	7	1.14x

🔍 Observability: Express | Nitro | Next.js (Turbopack)

Promise.race with 10 concurrent steps

💻 Local Development

World	Framework	Workflow Time	Wall Time	Overhead	Samples	vs Fastest
💻 Local	🥇 Next.js (Turbopack)	1.359s (-1.3%)	2.012s (~)	0.654s	15	1.00x
🌐 Starter	Next.js (Turbopack)	1.359s (-0.9%)	2.007s (~)	0.648s	15	1.00x
🌐 Redis	Next.js (Turbopack)	1.367s (~)	2.009s (~)	0.642s	15	1.01x
💻 Local	Nitro	1.447s (+2.6%)	2.005s (~)	0.557s	15	1.07x
💻 Local	Express	1.450s (+1.5%)	2.006s (~)	0.555s	15	1.07x
🐘 Postgres	Nitro	1.798s (-9.1% 🟢)	2.009s (-6.8% 🟢)	0.210s	15	1.32x
🐘 Postgres	Next.js (Turbopack)	1.832s (+4.2%)	2.012s (~)	0.180s	15	1.35x
🐘 Postgres	Express	2.031s (+7.0% 🔺)	2.522s (+21.4% 🔺)	0.492s	12	1.49x
🌐 MongoDB	Next.js (Turbopack)	2.127s (~)	3.013s (~)	0.886s	10	1.57x
🌐 Turso	Next.js (Turbopack)	2.151s (+1.3%)	3.015s (~)	0.864s	10	1.58x

▲ Production (Vercel)

World	Framework	Workflow Time	Wall Time	Overhead	Samples	vs Fastest
▲ Vercel	🥇 Nitro	2.708s (~)	3.822s (+1.3%)	1.115s	8	1.00x
▲ Vercel	Express	2.888s (+9.6% 🔺)	3.577s (+1.6%)	0.689s	9	1.07x
▲ Vercel	Next.js (Turbopack)	3.025s (+7.4% 🔺)	3.790s (-2.7%)	0.765s	8	1.12x

🔍 Observability: Nitro | Express | Next.js (Turbopack)

Promise.race with 25 concurrent steps

💻 Local Development

World	Framework	Workflow Time	Wall Time	Overhead	Samples	vs Fastest
💻 Local	🥇 Next.js (Turbopack)	2.016s (-5.7% 🟢)	2.556s (-14.2% 🟢)	0.539s	12	1.00x
💻 Local	Nitro	2.240s (-0.9%)	3.181s (-1.0%)	0.940s	10	1.11x
💻 Local	Express	2.393s (+2.8%)	3.292s (+0.7%)	0.899s	10	1.19x
🌐 Redis	Next.js (Turbopack)	2.468s (~)	3.011s (~)	0.543s	10	1.22x
🌐 Starter	Next.js (Turbopack)	2.476s (+1.2%)	3.012s (~)	0.536s	10	1.23x
🐘 Postgres	Nitro	2.625s (+1.7%)	3.017s (~)	0.392s	10	1.30x
🐘 Postgres	Next.js (Turbopack)	2.718s (+10.8% 🔺)	3.022s (~)	0.304s	10	1.35x
🐘 Postgres	Express	2.789s (+1.6%)	3.014s (~)	0.226s	10	1.38x
🌐 Turso	Next.js (Turbopack)	4.675s (-3.3%)	5.188s (-3.0%)	0.513s	6	2.32x
🌐 MongoDB	Next.js (Turbopack)	4.689s (-2.0%)	5.183s (~)	0.494s	6	2.33x

▲ Production (Vercel)

World	Framework	Workflow Time	Wall Time	Overhead	Samples	vs Fastest
▲ Vercel	🥇 Nitro	2.932s (-8.4% 🟢)	3.706s (-4.7%)	0.774s	9	1.00x
▲ Vercel	Next.js (Turbopack)	2.993s (-3.0%)	3.796s (-2.1%)	0.803s	9	1.02x
▲ Vercel	Express	3.069s (-4.7%)	3.698s (~)	0.629s	9	1.05x

🔍 Observability: Nitro | Next.js (Turbopack) | Express

Stream Benchmarks(includes TTFB metrics)

workflow with stream

💻 Local Development

World	Framework	Workflow Time	TTFB	Slurp	Wall Time	Overhead	Samples	vs Fastest
💻 Local	🥇 Next.js (Turbopack)	0.107s (-24.2% 🟢)	1.003s (~)	0.023s (+41.0% 🔺)	1.034s (+0.7%)	0.927s	10	1.00x
🌐 Starter	Next.js (Turbopack)	0.130s (+1.2%)	1.005s (~)	0.000s (~)	1.011s (~)	0.881s	10	1.21x
🌐 Redis	Next.js (Turbopack)	0.142s (-3.0%)	1.005s (~)	0.000s (+Infinity% 🔺)	1.014s (~)	0.871s	10	1.33x
💻 Local	Nitro	0.178s (+0.9%)	0.993s (~)	0.017s (+17.2% 🔺)	1.023s (~)	0.846s	10	1.66x
💻 Local	Express	0.184s (+3.7%)	0.992s (~)	0.016s (+5.2% 🔺)	1.024s (~)	0.839s	10	1.72x
🌐 Turso	Next.js (Turbopack)	0.464s (-9.5% 🟢)	0.978s (+4.7%)	0.000s (+Infinity% 🔺)	1.013s (~)	0.550s	10	4.33x
🌐 MongoDB	Next.js (Turbopack)	0.508s (-3.9%)	0.937s (+1.9%)	0.000s (~)	1.014s (~)	0.506s	10	4.75x
🐘 Postgres	Nitro	1.385s (-39.5% 🟢)	1.647s (-40.1% 🟢)	0.000s (-100.0% 🟢)	2.011s (-33.3% 🟢)	0.626s	10	12.95x
🐘 Postgres	Next.js (Turbopack)	1.397s (-4.1%)	1.700s (+2.2%)	0.000s (NaN%)	2.022s (~)	0.626s	10	13.05x
🐘 Postgres	Express	2.375s (+4.1%)	2.668s (-3.5%)	0.000s (+Infinity% 🔺)	3.014s (~)	0.639s	10	22.20x

▲ Production (Vercel)

World	Framework	Workflow Time	TTFB	Slurp	Wall Time	Overhead	Samples	vs Fastest
▲ Vercel	🥇 Express	2.751s (+8.0% 🔺)	3.198s (+4.1%)	0.481s (+4.3%)	4.126s (+4.5%)	1.375s	10	1.00x
▲ Vercel	Next.js (Turbopack)	2.795s (+7.8% 🔺)	3.217s (~)	0.535s (-60.0% 🟢)	4.183s (-16.4% 🟢)	1.389s	10	1.02x
▲ Vercel	Nitro	2.889s (+6.5% 🔺)	3.249s (+2.0%)	0.718s (+108.1% 🔺)	4.493s (+12.6% 🔺)	1.604s	10	1.05x

🔍 Observability: Express | Next.js (Turbopack) | Nitro

Summary

Fastest Framework by World

Winner determined by most benchmark wins

World	🥇 Fastest Framework	Wins
💻 Local	Next.js (Turbopack)	8/8
🐘 Postgres	Nitro	6/8
▲ Vercel	Nitro	5/8

Fastest World by Framework

Winner determined by most benchmark wins

Framework	🥇 Fastest World	Wins
Express	💻 Local	8/8
Next.js (Turbopack)	💻 Local	8/8
Nitro	💻 Local	8/8

Column Definitions

• Workflow Time: Runtime reported by workflow (completedAt - createdAt) - primary metric
• TTFB: Time to First Byte - time from workflow start until first stream byte received (stream benchmarks only)
• Slurp: Time from first byte to complete stream consumption (stream benchmarks only)
• Wall Time: Total testbench time (trigger workflow + poll for result)
• Overhead: Testbench overhead (Wall Time - Workflow Time)
• Samples: Number of benchmark iterations run
• vs Fastest: How much slower compared to the fastest configuration for this benchmark

Worlds:

• 💻 Local: In-memory filesystem world (local development)
• 🐘 Postgres: PostgreSQL database world (local development)
• ▲ Vercel: Vercel production/preview deployment
• 🌐 Starter: Community world (local development)
• 🌐 Turso: Community world (local development)
• 🌐 MongoDB: Community world (local development)
• 🌐 Redis: Community world (local development)
• 🌐 Jazz: Community world (local development)

---

📋 View full workflow run

[vercel-release-bot]

This PR was opened by the Changesets release GitHub action. When you're ready to do a release, you can merge this and the packages will be published to npm automatically. If you're not ready to do a release yet, that's fine, whenever you add more changesets to main, this PR will be updated.

⚠️⚠️⚠️⚠️⚠️⚠️

main is currently in pre mode so this branch has prereleases rather than normal releases. If you want to exit prereleases, run changeset pre exit on main.

⚠️⚠️⚠️⚠️⚠️⚠️

Releases

@workflow/ai@4.0.1-beta.38

Patch Changes

• #69525bfa52 Thanks @ctate! - Fix: Handle object-style finishReason for AI SDK v5/v6 compatibility

• Updated dependencies []:

  • workflow@4.0.1-beta.38

@workflow/cli@4.0.1-beta.38

Patch Changes

• #68480955e7 Thanks @VaguelySerious! - Allow opening UI without a valid local config detected, UI will show warning and watch folder

• Updated dependencies [f989613]:

  • @workflow/web@4.0.1-beta.22

@workflow/web@4.0.1-beta.22

Patch Changes

• #694f989613 Thanks @VaguelySerious! - Add error boundaries around tabs in run detail view

workflow@4.0.1-beta.38

Patch Changes

• Updated dependencies [80955e7]:
  • @workflow/cli@4.0.1-beta.38

@workflow/world-testing@4.0.1-beta.39

Patch Changes

• Updated dependencies [80955e7]:
  • @workflow/cli@4.0.1-beta.38
  • workflow@4.0.1-beta.38

[vercel]

The latest updates on your projects. Learn more about Vercel for GitHub.

Project	Deployment	Review	Updated (UTC)
example-nextjs-workflow-turbopack	Ready	Preview, Comment	Dec 28, 2025 5:03pm
example-nextjs-workflow-webpack	Ready	Preview, Comment	Dec 28, 2025 5:03pm
example-workflow	Ready	Preview, Comment	Dec 28, 2025 5:03pm
workbench-astro-workflow	Ready	Preview, Comment	Dec 28, 2025 5:03pm
workbench-express-workflow	Ready	Preview, Comment	Dec 28, 2025 5:03pm
workbench-fastify-workflow	Ready	Preview, Comment	Dec 28, 2025 5:03pm
workbench-hono-workflow	Ready	Preview, Comment	Dec 28, 2025 5:03pm
workbench-nitro-workflow	Ready	Preview, Comment	Dec 28, 2025 5:03pm
workbench-nuxt-workflow	Ready	Preview, Comment	Dec 28, 2025 5:03pm
workbench-sveltekit-workflow	Ready	Preview, Comment	Dec 28, 2025 5:03pm
workbench-vite-workflow	Ready	Preview, Comment	Dec 28, 2025 5:03pm
workflow-docs	Ready	Preview, Comment	Dec 28, 2025 5:03pm

[github-actions]

🧪 E2E Test Results

❌ Some tests failed

Summary

	Passed	Failed	Skipped	Total
✅ ▲ Vercel Production	286	0	11	297
❌ 💻 Local Development	236	26	8	270
✅ 📦 Local Production	262	0	8	270
✅ 🐘 Local Postgres	262	0	8	270
❌ 🪟 Windows	0	27	0	27
❌ 🌍 Community Worlds	80	40	0	120
Total	1126	93	35	1254

❌ Failed Tests

💻 Local Development (26 failed)

nuxt-stable (26 failed):

• addTenWorkflow
• addTenWorkflow
• promiseAllWorkflow
• promiseRaceWorkflow
• promiseAnyWorkflow
• readableStreamWorkflow
• hookWorkflow
• webhookWorkflow
• webhook route with invalid token
• sleepingWorkflow
• nullByteWorkflow
• workflowAndStepMetadataWorkflow
• outputStreamWorkflow
• outputStreamInsideStepWorkflow - getWritable() called inside step functions
• fetchWorkflow
• promiseRaceStressTestWorkflow
• retryAttemptCounterWorkflow
• retryableAndFatalErrorWorkflow
• stepDirectCallWorkflow - calling step functions directly outside workflow context
• crossFileErrorWorkflow - stack traces work across imported modules
• hookCleanupTestWorkflow - hook token reuse after workflow completion
• stepFunctionPassingWorkflow - step function references can be passed as arguments (without closure vars)
• stepFunctionWithClosureWorkflow - step function with closure variables passed as argument
• closureVariableWorkflow - nested step functions with closure variables
• spawnWorkflowFromStepWorkflow - spawning a child workflow using start() inside a step
• health check endpoint - workflow and step endpoints respond to __health query parameter

🪟 Windows (27 failed)

nextjs-turbopack (27 failed):

• addTenWorkflow
• addTenWorkflow
• should work with react rendering in step
• promiseAllWorkflow
• promiseRaceWorkflow
• promiseAnyWorkflow
• readableStreamWorkflow
• hookWorkflow
• webhookWorkflow
• webhook route with invalid token
• sleepingWorkflow
• nullByteWorkflow
• workflowAndStepMetadataWorkflow
• outputStreamWorkflow
• outputStreamInsideStepWorkflow - getWritable() called inside step functions
• fetchWorkflow
• promiseRaceStressTestWorkflow
• retryAttemptCounterWorkflow
• retryableAndFatalErrorWorkflow
• stepDirectCallWorkflow - calling step functions directly outside workflow context
• crossFileErrorWorkflow - stack traces work across imported modules
• hookCleanupTestWorkflow - hook token reuse after workflow completion
• stepFunctionPassingWorkflow - step function references can be passed as arguments (without closure vars)
• stepFunctionWithClosureWorkflow - step function with closure variables passed as argument
• closureVariableWorkflow - nested step functions with closure variables
• spawnWorkflowFromStepWorkflow - spawning a child workflow using start() inside a step
• health check endpoint - workflow and step endpoints respond to __health query parameter

🌍 Community Worlds (40 failed)

mongodb-dev (3 failed):

• dev e2e should rebuild on step change
• dev e2e should rebuild on workflow change
• dev e2e should rebuild on adding workflow file

mongodb (27 failed):

• addTenWorkflow
• addTenWorkflow
• should work with react rendering in step
• promiseAllWorkflow
• promiseRaceWorkflow
• promiseAnyWorkflow
• readableStreamWorkflow
• hookWorkflow
• webhookWorkflow
• webhook route with invalid token
• sleepingWorkflow
• nullByteWorkflow
• workflowAndStepMetadataWorkflow
• outputStreamWorkflow
• outputStreamInsideStepWorkflow - getWritable() called inside step functions
• fetchWorkflow
• promiseRaceStressTestWorkflow
• retryAttemptCounterWorkflow
• retryableAndFatalErrorWorkflow
• stepDirectCallWorkflow - calling step functions directly outside workflow context
• crossFileErrorWorkflow - stack traces work across imported modules
• hookCleanupTestWorkflow - hook token reuse after workflow completion
• stepFunctionPassingWorkflow - step function references can be passed as arguments (without closure vars)
• stepFunctionWithClosureWorkflow - step function with closure variables passed as argument
• closureVariableWorkflow - nested step functions with closure variables
• spawnWorkflowFromStepWorkflow - spawning a child workflow using start() inside a step
• health check endpoint - workflow and step endpoints respond to __health query parameter

redis (1 failed):

• webhookWorkflow

starter (8 failed):

• addTenWorkflow
• addTenWorkflow
• retryAttemptCounterWorkflow
• crossFileErrorWorkflow - stack traces work across imported modules
• hookCleanupTestWorkflow - hook token reuse after workflow completion
• stepFunctionPassingWorkflow - step function references can be passed as arguments (without closure vars)
• stepFunctionWithClosureWorkflow - step function with closure variables passed as argument
• spawnWorkflowFromStepWorkflow - spawning a child workflow using start() inside a step

turso (1 failed):

• webhookWorkflow

Details by Category

✅ ▲ Vercel Production

App	Passed	Failed	Skipped
✅ astro	26	0	1
✅ example	26	0	1
✅ express	26	0	1
✅ fastify	26	0	1
✅ hono	26	0	1
✅ nextjs-turbopack	26	0	1
✅ nextjs-webpack	26	0	1
✅ nitro	26	0	1
✅ nuxt	26	0	1
✅ sveltekit	26	0	1
✅ vite	26	0	1

❌ 💻 Local Development

App	Passed	Failed	Skipped
✅ astro-stable	26	0	1
✅ express-stable	26	0	1
✅ fastify-stable	26	0	1
✅ hono-stable	26	0	1
✅ nextjs-turbopack-stable	27	0	0
✅ nextjs-webpack-stable	27	0	0
✅ nitro-stable	26	0	1
❌ nuxt-stable	0	26	1
✅ sveltekit-stable	26	0	1
✅ vite-stable	26	0	1

✅ 📦 Local Production

App	Passed	Failed	Skipped
✅ astro-stable	26	0	1
✅ express-stable	26	0	1
✅ fastify-stable	26	0	1
✅ hono-stable	26	0	1
✅ nextjs-turbopack-stable	27	0	0
✅ nextjs-webpack-stable	27	0	0
✅ nitro-stable	26	0	1
✅ nuxt-stable	26	0	1
✅ sveltekit-stable	26	0	1
✅ vite-stable	26	0	1

✅ 🐘 Local Postgres

App	Passed	Failed	Skipped
✅ astro-stable	26	0	1
✅ express-stable	26	0	1
✅ fastify-stable	26	0	1
✅ hono-stable	26	0	1
✅ nextjs-turbopack-stable	27	0	0
✅ nextjs-webpack-stable	27	0	0
✅ nitro-stable	26	0	1
✅ nuxt-stable	26	0	1
✅ sveltekit-stable	26	0	1
✅ vite-stable	26	0	1

❌ 🪟 Windows

App	Passed	Failed	Skipped
❌ nextjs-turbopack	0	27	0

❌ 🌍 Community Worlds

App	Passed	Failed	Skipped
❌ mongodb-dev	0	3	0
❌ mongodb	0	27	0
✅ redis-dev	3	0	0
❌ redis	26	1	0
✅ starter-dev	3	0	0
❌ starter	19	8	0
✅ turso-dev	3	0	0
❌ turso	26	1	0

---

📋 View full workflow run

---

❌ Some E2E test jobs failed:

• Vercel Prod: success
• Local Dev: failure
• Local Prod: success
• Local Postgres: success
• Windows: success

Check the workflow run for details.

[github-actions]

📊 Benchmark Results

📈 Comparing against baseline from main branch. Green 🟢 = faster, Red 🔺 = slower.

workflow with no steps

💻 Local Development

World	Framework	Workflow Time	Wall Time	Overhead	Samples	vs Fastest
💻 Local	🥇 Next.js (Turbopack)	0.031s (-18.0% 🟢)	1.015s (~)	0.984s	10	1.00x
🌐 Starter	Next.js (Turbopack)	0.036s (+0.6%)	1.013s (~)	0.977s	10	1.17x
🌐 Redis	Next.js (Turbopack)	0.038s (-5.2% 🟢)	1.017s (~)	0.979s	10	1.24x
💻 Local	Nitro	0.043s (~)	1.008s (~)	0.964s	10	1.40x
💻 Local	Express	0.046s (+6.9% 🔺)	1.008s (~)	0.961s	10	1.50x
🌐 Turso	Next.js (Turbopack)	0.049s (-38.7% 🟢)	1.013s (~)	0.964s	10	1.59x
🌐 MongoDB	Next.js (Turbopack)	0.123s (+138.1% 🔺)	1.016s (~)	0.893s	10	3.97x
🐘 Postgres	Next.js (Turbopack)	0.290s (-18.3% 🟢)	1.021s (~)	0.730s	10	9.39x
🐘 Postgres	Nitro	0.304s (+1.8%)	1.012s (~)	0.709s	10	9.83x
🐘 Postgres	Express	0.326s (+11.1% 🔺)	1.014s (-0.6%)	0.688s	10	10.54x

▲ Production (Vercel)

World	Framework	Workflow Time	Wall Time	Overhead	Samples	vs Fastest
▲ Vercel	🥇 Nitro	0.545s (-7.2% 🟢)	1.667s (+12.0% 🔺)	1.122s	10	1.00x
▲ Vercel	Next.js (Turbopack)	0.559s (+4.6%)	1.397s (-13.4% 🟢)	0.839s	10	1.03x
▲ Vercel	Express	0.588s (+19.2% 🔺)	1.477s (+7.5% 🔺)	0.889s	10	1.08x

🔍 Observability: Nitro | Next.js (Turbopack) | Express

workflow with 1 step

💻 Local Development

World	Framework	Workflow Time	Wall Time	Overhead	Samples	vs Fastest
💻 Local	🥇 Next.js (Turbopack)	1.075s (-1.7%)	2.012s (~)	0.937s	10	1.00x
🌐 Starter	Next.js (Turbopack)	1.081s (~)	2.011s (~)	0.929s	10	1.01x
🌐 Redis	Next.js (Turbopack)	1.098s (~)	2.013s (~)	0.915s	10	1.02x
💻 Local	Nitro	1.114s (~)	2.006s (~)	0.891s	10	1.04x
💻 Local	Express	1.118s (~)	2.008s (~)	0.890s	10	1.04x
🌐 Turso	Next.js (Turbopack)	1.278s (-0.7%)	2.012s (~)	0.734s	10	1.19x
🌐 MongoDB	Next.js (Turbopack)	1.286s (-0.6%)	2.014s (~)	0.728s	10	1.20x
🐘 Postgres	Nitro	1.820s (-15.6% 🟢)	2.312s (-23.3% 🟢)	0.492s	10	1.69x
🐘 Postgres	Next.js (Turbopack)	1.855s (-20.5% 🟢)	2.017s (-33.1% 🟢)	0.162s	10	1.73x
🐘 Postgres	Express	2.160s (~)	3.015s (~)	0.855s	10	2.01x

▲ Production (Vercel)

World	Framework	Workflow Time	Wall Time	Overhead	Samples	vs Fastest
▲ Vercel	🥇 Next.js (Turbopack)	2.699s (+0.8%)	3.643s (-1.1%)	0.944s	10	1.00x
▲ Vercel	Nitro	2.707s (+8.7% 🔺)	3.680s (+1.7%)	0.974s	10	1.00x
▲ Vercel	Express	2.843s (+5.2% 🔺)	3.811s (+5.8% 🔺)	0.968s	10	1.05x

🔍 Observability: Next.js (Turbopack) | Nitro | Express

workflow with 10 sequential steps

💻 Local Development

World	Framework	Workflow Time	Wall Time	Overhead	Samples	vs Fastest
💻 Local	🥇 Next.js (Turbopack)	10.523s (-1.1%)	11.016s (~)	0.493s	5	1.00x
🌐 Starter	Next.js (Turbopack)	10.598s (~)	11.012s (~)	0.414s	5	1.01x
🌐 Redis	Next.js (Turbopack)	10.673s (~)	11.018s (~)	0.346s	5	1.01x
💻 Local	Nitro	10.789s (~)	11.012s (~)	0.224s	5	1.03x
💻 Local	Express	10.810s (~)	11.017s (~)	0.207s	5	1.03x
🌐 MongoDB	Next.js (Turbopack)	11.921s (-2.2%)	12.428s (-4.5%)	0.507s	5	1.13x
🌐 Turso	Next.js (Turbopack)	12.183s (~)	13.023s (~)	0.840s	5	1.16x
🐘 Postgres	Next.js (Turbopack)	15.190s (-13.5% 🟢)	16.039s (-12.1% 🟢)	0.848s	5	1.44x
🐘 Postgres	Nitro	15.251s (-25.5% 🟢)	16.027s (-23.8% 🟢)	0.776s	5	1.45x
🐘 Postgres	Express	20.426s (~)	21.028s (~)	0.602s	5	1.94x

▲ Production (Vercel)

World	Framework	Workflow Time	Wall Time	Overhead	Samples	vs Fastest
▲ Vercel	🥇 Nitro	21.507s (+1.3%)	22.528s (+2.4%)	1.021s	5	1.00x
▲ Vercel	Next.js (Turbopack)	21.614s (~)	22.343s (-0.7%)	0.730s	5	1.00x
▲ Vercel	Express	22.161s (+4.2%)	23.050s (+4.9%)	0.889s	5	1.03x

🔍 Observability: Nitro | Next.js (Turbopack) | Express

Promise.all with 10 concurrent steps

💻 Local Development

World	Framework	Workflow Time	Wall Time	Overhead	Samples	vs Fastest
💻 Local	🥇 Next.js (Turbopack)	1.335s (-4.8%)	2.012s (~)	0.677s	15	1.00x
🌐 Starter	Next.js (Turbopack)	1.345s (+0.6%)	2.008s (~)	0.663s	15	1.01x
🌐 Redis	Next.js (Turbopack)	1.363s (-0.6%)	2.010s (~)	0.647s	15	1.02x
💻 Local	Nitro	1.411s (~)	2.005s (~)	0.593s	15	1.06x
💻 Local	Express	1.428s (+1.1%)	2.007s (~)	0.578s	15	1.07x
🐘 Postgres	Nitro	1.924s (-19.0% 🟢)	2.078s (-31.0% 🟢)	0.154s	15	1.44x
🌐 Turso	Next.js (Turbopack)	2.115s (~)	3.016s (~)	0.901s	10	1.58x
🌐 MongoDB	Next.js (Turbopack)	2.133s (-1.2%)	3.014s (~)	0.881s	10	1.60x
🐘 Postgres	Next.js (Turbopack)	2.199s (+12.1% 🔺)	2.597s (+24.9% 🔺)	0.399s	12	1.65x
🐘 Postgres	Express	2.473s (+4.3%)	3.013s (~)	0.539s	10	1.85x

▲ Production (Vercel)

World	Framework	Workflow Time	Wall Time	Overhead	Samples	vs Fastest
▲ Vercel	🥇 Nitro	2.863s (+1.5%)	3.926s (+2.2%)	1.063s	8	1.00x
▲ Vercel	Next.js (Turbopack)	3.116s (+5.9% 🔺)	3.779s (-3.5%)	0.663s	8	1.09x
▲ Vercel	Express	3.295s (+22.6% 🔺)	4.156s (+15.3% 🔺)	0.861s	8	1.15x

🔍 Observability: Nitro | Next.js (Turbopack) | Express

Promise.all with 25 concurrent steps

💻 Local Development

World	Framework	Workflow Time	Wall Time	Overhead	Samples	vs Fastest
💻 Local	🥇 Next.js (Turbopack)	2.036s (-0.8%)	2.769s (-4.7%)	0.733s	11	1.00x
💻 Local	Nitro	2.222s (-1.1%)	3.150s (-1.3%)	0.928s	10	1.09x
💻 Local	Express	2.320s (+3.6%)	3.219s (+1.2%)	0.899s	10	1.14x
🌐 Starter	Next.js (Turbopack)	2.463s (~)	3.008s (~)	0.545s	10	1.21x
🌐 Redis	Next.js (Turbopack)	2.507s (+0.6%)	3.013s (~)	0.506s	10	1.23x
🐘 Postgres	Nitro	2.650s (-9.5% 🟢)	3.011s (-9.3% 🟢)	0.362s	10	1.30x
🐘 Postgres	Next.js (Turbopack)	2.650s (-0.6%)	3.014s (~)	0.364s	10	1.30x
🐘 Postgres	Express	2.842s (-7.1% 🟢)	3.011s (-18.6% 🟢)	0.169s	10	1.40x
🌐 MongoDB	Next.js (Turbopack)	4.680s (+2.3%)	5.182s (~)	0.502s	6	2.30x
🌐 Turso	Next.js (Turbopack)	4.709s (+1.7%)	5.185s (~)	0.476s	6	2.31x

▲ Production (Vercel)

World	Framework	Workflow Time	Wall Time	Overhead	Samples	vs Fastest
▲ Vercel	🥇 Express	3.074s (-7.4% 🟢)	3.726s (-5.5% 🟢)	0.652s	9	1.00x
▲ Vercel	Nitro	3.320s (-7.5% 🟢)	3.837s (-9.1% 🟢)	0.517s	8	1.08x
▲ Vercel	Next.js (Turbopack)	3.490s (-6.7% 🟢)	4.287s (-1.0%)	0.797s	7	1.14x

🔍 Observability: Express | Nitro | Next.js (Turbopack)

Promise.race with 10 concurrent steps

💻 Local Development

World	Framework	Workflow Time	Wall Time	Overhead	Samples	vs Fastest
💻 Local	🥇 Next.js (Turbopack)	1.359s (-1.3%)	2.012s (~)	0.654s	15	1.00x
🌐 Starter	Next.js (Turbopack)	1.359s (-0.9%)	2.007s (~)	0.648s	15	1.00x
🌐 Redis	Next.js (Turbopack)	1.367s (~)	2.009s (~)	0.642s	15	1.01x
💻 Local	Nitro	1.447s (+2.6%)	2.005s (~)	0.557s	15	1.07x
💻 Local	Express	1.450s (+1.5%)	2.006s (~)	0.555s	15	1.07x
🐘 Postgres	Nitro	1.798s (-9.1% 🟢)	2.009s (-6.8% 🟢)	0.210s	15	1.32x
🐘 Postgres	Next.js (Turbopack)	1.832s (+4.2%)	2.012s (~)	0.180s	15	1.35x
🐘 Postgres	Express	2.031s (+7.0% 🔺)	2.522s (+21.4% 🔺)	0.492s	12	1.49x
🌐 MongoDB	Next.js (Turbopack)	2.127s (~)	3.013s (~)	0.886s	10	1.57x
🌐 Turso	Next.js (Turbopack)	2.151s (+1.3%)	3.015s (~)	0.864s	10	1.58x

▲ Production (Vercel)

World	Framework	Workflow Time	Wall Time	Overhead	Samples	vs Fastest
▲ Vercel	🥇 Nitro	2.708s (~)	3.822s (+1.3%)	1.115s	8	1.00x
▲ Vercel	Express	2.888s (+9.6% 🔺)	3.577s (+1.6%)	0.689s	9	1.07x
▲ Vercel	Next.js (Turbopack)	3.025s (+7.4% 🔺)	3.790s (-2.7%)	0.765s	8	1.12x

🔍 Observability: Nitro | Express | Next.js (Turbopack)

Promise.race with 25 concurrent steps

💻 Local Development

World	Framework	Workflow Time	Wall Time	Overhead	Samples	vs Fastest
💻 Local	🥇 Next.js (Turbopack)	2.016s (-5.7% 🟢)	2.556s (-14.2% 🟢)	0.539s	12	1.00x
💻 Local	Nitro	2.240s (-0.9%)	3.181s (-1.0%)	0.940s	10	1.11x
💻 Local	Express	2.393s (+2.8%)	3.292s (+0.7%)	0.899s	10	1.19x
🌐 Redis	Next.js (Turbopack)	2.468s (~)	3.011s (~)	0.543s	10	1.22x
🌐 Starter	Next.js (Turbopack)	2.476s (+1.2%)	3.012s (~)	0.536s	10	1.23x
🐘 Postgres	Nitro	2.625s (+1.7%)	3.017s (~)	0.392s	10	1.30x
🐘 Postgres	Next.js (Turbopack)	2.718s (+10.8% 🔺)	3.022s (~)	0.304s	10	1.35x
🐘 Postgres	Express	2.789s (+1.6%)	3.014s (~)	0.226s	10	1.38x
🌐 Turso	Next.js (Turbopack)	4.675s (-3.3%)	5.188s (-3.0%)	0.513s	6	2.32x
🌐 MongoDB	Next.js (Turbopack)	4.689s (-2.0%)	5.183s (~)	0.494s	6	2.33x

▲ Production (Vercel)

World	Framework	Workflow Time	Wall Time	Overhead	Samples	vs Fastest
▲ Vercel	🥇 Nitro	2.932s (-8.4% 🟢)	3.706s (-4.7%)	0.774s	9	1.00x
▲ Vercel	Next.js (Turbopack)	2.993s (-3.0%)	3.796s (-2.1%)	0.803s	9	1.02x
▲ Vercel	Express	3.069s (-4.7%)	3.698s (~)	0.629s	9	1.05x

🔍 Observability: Nitro | Next.js (Turbopack) | Express

Stream Benchmarks(includes TTFB metrics)

workflow with stream

💻 Local Development

World	Framework	Workflow Time	TTFB	Slurp	Wall Time	Overhead	Samples	vs Fastest
💻 Local	🥇 Next.js (Turbopack)	0.107s (-24.2% 🟢)	1.003s (~)	0.023s (+41.0% 🔺)	1.034s (+0.7%)	0.927s	10	1.00x
🌐 Starter	Next.js (Turbopack)	0.130s (+1.2%)	1.005s (~)	0.000s (~)	1.011s (~)	0.881s	10	1.21x
🌐 Redis	Next.js (Turbopack)	0.142s (-3.0%)	1.005s (~)	0.000s (+Infinity% 🔺)	1.014s (~)	0.871s	10	1.33x
💻 Local	Nitro	0.178s (+0.9%)	0.993s (~)	0.017s (+17.2% 🔺)	1.023s (~)	0.846s	10	1.66x
💻 Local	Express	0.184s (+3.7%)	0.992s (~)	0.016s (+5.2% 🔺)	1.024s (~)	0.839s	10	1.72x
🌐 Turso	Next.js (Turbopack)	0.464s (-9.5% 🟢)	0.978s (+4.7%)	0.000s (+Infinity% 🔺)	1.013s (~)	0.550s	10	4.33x
🌐 MongoDB	Next.js (Turbopack)	0.508s (-3.9%)	0.937s (+1.9%)	0.000s (~)	1.014s (~)	0.506s	10	4.75x
🐘 Postgres	Nitro	1.385s (-39.5% 🟢)	1.647s (-40.1% 🟢)	0.000s (-100.0% 🟢)	2.011s (-33.3% 🟢)	0.626s	10	12.95x
🐘 Postgres	Next.js (Turbopack)	1.397s (-4.1%)	1.700s (+2.2%)	0.000s (NaN%)	2.022s (~)	0.626s	10	13.05x
🐘 Postgres	Express	2.375s (+4.1%)	2.668s (-3.5%)	0.000s (+Infinity% 🔺)	3.014s (~)	0.639s	10	22.20x

▲ Production (Vercel)

World	Framework	Workflow Time	TTFB	Slurp	Wall Time	Overhead	Samples	vs Fastest
▲ Vercel	🥇 Express	2.751s (+8.0% 🔺)	3.198s (+4.1%)	0.481s (+4.3%)	4.126s (+4.5%)	1.375s	10	1.00x
▲ Vercel	Next.js (Turbopack)	2.795s (+7.8% 🔺)	3.217s (~)	0.535s (-60.0% 🟢)	4.183s (-16.4% 🟢)	1.389s	10	1.02x
▲ Vercel	Nitro	2.889s (+6.5% 🔺)	3.249s (+2.0%)	0.718s (+108.1% 🔺)	4.493s (+12.6% 🔺)	1.604s	10	1.05x

🔍 Observability: Express | Next.js (Turbopack) | Nitro

Summary

Fastest Framework by World

Winner determined by most benchmark wins

World	🥇 Fastest Framework	Wins
💻 Local	Next.js (Turbopack)	8/8
🐘 Postgres	Nitro	6/8
▲ Vercel	Nitro	5/8

Fastest World by Framework

Winner determined by most benchmark wins

Framework	🥇 Fastest World	Wins
Express	💻 Local	8/8
Next.js (Turbopack)	💻 Local	8/8
Nitro	💻 Local	8/8

Column Definitions

• Workflow Time: Runtime reported by workflow (completedAt - createdAt) - primary metric
• TTFB: Time to First Byte - time from workflow start until first stream byte received (stream benchmarks only)
• Slurp: Time from first byte to complete stream consumption (stream benchmarks only)
• Wall Time: Total testbench time (trigger workflow + poll for result)
• Overhead: Testbench overhead (Wall Time - Workflow Time)
• Samples: Number of benchmark iterations run
• vs Fastest: How much slower compared to the fastest configuration for this benchmark

Worlds:

• 💻 Local: In-memory filesystem world (local development)
• 🐘 Postgres: PostgreSQL database world (local development)
• ▲ Vercel: Vercel production/preview deployment
• 🌐 Starter: Community world (local development)
• 🌐 Turso: Community world (local development)
• 🌐 MongoDB: Community world (local development)
• 🌐 Redis: Community world (local development)
• 🌐 Jazz: Community world (local development)

---

📋 View full workflow run

[vercel-release-bot]

This PR was opened by the Changesets release GitHub action. When you're ready to do a release, you can merge this and the packages will be published to npm automatically. If you're not ready to do a release yet, that's fine, whenever you add more changesets to main, this PR will be updated.

⚠️⚠️⚠️⚠️⚠️⚠️

main is currently in pre mode so this branch has prereleases rather than normal releases. If you want to exit prereleases, run changeset pre exit on main.

⚠️⚠️⚠️⚠️⚠️⚠️

Releases

@workflow/ai@4.0.1-beta.38

Patch Changes

• #69525bfa52 Thanks @ctate! - Fix: Handle object-style finishReason for AI SDK v5/v6 compatibility

• Updated dependencies []:

  • workflow@4.0.1-beta.38

@workflow/cli@4.0.1-beta.38

Patch Changes

• #68480955e7 Thanks @VaguelySerious! - Allow opening UI without a valid local config detected, UI will show warning and watch folder

• Updated dependencies [f989613]:

  • @workflow/web@4.0.1-beta.22

@workflow/web@4.0.1-beta.22

Patch Changes

• #694f989613 Thanks @VaguelySerious! - Add error boundaries around tabs in run detail view

workflow@4.0.1-beta.38

Patch Changes

• Updated dependencies [80955e7]:
  • @workflow/cli@4.0.1-beta.38

@workflow/world-testing@4.0.1-beta.39

Patch Changes

• Updated dependencies [80955e7]:
  • @workflow/cli@4.0.1-beta.38
  • workflow@4.0.1-beta.38

[vercel]

The latest updates on your projects. Learn more about Vercel for GitHub.

Project	Deployment	Review	Updated (UTC)
example-nextjs-workflow-turbopack	Ready	Preview, Comment	Dec 28, 2025 5:03pm
example-nextjs-workflow-webpack	Ready	Preview, Comment	Dec 28, 2025 5:03pm
example-workflow	Ready	Preview, Comment	Dec 28, 2025 5:03pm
workbench-astro-workflow	Ready	Preview, Comment	Dec 28, 2025 5:03pm
workbench-express-workflow	Ready	Preview, Comment	Dec 28, 2025 5:03pm
workbench-fastify-workflow	Ready	Preview, Comment	Dec 28, 2025 5:03pm
workbench-hono-workflow	Ready	Preview, Comment	Dec 28, 2025 5:03pm
workbench-nitro-workflow	Ready	Preview, Comment	Dec 28, 2025 5:03pm
workbench-nuxt-workflow	Ready	Preview, Comment	Dec 28, 2025 5:03pm
workbench-sveltekit-workflow	Ready	Preview, Comment	Dec 28, 2025 5:03pm
workbench-vite-workflow	Ready	Preview, Comment	Dec 28, 2025 5:03pm
workflow-docs	Ready	Preview, Comment	Dec 28, 2025 5:03pm

[github-actions]

🧪 E2E Test Results

❌ Some tests failed

Summary

	Passed	Failed	Skipped	Total
✅ ▲ Vercel Production	286	0	11	297
❌ 💻 Local Development	236	26	8	270
✅ 📦 Local Production	262	0	8	270
✅ 🐘 Local Postgres	262	0	8	270
❌ 🪟 Windows	0	27	0	27
❌ 🌍 Community Worlds	80	40	0	120
Total	1126	93	35	1254

❌ Failed Tests

💻 Local Development (26 failed)

nuxt-stable (26 failed):

• addTenWorkflow
• addTenWorkflow
• promiseAllWorkflow
• promiseRaceWorkflow
• promiseAnyWorkflow
• readableStreamWorkflow
• hookWorkflow
• webhookWorkflow
• webhook route with invalid token
• sleepingWorkflow
• nullByteWorkflow
• workflowAndStepMetadataWorkflow
• outputStreamWorkflow
• outputStreamInsideStepWorkflow - getWritable() called inside step functions
• fetchWorkflow
• promiseRaceStressTestWorkflow
• retryAttemptCounterWorkflow
• retryableAndFatalErrorWorkflow
• stepDirectCallWorkflow - calling step functions directly outside workflow context
• crossFileErrorWorkflow - stack traces work across imported modules
• hookCleanupTestWorkflow - hook token reuse after workflow completion
• stepFunctionPassingWorkflow - step function references can be passed as arguments (without closure vars)
• stepFunctionWithClosureWorkflow - step function with closure variables passed as argument
• closureVariableWorkflow - nested step functions with closure variables
• spawnWorkflowFromStepWorkflow - spawning a child workflow using start() inside a step
• health check endpoint - workflow and step endpoints respond to __health query parameter

🪟 Windows (27 failed)

nextjs-turbopack (27 failed):

• addTenWorkflow
• addTenWorkflow
• should work with react rendering in step
• promiseAllWorkflow
• promiseRaceWorkflow
• promiseAnyWorkflow
• readableStreamWorkflow
• hookWorkflow
• webhookWorkflow
• webhook route with invalid token
• sleepingWorkflow
• nullByteWorkflow
• workflowAndStepMetadataWorkflow
• outputStreamWorkflow
• outputStreamInsideStepWorkflow - getWritable() called inside step functions
• fetchWorkflow
• promiseRaceStressTestWorkflow
• retryAttemptCounterWorkflow
• retryableAndFatalErrorWorkflow
• stepDirectCallWorkflow - calling step functions directly outside workflow context
• crossFileErrorWorkflow - stack traces work across imported modules
• hookCleanupTestWorkflow - hook token reuse after workflow completion
• stepFunctionPassingWorkflow - step function references can be passed as arguments (without closure vars)
• stepFunctionWithClosureWorkflow - step function with closure variables passed as argument
• closureVariableWorkflow - nested step functions with closure variables
• spawnWorkflowFromStepWorkflow - spawning a child workflow using start() inside a step
• health check endpoint - workflow and step endpoints respond to __health query parameter

🌍 Community Worlds (40 failed)

mongodb-dev (3 failed):

• dev e2e should rebuild on step change
• dev e2e should rebuild on workflow change
• dev e2e should rebuild on adding workflow file

mongodb (27 failed):

• addTenWorkflow
• addTenWorkflow
• should work with react rendering in step
• promiseAllWorkflow
• promiseRaceWorkflow
• promiseAnyWorkflow
• readableStreamWorkflow
• hookWorkflow
• webhookWorkflow
• webhook route with invalid token
• sleepingWorkflow
• nullByteWorkflow
• workflowAndStepMetadataWorkflow
• outputStreamWorkflow
• outputStreamInsideStepWorkflow - getWritable() called inside step functions
• fetchWorkflow
• promiseRaceStressTestWorkflow
• retryAttemptCounterWorkflow
• retryableAndFatalErrorWorkflow
• stepDirectCallWorkflow - calling step functions directly outside workflow context
• crossFileErrorWorkflow - stack traces work across imported modules
• hookCleanupTestWorkflow - hook token reuse after workflow completion
• stepFunctionPassingWorkflow - step function references can be passed as arguments (without closure vars)
• stepFunctionWithClosureWorkflow - step function with closure variables passed as argument
• closureVariableWorkflow - nested step functions with closure variables
• spawnWorkflowFromStepWorkflow - spawning a child workflow using start() inside a step
• health check endpoint - workflow and step endpoints respond to __health query parameter

redis (1 failed):

• webhookWorkflow

starter (8 failed):

• addTenWorkflow
• addTenWorkflow
• retryAttemptCounterWorkflow
• crossFileErrorWorkflow - stack traces work across imported modules
• hookCleanupTestWorkflow - hook token reuse after workflow completion
• stepFunctionPassingWorkflow - step function references can be passed as arguments (without closure vars)
• stepFunctionWithClosureWorkflow - step function with closure variables passed as argument
• spawnWorkflowFromStepWorkflow - spawning a child workflow using start() inside a step

turso (1 failed):

• webhookWorkflow

Details by Category

✅ ▲ Vercel Production

App	Passed	Failed	Skipped
✅ astro	26	0	1
✅ example	26	0	1
✅ express	26	0	1
✅ fastify	26	0	1
✅ hono	26	0	1
✅ nextjs-turbopack	26	0	1
✅ nextjs-webpack	26	0	1
✅ nitro	26	0	1
✅ nuxt	26	0	1
✅ sveltekit	26	0	1
✅ vite	26	0	1

❌ 💻 Local Development

App	Passed	Failed	Skipped
✅ astro-stable	26	0	1
✅ express-stable	26	0	1
✅ fastify-stable	26	0	1
✅ hono-stable	26	0	1
✅ nextjs-turbopack-stable	27	0	0
✅ nextjs-webpack-stable	27	0	0
✅ nitro-stable	26	0	1
❌ nuxt-stable	0	26	1
✅ sveltekit-stable	26	0	1
✅ vite-stable	26	0	1

✅ 📦 Local Production

App	Passed	Failed	Skipped
✅ astro-stable	26	0	1
✅ express-stable	26	0	1
✅ fastify-stable	26	0	1
✅ hono-stable	26	0	1
✅ nextjs-turbopack-stable	27	0	0
✅ nextjs-webpack-stable	27	0	0
✅ nitro-stable	26	0	1
✅ nuxt-stable	26	0	1
✅ sveltekit-stable	26	0	1
✅ vite-stable	26	0	1

✅ 🐘 Local Postgres

App	Passed	Failed	Skipped
✅ astro-stable	26	0	1
✅ express-stable	26	0	1
✅ fastify-stable	26	0	1
✅ hono-stable	26	0	1
✅ nextjs-turbopack-stable	27	0	0
✅ nextjs-webpack-stable	27	0	0
✅ nitro-stable	26	0	1
✅ nuxt-stable	26	0	1
✅ sveltekit-stable	26	0	1
✅ vite-stable	26	0	1

❌ 🪟 Windows

App	Passed	Failed	Skipped
❌ nextjs-turbopack	0	27	0

❌ 🌍 Community Worlds

App	Passed	Failed	Skipped
❌ mongodb-dev	0	3	0
❌ mongodb	0	27	0
✅ redis-dev	3	0	0
❌ redis	26	1	0
✅ starter-dev	3	0	0
❌ starter	19	8	0
✅ turso-dev	3	0	0
❌ turso	26	1	0

---

📋 View full workflow run

---

❌ Some E2E test jobs failed:

• Vercel Prod: success
• Local Dev: failure
• Local Prod: success
• Local Postgres: success
• Windows: success

Check the workflow run for details.

[github-actions]

📊 Benchmark Results

📈 Comparing against baseline from main branch. Green 🟢 = faster, Red 🔺 = slower.

workflow with no steps

💻 Local Development

World	Framework	Workflow Time	Wall Time	Overhead	Samples	vs Fastest
💻 Local	🥇 Next.js (Turbopack)	0.031s (-18.0% 🟢)	1.015s (~)	0.984s	10	1.00x
🌐 Starter	Next.js (Turbopack)	0.036s (+0.6%)	1.013s (~)	0.977s	10	1.17x
🌐 Redis	Next.js (Turbopack)	0.038s (-5.2% 🟢)	1.017s (~)	0.979s	10	1.24x
💻 Local	Nitro	0.043s (~)	1.008s (~)	0.964s	10	1.40x
💻 Local	Express	0.046s (+6.9% 🔺)	1.008s (~)	0.961s	10	1.50x
🌐 Turso	Next.js (Turbopack)	0.049s (-38.7% 🟢)	1.013s (~)	0.964s	10	1.59x
🌐 MongoDB	Next.js (Turbopack)	0.123s (+138.1% 🔺)	1.016s (~)	0.893s	10	3.97x
🐘 Postgres	Next.js (Turbopack)	0.290s (-18.3% 🟢)	1.021s (~)	0.730s	10	9.39x
🐘 Postgres	Nitro	0.304s (+1.8%)	1.012s (~)	0.709s	10	9.83x
🐘 Postgres	Express	0.326s (+11.1% 🔺)	1.014s (-0.6%)	0.688s	10	10.54x

▲ Production (Vercel)

World	Framework	Workflow Time	Wall Time	Overhead	Samples	vs Fastest
▲ Vercel	🥇 Nitro	0.545s (-7.2% 🟢)	1.667s (+12.0% 🔺)	1.122s	10	1.00x
▲ Vercel	Next.js (Turbopack)	0.559s (+4.6%)	1.397s (-13.4% 🟢)	0.839s	10	1.03x
▲ Vercel	Express	0.588s (+19.2% 🔺)	1.477s (+7.5% 🔺)	0.889s	10	1.08x

🔍 Observability: Nitro | Next.js (Turbopack) | Express

workflow with 1 step

💻 Local Development

World	Framework	Workflow Time	Wall Time	Overhead	Samples	vs Fastest
💻 Local	🥇 Next.js (Turbopack)	1.075s (-1.7%)	2.012s (~)	0.937s	10	1.00x
🌐 Starter	Next.js (Turbopack)	1.081s (~)	2.011s (~)	0.929s	10	1.01x
🌐 Redis	Next.js (Turbopack)	1.098s (~)	2.013s (~)	0.915s	10	1.02x
💻 Local	Nitro	1.114s (~)	2.006s (~)	0.891s	10	1.04x
💻 Local	Express	1.118s (~)	2.008s (~)	0.890s	10	1.04x
🌐 Turso	Next.js (Turbopack)	1.278s (-0.7%)	2.012s (~)	0.734s	10	1.19x
🌐 MongoDB	Next.js (Turbopack)	1.286s (-0.6%)	2.014s (~)	0.728s	10	1.20x
🐘 Postgres	Nitro	1.820s (-15.6% 🟢)	2.312s (-23.3% 🟢)	0.492s	10	1.69x
🐘 Postgres	Next.js (Turbopack)	1.855s (-20.5% 🟢)	2.017s (-33.1% 🟢)	0.162s	10	1.73x
🐘 Postgres	Express	2.160s (~)	3.015s (~)	0.855s	10	2.01x

▲ Production (Vercel)

World	Framework	Workflow Time	Wall Time	Overhead	Samples	vs Fastest
▲ Vercel	🥇 Next.js (Turbopack)	2.699s (+0.8%)	3.643s (-1.1%)	0.944s	10	1.00x
▲ Vercel	Nitro	2.707s (+8.7% 🔺)	3.680s (+1.7%)	0.974s	10	1.00x
▲ Vercel	Express	2.843s (+5.2% 🔺)	3.811s (+5.8% 🔺)	0.968s	10	1.05x

🔍 Observability: Next.js (Turbopack) | Nitro | Express

workflow with 10 sequential steps

💻 Local Development

World	Framework	Workflow Time	Wall Time	Overhead	Samples	vs Fastest
💻 Local	🥇 Next.js (Turbopack)	10.523s (-1.1%)	11.016s (~)	0.493s	5	1.00x
🌐 Starter	Next.js (Turbopack)	10.598s (~)	11.012s (~)	0.414s	5	1.01x
🌐 Redis	Next.js (Turbopack)	10.673s (~)	11.018s (~)	0.346s	5	1.01x
💻 Local	Nitro	10.789s (~)	11.012s (~)	0.224s	5	1.03x
💻 Local	Express	10.810s (~)	11.017s (~)	0.207s	5	1.03x
🌐 MongoDB	Next.js (Turbopack)	11.921s (-2.2%)	12.428s (-4.5%)	0.507s	5	1.13x
🌐 Turso	Next.js (Turbopack)	12.183s (~)	13.023s (~)	0.840s	5	1.16x
🐘 Postgres	Next.js (Turbopack)	15.190s (-13.5% 🟢)	16.039s (-12.1% 🟢)	0.848s	5	1.44x
🐘 Postgres	Nitro	15.251s (-25.5% 🟢)	16.027s (-23.8% 🟢)	0.776s	5	1.45x
🐘 Postgres	Express	20.426s (~)	21.028s (~)	0.602s	5	1.94x

▲ Production (Vercel)

World	Framework	Workflow Time	Wall Time	Overhead	Samples	vs Fastest
▲ Vercel	🥇 Nitro	21.507s (+1.3%)	22.528s (+2.4%)	1.021s	5	1.00x
▲ Vercel	Next.js (Turbopack)	21.614s (~)	22.343s (-0.7%)	0.730s	5	1.00x
▲ Vercel	Express	22.161s (+4.2%)	23.050s (+4.9%)	0.889s	5	1.03x

🔍 Observability: Nitro | Next.js (Turbopack) | Express

Promise.all with 10 concurrent steps

💻 Local Development

World	Framework	Workflow Time	Wall Time	Overhead	Samples	vs Fastest
💻 Local	🥇 Next.js (Turbopack)	1.335s (-4.8%)	2.012s (~)	0.677s	15	1.00x
🌐 Starter	Next.js (Turbopack)	1.345s (+0.6%)	2.008s (~)	0.663s	15	1.01x
🌐 Redis	Next.js (Turbopack)	1.363s (-0.6%)	2.010s (~)	0.647s	15	1.02x
💻 Local	Nitro	1.411s (~)	2.005s (~)	0.593s	15	1.06x
💻 Local	Express	1.428s (+1.1%)	2.007s (~)	0.578s	15	1.07x
🐘 Postgres	Nitro	1.924s (-19.0% 🟢)	2.078s (-31.0% 🟢)	0.154s	15	1.44x
🌐 Turso	Next.js (Turbopack)	2.115s (~)	3.016s (~)	0.901s	10	1.58x
🌐 MongoDB	Next.js (Turbopack)	2.133s (-1.2%)	3.014s (~)	0.881s	10	1.60x
🐘 Postgres	Next.js (Turbopack)	2.199s (+12.1% 🔺)	2.597s (+24.9% 🔺)	0.399s	12	1.65x
🐘 Postgres	Express	2.473s (+4.3%)	3.013s (~)	0.539s	10	1.85x

▲ Production (Vercel)

World	Framework	Workflow Time	Wall Time	Overhead	Samples	vs Fastest
▲ Vercel	🥇 Nitro	2.863s (+1.5%)	3.926s (+2.2%)	1.063s	8	1.00x
▲ Vercel	Next.js (Turbopack)	3.116s (+5.9% 🔺)	3.779s (-3.5%)	0.663s	8	1.09x
▲ Vercel	Express	3.295s (+22.6% 🔺)	4.156s (+15.3% 🔺)	0.861s	8	1.15x

🔍 Observability: Nitro | Next.js (Turbopack) | Express

Promise.all with 25 concurrent steps

💻 Local Development

World	Framework	Workflow Time	Wall Time	Overhead	Samples	vs Fastest
💻 Local	🥇 Next.js (Turbopack)	2.036s (-0.8%)	2.769s (-4.7%)	0.733s	11	1.00x
💻 Local	Nitro	2.222s (-1.1%)	3.150s (-1.3%)	0.928s	10	1.09x
💻 Local	Express	2.320s (+3.6%)	3.219s (+1.2%)	0.899s	10	1.14x
🌐 Starter	Next.js (Turbopack)	2.463s (~)	3.008s (~)	0.545s	10	1.21x
🌐 Redis	Next.js (Turbopack)	2.507s (+0.6%)	3.013s (~)	0.506s	10	1.23x
🐘 Postgres	Nitro	2.650s (-9.5% 🟢)	3.011s (-9.3% 🟢)	0.362s	10	1.30x
🐘 Postgres	Next.js (Turbopack)	2.650s (-0.6%)	3.014s (~)	0.364s	10	1.30x
🐘 Postgres	Express	2.842s (-7.1% 🟢)	3.011s (-18.6% 🟢)	0.169s	10	1.40x
🌐 MongoDB	Next.js (Turbopack)	4.680s (+2.3%)	5.182s (~)	0.502s	6	2.30x
🌐 Turso	Next.js (Turbopack)	4.709s (+1.7%)	5.185s (~)	0.476s	6	2.31x

▲ Production (Vercel)

World	Framework	Workflow Time	Wall Time	Overhead	Samples	vs Fastest
▲ Vercel	🥇 Express	3.074s (-7.4% 🟢)	3.726s (-5.5% 🟢)	0.652s	9	1.00x
▲ Vercel	Nitro	3.320s (-7.5% 🟢)	3.837s (-9.1% 🟢)	0.517s	8	1.08x
▲ Vercel	Next.js (Turbopack)	3.490s (-6.7% 🟢)	4.287s (-1.0%)	0.797s	7	1.14x

🔍 Observability: Express | Nitro | Next.js (Turbopack)

Promise.race with 10 concurrent steps

💻 Local Development

World	Framework	Workflow Time	Wall Time	Overhead	Samples	vs Fastest
💻 Local	🥇 Next.js (Turbopack)	1.359s (-1.3%)	2.012s (~)	0.654s	15	1.00x
🌐 Starter	Next.js (Turbopack)	1.359s (-0.9%)	2.007s (~)	0.648s	15	1.00x
🌐 Redis	Next.js (Turbopack)	1.367s (~)	2.009s (~)	0.642s	15	1.01x
💻 Local	Nitro	1.447s (+2.6%)	2.005s (~)	0.557s	15	1.07x
💻 Local	Express	1.450s (+1.5%)	2.006s (~)	0.555s	15	1.07x
🐘 Postgres	Nitro	1.798s (-9.1% 🟢)	2.009s (-6.8% 🟢)	0.210s	15	1.32x
🐘 Postgres	Next.js (Turbopack)	1.832s (+4.2%)	2.012s (~)	0.180s	15	1.35x
🐘 Postgres	Express	2.031s (+7.0% 🔺)	2.522s (+21.4% 🔺)	0.492s	12	1.49x
🌐 MongoDB	Next.js (Turbopack)	2.127s (~)	3.013s (~)	0.886s	10	1.57x
🌐 Turso	Next.js (Turbopack)	2.151s (+1.3%)	3.015s (~)	0.864s	10	1.58x

▲ Production (Vercel)

World	Framework	Workflow Time	Wall Time	Overhead	Samples	vs Fastest
▲ Vercel	🥇 Nitro	2.708s (~)	3.822s (+1.3%)	1.115s	8	1.00x
▲ Vercel	Express	2.888s (+9.6% 🔺)	3.577s (+1.6%)	0.689s	9	1.07x
▲ Vercel	Next.js (Turbopack)	3.025s (+7.4% 🔺)	3.790s (-2.7%)	0.765s	8	1.12x

🔍 Observability: Nitro | Express | Next.js (Turbopack)

Promise.race with 25 concurrent steps

💻 Local Development

World	Framework	Workflow Time	Wall Time	Overhead	Samples	vs Fastest
💻 Local	🥇 Next.js (Turbopack)	2.016s (-5.7% 🟢)	2.556s (-14.2% 🟢)	0.539s	12	1.00x
💻 Local	Nitro	2.240s (-0.9%)	3.181s (-1.0%)	0.940s	10	1.11x
💻 Local	Express	2.393s (+2.8%)	3.292s (+0.7%)	0.899s	10	1.19x
🌐 Redis	Next.js (Turbopack)	2.468s (~)	3.011s (~)	0.543s	10	1.22x
🌐 Starter	Next.js (Turbopack)	2.476s (+1.2%)	3.012s (~)	0.536s	10	1.23x
🐘 Postgres	Nitro	2.625s (+1.7%)	3.017s (~)	0.392s	10	1.30x
🐘 Postgres	Next.js (Turbopack)	2.718s (+10.8% 🔺)	3.022s (~)	0.304s	10	1.35x
🐘 Postgres	Express	2.789s (+1.6%)	3.014s (~)	0.226s	10	1.38x
🌐 Turso	Next.js (Turbopack)	4.675s (-3.3%)	5.188s (-3.0%)	0.513s	6	2.32x
🌐 MongoDB	Next.js (Turbopack)	4.689s (-2.0%)	5.183s (~)	0.494s	6	2.33x

▲ Production (Vercel)

World	Framework	Workflow Time	Wall Time	Overhead	Samples	vs Fastest
▲ Vercel	🥇 Nitro	2.932s (-8.4% 🟢)	3.706s (-4.7%)	0.774s	9	1.00x
▲ Vercel	Next.js (Turbopack)	2.993s (-3.0%)	3.796s (-2.1%)	0.803s	9	1.02x
▲ Vercel	Express	3.069s (-4.7%)	3.698s (~)	0.629s	9	1.05x

🔍 Observability: Nitro | Next.js (Turbopack) | Express

Stream Benchmarks(includes TTFB metrics)

workflow with stream

💻 Local Development

World	Framework	Workflow Time	TTFB	Slurp	Wall Time	Overhead	Samples	vs Fastest
💻 Local	🥇 Next.js (Turbopack)	0.107s (-24.2% 🟢)	1.003s (~)	0.023s (+41.0% 🔺)	1.034s (+0.7%)	0.927s	10	1.00x
🌐 Starter	Next.js (Turbopack)	0.130s (+1.2%)	1.005s (~)	0.000s (~)	1.011s (~)	0.881s	10	1.21x
🌐 Redis	Next.js (Turbopack)	0.142s (-3.0%)	1.005s (~)	0.000s (+Infinity% 🔺)	1.014s (~)	0.871s	10	1.33x
💻 Local	Nitro	0.178s (+0.9%)	0.993s (~)	0.017s (+17.2% 🔺)	1.023s (~)	0.846s	10	1.66x
💻 Local	Express	0.184s (+3.7%)	0.992s (~)	0.016s (+5.2% 🔺)	1.024s (~)	0.839s	10	1.72x
🌐 Turso	Next.js (Turbopack)	0.464s (-9.5% 🟢)	0.978s (+4.7%)	0.000s (+Infinity% 🔺)	1.013s (~)	0.550s	10	4.33x
🌐 MongoDB	Next.js (Turbopack)	0.508s (-3.9%)	0.937s (+1.9%)	0.000s (~)	1.014s (~)	0.506s	10	4.75x
🐘 Postgres	Nitro	1.385s (-39.5% 🟢)	1.647s (-40.1% 🟢)	0.000s (-100.0% 🟢)	2.011s (-33.3% 🟢)	0.626s	10	12.95x
🐘 Postgres	Next.js (Turbopack)	1.397s (-4.1%)	1.700s (+2.2%)	0.000s (NaN%)	2.022s (~)	0.626s	10	13.05x
🐘 Postgres	Express	2.375s (+4.1%)	2.668s (-3.5%)	0.000s (+Infinity% 🔺)	3.014s (~)	0.639s	10	22.20x

▲ Production (Vercel)

World	Framework	Workflow Time	TTFB	Slurp	Wall Time	Overhead	Samples	vs Fastest
▲ Vercel	🥇 Express	2.751s (+8.0% 🔺)	3.198s (+4.1%)	0.481s (+4.3%)	4.126s (+4.5%)	1.375s	10	1.00x
▲ Vercel	Next.js (Turbopack)	2.795s (+7.8% 🔺)	3.217s (~)	0.535s (-60.0% 🟢)	4.183s (-16.4% 🟢)	1.389s	10	1.02x
▲ Vercel	Nitro	2.889s (+6.5% 🔺)	3.249s (+2.0%)	0.718s (+108.1% 🔺)	4.493s (+12.6% 🔺)	1.604s	10	1.05x

🔍 Observability: Express | Next.js (Turbopack) | Nitro

Summary

Fastest Framework by World

Winner determined by most benchmark wins

World	🥇 Fastest Framework	Wins
💻 Local	Next.js (Turbopack)	8/8
🐘 Postgres	Nitro	6/8
▲ Vercel	Nitro	5/8

Fastest World by Framework

Winner determined by most benchmark wins

Framework	🥇 Fastest World	Wins
Express	💻 Local	8/8
Next.js (Turbopack)	💻 Local	8/8
Nitro	💻 Local	8/8

Column Definitions

• Workflow Time: Runtime reported by workflow (completedAt - createdAt) - primary metric
• TTFB: Time to First Byte - time from workflow start until first stream byte received (stream benchmarks only)
• Slurp: Time from first byte to complete stream consumption (stream benchmarks only)
• Wall Time: Total testbench time (trigger workflow + poll for result)
• Overhead: Testbench overhead (Wall Time - Workflow Time)
• Samples: Number of benchmark iterations run
• vs Fastest: How much slower compared to the fastest configuration for this benchmark

Worlds:

• 💻 Local: In-memory filesystem world (local development)
• 🐘 Postgres: PostgreSQL database world (local development)
• ▲ Vercel: Vercel production/preview deployment
• 🌐 Starter: Community world (local development)
• 🌐 Turso: Community world (local development)
• 🌐 MongoDB: Community world (local development)
• 🌐 Redis: Community world (local development)
• 🌐 Jazz: Community world (local development)

---

📋 View full workflow run

[vercel-release-bot]

This PR was opened by the Changesets release GitHub action. When you're ready to do a release, you can merge this and the packages will be published to npm automatically. If you're not ready to do a release yet, that's fine, whenever you add more changesets to main, this PR will be updated.

⚠️⚠️⚠️⚠️⚠️⚠️

main is currently in pre mode so this branch has prereleases rather than normal releases. If you want to exit prereleases, run changeset pre exit on main.

⚠️⚠️⚠️⚠️⚠️⚠️

Releases

@workflow/ai@4.0.1-beta.38

Patch Changes

• #69525bfa52 Thanks @ctate! - Fix: Handle object-style finishReason for AI SDK v5/v6 compatibility

• Updated dependencies []:

  • workflow@4.0.1-beta.38

@workflow/cli@4.0.1-beta.38

Patch Changes

• #68480955e7 Thanks @VaguelySerious! - Allow opening UI without a valid local config detected, UI will show warning and watch folder

• Updated dependencies [f989613]:

  • @workflow/web@4.0.1-beta.22

@workflow/web@4.0.1-beta.22

Patch Changes

• #694f989613 Thanks @VaguelySerious! - Add error boundaries around tabs in run detail view

workflow@4.0.1-beta.38

Patch Changes

• Updated dependencies [80955e7]:
  • @workflow/cli@4.0.1-beta.38

@workflow/world-testing@4.0.1-beta.39

Patch Changes

• Updated dependencies [80955e7]:
  • @workflow/cli@4.0.1-beta.38
  • workflow@4.0.1-beta.38

[vercel]

The latest updates on your projects. Learn more about Vercel for GitHub.

Project	Deployment	Review	Updated (UTC)
example-nextjs-workflow-turbopack	Ready	Preview, Comment	Dec 28, 2025 5:03pm
example-nextjs-workflow-webpack	Ready	Preview, Comment	Dec 28, 2025 5:03pm
example-workflow	Ready	Preview, Comment	Dec 28, 2025 5:03pm
workbench-astro-workflow	Ready	Preview, Comment	Dec 28, 2025 5:03pm
workbench-express-workflow	Ready	Preview, Comment	Dec 28, 2025 5:03pm
workbench-fastify-workflow	Ready	Preview, Comment	Dec 28, 2025 5:03pm
workbench-hono-workflow	Ready	Preview, Comment	Dec 28, 2025 5:03pm
workbench-nitro-workflow	Ready	Preview, Comment	Dec 28, 2025 5:03pm
workbench-nuxt-workflow	Ready	Preview, Comment	Dec 28, 2025 5:03pm
workbench-sveltekit-workflow	Ready	Preview, Comment	Dec 28, 2025 5:03pm
workbench-vite-workflow	Ready	Preview, Comment	Dec 28, 2025 5:03pm
workflow-docs	Ready	Preview, Comment	Dec 28, 2025 5:03pm

[github-actions]

🧪 E2E Test Results

❌ Some tests failed

Summary

	Passed	Failed	Skipped	Total
✅ ▲ Vercel Production	286	0	11	297
❌ 💻 Local Development	236	26	8	270
✅ 📦 Local Production	262	0	8	270
✅ 🐘 Local Postgres	262	0	8	270
❌ 🪟 Windows	0	27	0	27
❌ 🌍 Community Worlds	80	40	0	120
Total	1126	93	35	1254

❌ Failed Tests

💻 Local Development (26 failed)

nuxt-stable (26 failed):

• addTenWorkflow
• addTenWorkflow
• promiseAllWorkflow
• promiseRaceWorkflow
• promiseAnyWorkflow
• readableStreamWorkflow
• hookWorkflow
• webhookWorkflow
• webhook route with invalid token
• sleepingWorkflow
• nullByteWorkflow
• workflowAndStepMetadataWorkflow
• outputStreamWorkflow
• outputStreamInsideStepWorkflow - getWritable() called inside step functions
• fetchWorkflow
• promiseRaceStressTestWorkflow
• retryAttemptCounterWorkflow
• retryableAndFatalErrorWorkflow
• stepDirectCallWorkflow - calling step functions directly outside workflow context
• crossFileErrorWorkflow - stack traces work across imported modules
• hookCleanupTestWorkflow - hook token reuse after workflow completion
• stepFunctionPassingWorkflow - step function references can be passed as arguments (without closure vars)
• stepFunctionWithClosureWorkflow - step function with closure variables passed as argument
• closureVariableWorkflow - nested step functions with closure variables
• spawnWorkflowFromStepWorkflow - spawning a child workflow using start() inside a step
• health check endpoint - workflow and step endpoints respond to __health query parameter

🪟 Windows (27 failed)

nextjs-turbopack (27 failed):

• addTenWorkflow
• addTenWorkflow
• should work with react rendering in step
• promiseAllWorkflow
• promiseRaceWorkflow
• promiseAnyWorkflow
• readableStreamWorkflow
• hookWorkflow
• webhookWorkflow
• webhook route with invalid token
• sleepingWorkflow
• nullByteWorkflow
• workflowAndStepMetadataWorkflow
• outputStreamWorkflow
• outputStreamInsideStepWorkflow - getWritable() called inside step functions
• fetchWorkflow
• promiseRaceStressTestWorkflow
• retryAttemptCounterWorkflow
• retryableAndFatalErrorWorkflow
• stepDirectCallWorkflow - calling step functions directly outside workflow context
• crossFileErrorWorkflow - stack traces work across imported modules
• hookCleanupTestWorkflow - hook token reuse after workflow completion
• stepFunctionPassingWorkflow - step function references can be passed as arguments (without closure vars)
• stepFunctionWithClosureWorkflow - step function with closure variables passed as argument
• closureVariableWorkflow - nested step functions with closure variables
• spawnWorkflowFromStepWorkflow - spawning a child workflow using start() inside a step
• health check endpoint - workflow and step endpoints respond to __health query parameter

🌍 Community Worlds (40 failed)

mongodb-dev (3 failed):

• dev e2e should rebuild on step change
• dev e2e should rebuild on workflow change
• dev e2e should rebuild on adding workflow file

mongodb (27 failed):

• addTenWorkflow
• addTenWorkflow
• should work with react rendering in step
• promiseAllWorkflow
• promiseRaceWorkflow
• promiseAnyWorkflow
• readableStreamWorkflow
• hookWorkflow
• webhookWorkflow
• webhook route with invalid token
• sleepingWorkflow
• nullByteWorkflow
• workflowAndStepMetadataWorkflow
• outputStreamWorkflow
• outputStreamInsideStepWorkflow - getWritable() called inside step functions
• fetchWorkflow
• promiseRaceStressTestWorkflow
• retryAttemptCounterWorkflow
• retryableAndFatalErrorWorkflow
• stepDirectCallWorkflow - calling step functions directly outside workflow context
• crossFileErrorWorkflow - stack traces work across imported modules
• hookCleanupTestWorkflow - hook token reuse after workflow completion
• stepFunctionPassingWorkflow - step function references can be passed as arguments (without closure vars)
• stepFunctionWithClosureWorkflow - step function with closure variables passed as argument
• closureVariableWorkflow - nested step functions with closure variables
• spawnWorkflowFromStepWorkflow - spawning a child workflow using start() inside a step
• health check endpoint - workflow and step endpoints respond to __health query parameter

redis (1 failed):

• webhookWorkflow

starter (8 failed):

• addTenWorkflow
• addTenWorkflow
• retryAttemptCounterWorkflow
• crossFileErrorWorkflow - stack traces work across imported modules
• hookCleanupTestWorkflow - hook token reuse after workflow completion
• stepFunctionPassingWorkflow - step function references can be passed as arguments (without closure vars)
• stepFunctionWithClosureWorkflow - step function with closure variables passed as argument
• spawnWorkflowFromStepWorkflow - spawning a child workflow using start() inside a step

turso (1 failed):

• webhookWorkflow

Details by Category

✅ ▲ Vercel Production

App	Passed	Failed	Skipped
✅ astro	26	0	1
✅ example	26	0	1
✅ express	26	0	1
✅ fastify	26	0	1
✅ hono	26	0	1
✅ nextjs-turbopack	26	0	1
✅ nextjs-webpack	26	0	1
✅ nitro	26	0	1
✅ nuxt	26	0	1
✅ sveltekit	26	0	1
✅ vite	26	0	1

❌ 💻 Local Development

App	Passed	Failed	Skipped
✅ astro-stable	26	0	1
✅ express-stable	26	0	1
✅ fastify-stable	26	0	1
✅ hono-stable	26	0	1
✅ nextjs-turbopack-stable	27	0	0
✅ nextjs-webpack-stable	27	0	0
✅ nitro-stable	26	0	1
❌ nuxt-stable	0	26	1
✅ sveltekit-stable	26	0	1
✅ vite-stable	26	0	1

✅ 📦 Local Production

App	Passed	Failed	Skipped
✅ astro-stable	26	0	1
✅ express-stable	26	0	1
✅ fastify-stable	26	0	1
✅ hono-stable	26	0	1
✅ nextjs-turbopack-stable	27	0	0
✅ nextjs-webpack-stable	27	0	0
✅ nitro-stable	26	0	1
✅ nuxt-stable	26	0	1
✅ sveltekit-stable	26	0	1
✅ vite-stable	26	0	1

✅ 🐘 Local Postgres

App	Passed	Failed	Skipped
✅ astro-stable	26	0	1
✅ express-stable	26	0	1
✅ fastify-stable	26	0	1
✅ hono-stable	26	0	1
✅ nextjs-turbopack-stable	27	0	0
✅ nextjs-webpack-stable	27	0	0
✅ nitro-stable	26	0	1
✅ nuxt-stable	26	0	1
✅ sveltekit-stable	26	0	1
✅ vite-stable	26	0	1

❌ 🪟 Windows

App	Passed	Failed	Skipped
❌ nextjs-turbopack	0	27	0

❌ 🌍 Community Worlds

App	Passed	Failed	Skipped
❌ mongodb-dev	0	3	0
❌ mongodb	0	27	0
✅ redis-dev	3	0	0
❌ redis	26	1	0
✅ starter-dev	3	0	0
❌ starter	19	8	0
✅ turso-dev	3	0	0
❌ turso	26	1	0

---

📋 View full workflow run

---

❌ Some E2E test jobs failed:

• Vercel Prod: success
• Local Dev: failure
• Local Prod: success
• Local Postgres: success
• Windows: success

Check the workflow run for details.

[github-actions]

📊 Benchmark Results

📈 Comparing against baseline from main branch. Green 🟢 = faster, Red 🔺 = slower.

workflow with no steps

💻 Local Development

World	Framework	Workflow Time	Wall Time	Overhead	Samples	vs Fastest
💻 Local	🥇 Next.js (Turbopack)	0.031s (-18.0% 🟢)	1.015s (~)	0.984s	10	1.00x
🌐 Starter	Next.js (Turbopack)	0.036s (+0.6%)	1.013s (~)	0.977s	10	1.17x
🌐 Redis	Next.js (Turbopack)	0.038s (-5.2% 🟢)	1.017s (~)	0.979s	10	1.24x
💻 Local	Nitro	0.043s (~)	1.008s (~)	0.964s	10	1.40x
💻 Local	Express	0.046s (+6.9% 🔺)	1.008s (~)	0.961s	10	1.50x
🌐 Turso	Next.js (Turbopack)	0.049s (-38.7% 🟢)	1.013s (~)	0.964s	10	1.59x
🌐 MongoDB	Next.js (Turbopack)	0.123s (+138.1% 🔺)	1.016s (~)	0.893s	10	3.97x
🐘 Postgres	Next.js (Turbopack)	0.290s (-18.3% 🟢)	1.021s (~)	0.730s	10	9.39x
🐘 Postgres	Nitro	0.304s (+1.8%)	1.012s (~)	0.709s	10	9.83x
🐘 Postgres	Express	0.326s (+11.1% 🔺)	1.014s (-0.6%)	0.688s	10	10.54x

▲ Production (Vercel)

World	Framework	Workflow Time	Wall Time	Overhead	Samples	vs Fastest
▲ Vercel	🥇 Nitro	0.545s (-7.2% 🟢)	1.667s (+12.0% 🔺)	1.122s	10	1.00x
▲ Vercel	Next.js (Turbopack)	0.559s (+4.6%)	1.397s (-13.4% 🟢)	0.839s	10	1.03x
▲ Vercel	Express	0.588s (+19.2% 🔺)	1.477s (+7.5% 🔺)	0.889s	10	1.08x

🔍 Observability: Nitro | Next.js (Turbopack) | Express

workflow with 1 step

💻 Local Development

World	Framework	Workflow Time	Wall Time	Overhead	Samples	vs Fastest
💻 Local	🥇 Next.js (Turbopack)	1.075s (-1.7%)	2.012s (~)	0.937s	10	1.00x
🌐 Starter	Next.js (Turbopack)	1.081s (~)	2.011s (~)	0.929s	10	1.01x
🌐 Redis	Next.js (Turbopack)	1.098s (~)	2.013s (~)	0.915s	10	1.02x
💻 Local	Nitro	1.114s (~)	2.006s (~)	0.891s	10	1.04x
💻 Local	Express	1.118s (~)	2.008s (~)	0.890s	10	1.04x
🌐 Turso	Next.js (Turbopack)	1.278s (-0.7%)	2.012s (~)	0.734s	10	1.19x
🌐 MongoDB	Next.js (Turbopack)	1.286s (-0.6%)	2.014s (~)	0.728s	10	1.20x
🐘 Postgres	Nitro	1.820s (-15.6% 🟢)	2.312s (-23.3% 🟢)	0.492s	10	1.69x
🐘 Postgres	Next.js (Turbopack)	1.855s (-20.5% 🟢)	2.017s (-33.1% 🟢)	0.162s	10	1.73x
🐘 Postgres	Express	2.160s (~)	3.015s (~)	0.855s	10	2.01x

▲ Production (Vercel)

World	Framework	Workflow Time	Wall Time	Overhead	Samples	vs Fastest
▲ Vercel	🥇 Next.js (Turbopack)	2.699s (+0.8%)	3.643s (-1.1%)	0.944s	10	1.00x
▲ Vercel	Nitro	2.707s (+8.7% 🔺)	3.680s (+1.7%)	0.974s	10	1.00x
▲ Vercel	Express	2.843s (+5.2% 🔺)	3.811s (+5.8% 🔺)	0.968s	10	1.05x

🔍 Observability: Next.js (Turbopack) | Nitro | Express

workflow with 10 sequential steps

💻 Local Development

World	Framework	Workflow Time	Wall Time	Overhead	Samples	vs Fastest
💻 Local	🥇 Next.js (Turbopack)	10.523s (-1.1%)	11.016s (~)	0.493s	5	1.00x
🌐 Starter	Next.js (Turbopack)	10.598s (~)	11.012s (~)	0.414s	5	1.01x
🌐 Redis	Next.js (Turbopack)	10.673s (~)	11.018s (~)	0.346s	5	1.01x
💻 Local	Nitro	10.789s (~)	11.012s (~)	0.224s	5	1.03x
💻 Local	Express	10.810s (~)	11.017s (~)	0.207s	5	1.03x
🌐 MongoDB	Next.js (Turbopack)	11.921s (-2.2%)	12.428s (-4.5%)	0.507s	5	1.13x
🌐 Turso	Next.js (Turbopack)	12.183s (~)	13.023s (~)	0.840s	5	1.16x
🐘 Postgres	Next.js (Turbopack)	15.190s (-13.5% 🟢)	16.039s (-12.1% 🟢)	0.848s	5	1.44x
🐘 Postgres	Nitro	15.251s (-25.5% 🟢)	16.027s (-23.8% 🟢)	0.776s	5	1.45x
🐘 Postgres	Express	20.426s (~)	21.028s (~)	0.602s	5	1.94x

▲ Production (Vercel)

World	Framework	Workflow Time	Wall Time	Overhead	Samples	vs Fastest
▲ Vercel	🥇 Nitro	21.507s (+1.3%)	22.528s (+2.4%)	1.021s	5	1.00x
▲ Vercel	Next.js (Turbopack)	21.614s (~)	22.343s (-0.7%)	0.730s	5	1.00x
▲ Vercel	Express	22.161s (+4.2%)	23.050s (+4.9%)	0.889s	5	1.03x

🔍 Observability: Nitro | Next.js (Turbopack) | Express

Promise.all with 10 concurrent steps

💻 Local Development

World	Framework	Workflow Time	Wall Time	Overhead	Samples	vs Fastest
💻 Local	🥇 Next.js (Turbopack)	1.335s (-4.8%)	2.012s (~)	0.677s	15	1.00x
🌐 Starter	Next.js (Turbopack)	1.345s (+0.6%)	2.008s (~)	0.663s	15	1.01x
🌐 Redis	Next.js (Turbopack)	1.363s (-0.6%)	2.010s (~)	0.647s	15	1.02x
💻 Local	Nitro	1.411s (~)	2.005s (~)	0.593s	15	1.06x
💻 Local	Express	1.428s (+1.1%)	2.007s (~)	0.578s	15	1.07x
🐘 Postgres	Nitro	1.924s (-19.0% 🟢)	2.078s (-31.0% 🟢)	0.154s	15	1.44x
🌐 Turso	Next.js (Turbopack)	2.115s (~)	3.016s (~)	0.901s	10	1.58x
🌐 MongoDB	Next.js (Turbopack)	2.133s (-1.2%)	3.014s (~)	0.881s	10	1.60x
🐘 Postgres	Next.js (Turbopack)	2.199s (+12.1% 🔺)	2.597s (+24.9% 🔺)	0.399s	12	1.65x
🐘 Postgres	Express	2.473s (+4.3%)	3.013s (~)	0.539s	10	1.85x

▲ Production (Vercel)

World	Framework	Workflow Time	Wall Time	Overhead	Samples	vs Fastest
▲ Vercel	🥇 Nitro	2.863s (+1.5%)	3.926s (+2.2%)	1.063s	8	1.00x
▲ Vercel	Next.js (Turbopack)	3.116s (+5.9% 🔺)	3.779s (-3.5%)	0.663s	8	1.09x
▲ Vercel	Express	3.295s (+22.6% 🔺)	4.156s (+15.3% 🔺)	0.861s	8	1.15x

🔍 Observability: Nitro | Next.js (Turbopack) | Express

Promise.all with 25 concurrent steps

💻 Local Development

World	Framework	Workflow Time	Wall Time	Overhead	Samples	vs Fastest
💻 Local	🥇 Next.js (Turbopack)	2.036s (-0.8%)	2.769s (-4.7%)	0.733s	11	1.00x
💻 Local	Nitro	2.222s (-1.1%)	3.150s (-1.3%)	0.928s	10	1.09x
💻 Local	Express	2.320s (+3.6%)	3.219s (+1.2%)	0.899s	10	1.14x
🌐 Starter	Next.js (Turbopack)	2.463s (~)	3.008s (~)	0.545s	10	1.21x
🌐 Redis	Next.js (Turbopack)	2.507s (+0.6%)	3.013s (~)	0.506s	10	1.23x
🐘 Postgres	Nitro	2.650s (-9.5% 🟢)	3.011s (-9.3% 🟢)	0.362s	10	1.30x
🐘 Postgres	Next.js (Turbopack)	2.650s (-0.6%)	3.014s (~)	0.364s	10	1.30x
🐘 Postgres	Express	2.842s (-7.1% 🟢)	3.011s (-18.6% 🟢)	0.169s	10	1.40x
🌐 MongoDB	Next.js (Turbopack)	4.680s (+2.3%)	5.182s (~)	0.502s	6	2.30x
🌐 Turso	Next.js (Turbopack)	4.709s (+1.7%)	5.185s (~)	0.476s	6	2.31x

▲ Production (Vercel)

World	Framework	Workflow Time	Wall Time	Overhead	Samples	vs Fastest
▲ Vercel	🥇 Express	3.074s (-7.4% 🟢)	3.726s (-5.5% 🟢)	0.652s	9	1.00x
▲ Vercel	Nitro	3.320s (-7.5% 🟢)	3.837s (-9.1% 🟢)	0.517s	8	1.08x
▲ Vercel	Next.js (Turbopack)	3.490s (-6.7% 🟢)	4.287s (-1.0%)	0.797s	7	1.14x

🔍 Observability: Express | Nitro | Next.js (Turbopack)

Promise.race with 10 concurrent steps

💻 Local Development

World	Framework	Workflow Time	Wall Time	Overhead	Samples	vs Fastest
💻 Local	🥇 Next.js (Turbopack)	1.359s (-1.3%)	2.012s (~)	0.654s	15	1.00x
🌐 Starter	Next.js (Turbopack)	1.359s (-0.9%)	2.007s (~)	0.648s	15	1.00x
🌐 Redis	Next.js (Turbopack)	1.367s (~)	2.009s (~)	0.642s	15	1.01x
💻 Local	Nitro	1.447s (+2.6%)	2.005s (~)	0.557s	15	1.07x
💻 Local	Express	1.450s (+1.5%)	2.006s (~)	0.555s	15	1.07x
🐘 Postgres	Nitro	1.798s (-9.1% 🟢)	2.009s (-6.8% 🟢)	0.210s	15	1.32x
🐘 Postgres	Next.js (Turbopack)	1.832s (+4.2%)	2.012s (~)	0.180s	15	1.35x
🐘 Postgres	Express	2.031s (+7.0% 🔺)	2.522s (+21.4% 🔺)	0.492s	12	1.49x
🌐 MongoDB	Next.js (Turbopack)	2.127s (~)	3.013s (~)	0.886s	10	1.57x
🌐 Turso	Next.js (Turbopack)	2.151s (+1.3%)	3.015s (~)	0.864s	10	1.58x

▲ Production (Vercel)

World	Framework	Workflow Time	Wall Time	Overhead	Samples	vs Fastest
▲ Vercel	🥇 Nitro	2.708s (~)	3.822s (+1.3%)	1.115s	8	1.00x
▲ Vercel	Express	2.888s (+9.6% 🔺)	3.577s (+1.6%)	0.689s	9	1.07x
▲ Vercel	Next.js (Turbopack)	3.025s (+7.4% 🔺)	3.790s (-2.7%)	0.765s	8	1.12x

🔍 Observability: Nitro | Express | Next.js (Turbopack)

Promise.race with 25 concurrent steps

💻 Local Development

World	Framework	Workflow Time	Wall Time	Overhead	Samples	vs Fastest
💻 Local	🥇 Next.js (Turbopack)	2.016s (-5.7% 🟢)	2.556s (-14.2% 🟢)	0.539s	12	1.00x
💻 Local	Nitro	2.240s (-0.9%)	3.181s (-1.0%)	0.940s	10	1.11x
💻 Local	Express	2.393s (+2.8%)	3.292s (+0.7%)	0.899s	10	1.19x
🌐 Redis	Next.js (Turbopack)	2.468s (~)	3.011s (~)	0.543s	10	1.22x
🌐 Starter	Next.js (Turbopack)	2.476s (+1.2%)	3.012s (~)	0.536s	10	1.23x
🐘 Postgres	Nitro	2.625s (+1.7%)	3.017s (~)	0.392s	10	1.30x
🐘 Postgres	Next.js (Turbopack)	2.718s (+10.8% 🔺)	3.022s (~)	0.304s	10	1.35x
🐘 Postgres	Express	2.789s (+1.6%)	3.014s (~)	0.226s	10	1.38x
🌐 Turso	Next.js (Turbopack)	4.675s (-3.3%)	5.188s (-3.0%)	0.513s	6	2.32x
🌐 MongoDB	Next.js (Turbopack)	4.689s (-2.0%)	5.183s (~)	0.494s	6	2.33x

▲ Production (Vercel)

World	Framework	Workflow Time	Wall Time	Overhead	Samples	vs Fastest
▲ Vercel	🥇 Nitro	2.932s (-8.4% 🟢)	3.706s (-4.7%)	0.774s	9	1.00x
▲ Vercel	Next.js (Turbopack)	2.993s (-3.0%)	3.796s (-2.1%)	0.803s	9	1.02x
▲ Vercel	Express	3.069s (-4.7%)	3.698s (~)	0.629s	9	1.05x

🔍 Observability: Nitro | Next.js (Turbopack) | Express

Stream Benchmarks(includes TTFB metrics)

workflow with stream

💻 Local Development

World	Framework	Workflow Time	TTFB	Slurp	Wall Time	Overhead	Samples	vs Fastest
💻 Local	🥇 Next.js (Turbopack)	0.107s (-24.2% 🟢)	1.003s (~)	0.023s (+41.0% 🔺)	1.034s (+0.7%)	0.927s	10	1.00x
🌐 Starter	Next.js (Turbopack)	0.130s (+1.2%)	1.005s (~)	0.000s (~)	1.011s (~)	0.881s	10	1.21x
🌐 Redis	Next.js (Turbopack)	0.142s (-3.0%)	1.005s (~)	0.000s (+Infinity% 🔺)	1.014s (~)	0.871s	10	1.33x
💻 Local	Nitro	0.178s (+0.9%)	0.993s (~)	0.017s (+17.2% 🔺)	1.023s (~)	0.846s	10	1.66x
💻 Local	Express	0.184s (+3.7%)	0.992s (~)	0.016s (+5.2% 🔺)	1.024s (~)	0.839s	10	1.72x
🌐 Turso	Next.js (Turbopack)	0.464s (-9.5% 🟢)	0.978s (+4.7%)	0.000s (+Infinity% 🔺)	1.013s (~)	0.550s	10	4.33x
🌐 MongoDB	Next.js (Turbopack)	0.508s (-3.9%)	0.937s (+1.9%)	0.000s (~)	1.014s (~)	0.506s	10	4.75x
🐘 Postgres	Nitro	1.385s (-39.5% 🟢)	1.647s (-40.1% 🟢)	0.000s (-100.0% 🟢)	2.011s (-33.3% 🟢)	0.626s	10	12.95x
🐘 Postgres	Next.js (Turbopack)	1.397s (-4.1%)	1.700s (+2.2%)	0.000s (NaN%)	2.022s (~)	0.626s	10	13.05x
🐘 Postgres	Express	2.375s (+4.1%)	2.668s (-3.5%)	0.000s (+Infinity% 🔺)	3.014s (~)	0.639s	10	22.20x

▲ Production (Vercel)

World	Framework	Workflow Time	TTFB	Slurp	Wall Time	Overhead	Samples	vs Fastest
▲ Vercel	🥇 Express	2.751s (+8.0% 🔺)	3.198s (+4.1%)	0.481s (+4.3%)	4.126s (+4.5%)	1.375s	10	1.00x
▲ Vercel	Next.js (Turbopack)	2.795s (+7.8% 🔺)	3.217s (~)	0.535s (-60.0% 🟢)	4.183s (-16.4% 🟢)	1.389s	10	1.02x
▲ Vercel	Nitro	2.889s (+6.5% 🔺)	3.249s (+2.0%)	0.718s (+108.1% 🔺)	4.493s (+12.6% 🔺)	1.604s	10	1.05x

🔍 Observability: Express | Next.js (Turbopack) | Nitro

Summary

Fastest Framework by World

Winner determined by most benchmark wins

World	🥇 Fastest Framework	Wins
💻 Local	Next.js (Turbopack)	8/8
🐘 Postgres	Nitro	6/8
▲ Vercel	Nitro	5/8

Fastest World by Framework

Winner determined by most benchmark wins

Framework	🥇 Fastest World	Wins
Express	💻 Local	8/8
Next.js (Turbopack)	💻 Local	8/8
Nitro	💻 Local	8/8

Column Definitions

• Workflow Time: Runtime reported by workflow (completedAt - createdAt) - primary metric
• TTFB: Time to First Byte - time from workflow start until first stream byte received (stream benchmarks only)
• Slurp: Time from first byte to complete stream consumption (stream benchmarks only)
• Wall Time: Total testbench time (trigger workflow + poll for result)
• Overhead: Testbench overhead (Wall Time - Workflow Time)
• Samples: Number of benchmark iterations run
• vs Fastest: How much slower compared to the fastest configuration for this benchmark

Worlds:

• 💻 Local: In-memory filesystem world (local development)
• 🐘 Postgres: PostgreSQL database world (local development)
• ▲ Vercel: Vercel production/preview deployment
• 🌐 Starter: Community world (local development)
• 🌐 Turso: Community world (local development)
• 🌐 MongoDB: Community world (local development)
• 🌐 Redis: Community world (local development)
• 🌐 Jazz: Community world (local development)

---

📋 View full workflow run

[vercel-release-bot]

This PR was opened by the Changesets release GitHub action. When you're ready to do a release, you can merge this and the packages will be published to npm automatically. If you're not ready to do a release yet, that's fine, whenever you add more changesets to main, this PR will be updated.

⚠️⚠️⚠️⚠️⚠️⚠️

main is currently in pre mode so this branch has prereleases rather than normal releases. If you want to exit prereleases, run changeset pre exit on main.

⚠️⚠️⚠️⚠️⚠️⚠️

Releases

@workflow/ai@4.0.1-beta.38

Patch Changes

• #69525bfa52 Thanks @ctate! - Fix: Handle object-style finishReason for AI SDK v5/v6 compatibility

• Updated dependencies []:

  • workflow@4.0.1-beta.38

@workflow/cli@4.0.1-beta.38

Patch Changes

• #68480955e7 Thanks @VaguelySerious! - Allow opening UI without a valid local config detected, UI will show warning and watch folder

• Updated dependencies [f989613]:

  • @workflow/web@4.0.1-beta.22

@workflow/web@4.0.1-beta.22

Patch Changes

• #694f989613 Thanks @VaguelySerious! - Add error boundaries around tabs in run detail view

workflow@4.0.1-beta.38

Patch Changes

• Updated dependencies [80955e7]:
  • @workflow/cli@4.0.1-beta.38

@workflow/world-testing@4.0.1-beta.39

Patch Changes

• Updated dependencies [80955e7]:
  • @workflow/cli@4.0.1-beta.38
  • workflow@4.0.1-beta.38

[vercel]

The latest updates on your projects. Learn more about Vercel for GitHub.

Project	Deployment	Review	Updated (UTC)
example-nextjs-workflow-turbopack	Ready	Preview, Comment	Dec 28, 2025 5:03pm
example-nextjs-workflow-webpack	Ready	Preview, Comment	Dec 28, 2025 5:03pm
example-workflow	Ready	Preview, Comment	Dec 28, 2025 5:03pm
workbench-astro-workflow	Ready	Preview, Comment	Dec 28, 2025 5:03pm
workbench-express-workflow	Ready	Preview, Comment	Dec 28, 2025 5:03pm
workbench-fastify-workflow	Ready	Preview, Comment	Dec 28, 2025 5:03pm
workbench-hono-workflow	Ready	Preview, Comment	Dec 28, 2025 5:03pm
workbench-nitro-workflow	Ready	Preview, Comment	Dec 28, 2025 5:03pm
workbench-nuxt-workflow	Ready	Preview, Comment	Dec 28, 2025 5:03pm
workbench-sveltekit-workflow	Ready	Preview, Comment	Dec 28, 2025 5:03pm
workbench-vite-workflow	Ready	Preview, Comment	Dec 28, 2025 5:03pm
workflow-docs	Ready	Preview, Comment	Dec 28, 2025 5:03pm

[github-actions]

🧪 E2E Test Results

❌ Some tests failed

Summary

	Passed	Failed	Skipped	Total
✅ ▲ Vercel Production	286	0	11	297
❌ 💻 Local Development	236	26	8	270
✅ 📦 Local Production	262	0	8	270
✅ 🐘 Local Postgres	262	0	8	270
❌ 🪟 Windows	0	27	0	27
❌ 🌍 Community Worlds	80	40	0	120
Total	1126	93	35	1254

❌ Failed Tests

💻 Local Development (26 failed)

nuxt-stable (26 failed):

• addTenWorkflow
• addTenWorkflow
• promiseAllWorkflow
• promiseRaceWorkflow
• promiseAnyWorkflow
• readableStreamWorkflow
• hookWorkflow
• webhookWorkflow
• webhook route with invalid token
• sleepingWorkflow
• nullByteWorkflow
• workflowAndStepMetadataWorkflow
• outputStreamWorkflow
• outputStreamInsideStepWorkflow - getWritable() called inside step functions
• fetchWorkflow
• promiseRaceStressTestWorkflow
• retryAttemptCounterWorkflow
• retryableAndFatalErrorWorkflow
• stepDirectCallWorkflow - calling step functions directly outside workflow context
• crossFileErrorWorkflow - stack traces work across imported modules
• hookCleanupTestWorkflow - hook token reuse after workflow completion
• stepFunctionPassingWorkflow - step function references can be passed as arguments (without closure vars)
• stepFunctionWithClosureWorkflow - step function with closure variables passed as argument
• closureVariableWorkflow - nested step functions with closure variables
• spawnWorkflowFromStepWorkflow - spawning a child workflow using start() inside a step
• health check endpoint - workflow and step endpoints respond to __health query parameter

🪟 Windows (27 failed)

nextjs-turbopack (27 failed):

• addTenWorkflow
• addTenWorkflow
• should work with react rendering in step
• promiseAllWorkflow
• promiseRaceWorkflow
• promiseAnyWorkflow
• readableStreamWorkflow
• hookWorkflow
• webhookWorkflow
• webhook route with invalid token
• sleepingWorkflow
• nullByteWorkflow
• workflowAndStepMetadataWorkflow
• outputStreamWorkflow
• outputStreamInsideStepWorkflow - getWritable() called inside step functions
• fetchWorkflow
• promiseRaceStressTestWorkflow
• retryAttemptCounterWorkflow
• retryableAndFatalErrorWorkflow
• stepDirectCallWorkflow - calling step functions directly outside workflow context
• crossFileErrorWorkflow - stack traces work across imported modules
• hookCleanupTestWorkflow - hook token reuse after workflow completion
• stepFunctionPassingWorkflow - step function references can be passed as arguments (without closure vars)
• stepFunctionWithClosureWorkflow - step function with closure variables passed as argument
• closureVariableWorkflow - nested step functions with closure variables
• spawnWorkflowFromStepWorkflow - spawning a child workflow using start() inside a step
• health check endpoint - workflow and step endpoints respond to __health query parameter

🌍 Community Worlds (40 failed)

mongodb-dev (3 failed):

• dev e2e should rebuild on step change
• dev e2e should rebuild on workflow change
• dev e2e should rebuild on adding workflow file

mongodb (27 failed):

• addTenWorkflow
• addTenWorkflow
• should work with react rendering in step
• promiseAllWorkflow
• promiseRaceWorkflow
• promiseAnyWorkflow
• readableStreamWorkflow
• hookWorkflow
• webhookWorkflow
• webhook route with invalid token
• sleepingWorkflow
• nullByteWorkflow
• workflowAndStepMetadataWorkflow
• outputStreamWorkflow
• outputStreamInsideStepWorkflow - getWritable() called inside step functions
• fetchWorkflow
• promiseRaceStressTestWorkflow
• retryAttemptCounterWorkflow
• retryableAndFatalErrorWorkflow
• stepDirectCallWorkflow - calling step functions directly outside workflow context
• crossFileErrorWorkflow - stack traces work across imported modules
• hookCleanupTestWorkflow - hook token reuse after workflow completion
• stepFunctionPassingWorkflow - step function references can be passed as arguments (without closure vars)
• stepFunctionWithClosureWorkflow - step function with closure variables passed as argument
• closureVariableWorkflow - nested step functions with closure variables
• spawnWorkflowFromStepWorkflow - spawning a child workflow using start() inside a step
• health check endpoint - workflow and step endpoints respond to __health query parameter

redis (1 failed):

• webhookWorkflow

starter (8 failed):

• addTenWorkflow
• addTenWorkflow
• retryAttemptCounterWorkflow
• crossFileErrorWorkflow - stack traces work across imported modules
• hookCleanupTestWorkflow - hook token reuse after workflow completion
• stepFunctionPassingWorkflow - step function references can be passed as arguments (without closure vars)
• stepFunctionWithClosureWorkflow - step function with closure variables passed as argument
• spawnWorkflowFromStepWorkflow - spawning a child workflow using start() inside a step

turso (1 failed):

• webhookWorkflow

Details by Category

✅ ▲ Vercel Production

App	Passed	Failed	Skipped
✅ astro	26	0	1
✅ example	26	0	1
✅ express	26	0	1
✅ fastify	26	0	1
✅ hono	26	0	1
✅ nextjs-turbopack	26	0	1
✅ nextjs-webpack	26	0	1
✅ nitro	26	0	1
✅ nuxt	26	0	1
✅ sveltekit	26	0	1
✅ vite	26	0	1

❌ 💻 Local Development

App	Passed	Failed	Skipped
✅ astro-stable	26	0	1
✅ express-stable	26	0	1
✅ fastify-stable	26	0	1
✅ hono-stable	26	0	1
✅ nextjs-turbopack-stable	27	0	0
✅ nextjs-webpack-stable	27	0	0
✅ nitro-stable	26	0	1
❌ nuxt-stable	0	26	1
✅ sveltekit-stable	26	0	1
✅ vite-stable	26	0	1

✅ 📦 Local Production

App	Passed	Failed	Skipped
✅ astro-stable	26	0	1
✅ express-stable	26	0	1
✅ fastify-stable	26	0	1
✅ hono-stable	26	0	1
✅ nextjs-turbopack-stable	27	0	0
✅ nextjs-webpack-stable	27	0	0
✅ nitro-stable	26	0	1
✅ nuxt-stable	26	0	1
✅ sveltekit-stable	26	0	1
✅ vite-stable	26	0	1

✅ 🐘 Local Postgres

App	Passed	Failed	Skipped
✅ astro-stable	26	0	1
✅ express-stable	26	0	1
✅ fastify-stable	26	0	1
✅ hono-stable	26	0	1
✅ nextjs-turbopack-stable	27	0	0
✅ nextjs-webpack-stable	27	0	0
✅ nitro-stable	26	0	1
✅ nuxt-stable	26	0	1
✅ sveltekit-stable	26	0	1
✅ vite-stable	26	0	1

❌ 🪟 Windows

App	Passed	Failed	Skipped
❌ nextjs-turbopack	0	27	0

❌ 🌍 Community Worlds

App	Passed	Failed	Skipped
❌ mongodb-dev	0	3	0
❌ mongodb	0	27	0
✅ redis-dev	3	0	0
❌ redis	26	1	0
✅ starter-dev	3	0	0
❌ starter	19	8	0
✅ turso-dev	3	0	0
❌ turso	26	1	0

---

📋 View full workflow run

---

❌ Some E2E test jobs failed:

• Vercel Prod: success
• Local Dev: failure
• Local Prod: success
• Local Postgres: success
• Windows: success

Check the workflow run for details.

[github-actions]

📊 Benchmark Results

📈 Comparing against baseline from main branch. Green 🟢 = faster, Red 🔺 = slower.

workflow with no steps

💻 Local Development

World	Framework	Workflow Time	Wall Time	Overhead	Samples	vs Fastest
💻 Local	🥇 Next.js (Turbopack)	0.031s (-18.0% 🟢)	1.015s (~)	0.984s	10	1.00x
🌐 Starter	Next.js (Turbopack)	0.036s (+0.6%)	1.013s (~)	0.977s	10	1.17x
🌐 Redis	Next.js (Turbopack)	0.038s (-5.2% 🟢)	1.017s (~)	0.979s	10	1.24x
💻 Local	Nitro	0.043s (~)	1.008s (~)	0.964s	10	1.40x
💻 Local	Express	0.046s (+6.9% 🔺)	1.008s (~)	0.961s	10	1.50x
🌐 Turso	Next.js (Turbopack)	0.049s (-38.7% 🟢)	1.013s (~)	0.964s	10	1.59x
🌐 MongoDB	Next.js (Turbopack)	0.123s (+138.1% 🔺)	1.016s (~)	0.893s	10	3.97x
🐘 Postgres	Next.js (Turbopack)	0.290s (-18.3% 🟢)	1.021s (~)	0.730s	10	9.39x
🐘 Postgres	Nitro	0.304s (+1.8%)	1.012s (~)	0.709s	10	9.83x
🐘 Postgres	Express	0.326s (+11.1% 🔺)	1.014s (-0.6%)	0.688s	10	10.54x

▲ Production (Vercel)

World	Framework	Workflow Time	Wall Time	Overhead	Samples	vs Fastest
▲ Vercel	🥇 Nitro	0.545s (-7.2% 🟢)	1.667s (+12.0% 🔺)	1.122s	10	1.00x
▲ Vercel	Next.js (Turbopack)	0.559s (+4.6%)	1.397s (-13.4% 🟢)	0.839s	10	1.03x
▲ Vercel	Express	0.588s (+19.2% 🔺)	1.477s (+7.5% 🔺)	0.889s	10	1.08x

🔍 Observability: Nitro | Next.js (Turbopack) | Express

workflow with 1 step

💻 Local Development

World	Framework	Workflow Time	Wall Time	Overhead	Samples	vs Fastest
💻 Local	🥇 Next.js (Turbopack)	1.075s (-1.7%)	2.012s (~)	0.937s	10	1.00x
🌐 Starter	Next.js (Turbopack)	1.081s (~)	2.011s (~)	0.929s	10	1.01x
🌐 Redis	Next.js (Turbopack)	1.098s (~)	2.013s (~)	0.915s	10	1.02x
💻 Local	Nitro	1.114s (~)	2.006s (~)	0.891s	10	1.04x
💻 Local	Express	1.118s (~)	2.008s (~)	0.890s	10	1.04x
🌐 Turso	Next.js (Turbopack)	1.278s (-0.7%)	2.012s (~)	0.734s	10	1.19x
🌐 MongoDB	Next.js (Turbopack)	1.286s (-0.6%)	2.014s (~)	0.728s	10	1.20x
🐘 Postgres	Nitro	1.820s (-15.6% 🟢)	2.312s (-23.3% 🟢)	0.492s	10	1.69x
🐘 Postgres	Next.js (Turbopack)	1.855s (-20.5% 🟢)	2.017s (-33.1% 🟢)	0.162s	10	1.73x
🐘 Postgres	Express	2.160s (~)	3.015s (~)	0.855s	10	2.01x

▲ Production (Vercel)

World	Framework	Workflow Time	Wall Time	Overhead	Samples	vs Fastest
▲ Vercel	🥇 Next.js (Turbopack)	2.699s (+0.8%)	3.643s (-1.1%)	0.944s	10	1.00x
▲ Vercel	Nitro	2.707s (+8.7% 🔺)	3.680s (+1.7%)	0.974s	10	1.00x
▲ Vercel	Express	2.843s (+5.2% 🔺)	3.811s (+5.8% 🔺)	0.968s	10	1.05x

🔍 Observability: Next.js (Turbopack) | Nitro | Express

workflow with 10 sequential steps

💻 Local Development

World	Framework	Workflow Time	Wall Time	Overhead	Samples	vs Fastest
💻 Local	🥇 Next.js (Turbopack)	10.523s (-1.1%)	11.016s (~)	0.493s	5	1.00x
🌐 Starter	Next.js (Turbopack)	10.598s (~)	11.012s (~)	0.414s	5	1.01x
🌐 Redis	Next.js (Turbopack)	10.673s (~)	11.018s (~)	0.346s	5	1.01x
💻 Local	Nitro	10.789s (~)	11.012s (~)	0.224s	5	1.03x
💻 Local	Express	10.810s (~)	11.017s (~)	0.207s	5	1.03x
🌐 MongoDB	Next.js (Turbopack)	11.921s (-2.2%)	12.428s (-4.5%)	0.507s	5	1.13x
🌐 Turso	Next.js (Turbopack)	12.183s (~)	13.023s (~)	0.840s	5	1.16x
🐘 Postgres	Next.js (Turbopack)	15.190s (-13.5% 🟢)	16.039s (-12.1% 🟢)	0.848s	5	1.44x
🐘 Postgres	Nitro	15.251s (-25.5% 🟢)	16.027s (-23.8% 🟢)	0.776s	5	1.45x
🐘 Postgres	Express	20.426s (~)	21.028s (~)	0.602s	5	1.94x

▲ Production (Vercel)

World	Framework	Workflow Time	Wall Time	Overhead	Samples	vs Fastest
▲ Vercel	🥇 Nitro	21.507s (+1.3%)	22.528s (+2.4%)	1.021s	5	1.00x
▲ Vercel	Next.js (Turbopack)	21.614s (~)	22.343s (-0.7%)	0.730s	5	1.00x
▲ Vercel	Express	22.161s (+4.2%)	23.050s (+4.9%)	0.889s	5	1.03x

🔍 Observability: Nitro | Next.js (Turbopack) | Express

Promise.all with 10 concurrent steps

💻 Local Development

World	Framework	Workflow Time	Wall Time	Overhead	Samples	vs Fastest
💻 Local	🥇 Next.js (Turbopack)	1.335s (-4.8%)	2.012s (~)	0.677s	15	1.00x
🌐 Starter	Next.js (Turbopack)	1.345s (+0.6%)	2.008s (~)	0.663s	15	1.01x
🌐 Redis	Next.js (Turbopack)	1.363s (-0.6%)	2.010s (~)	0.647s	15	1.02x
💻 Local	Nitro	1.411s (~)	2.005s (~)	0.593s	15	1.06x
💻 Local	Express	1.428s (+1.1%)	2.007s (~)	0.578s	15	1.07x
🐘 Postgres	Nitro	1.924s (-19.0% 🟢)	2.078s (-31.0% 🟢)	0.154s	15	1.44x
🌐 Turso	Next.js (Turbopack)	2.115s (~)	3.016s (~)	0.901s	10	1.58x
🌐 MongoDB	Next.js (Turbopack)	2.133s (-1.2%)	3.014s (~)	0.881s	10	1.60x
🐘 Postgres	Next.js (Turbopack)	2.199s (+12.1% 🔺)	2.597s (+24.9% 🔺)	0.399s	12	1.65x
🐘 Postgres	Express	2.473s (+4.3%)	3.013s (~)	0.539s	10	1.85x

▲ Production (Vercel)

World	Framework	Workflow Time	Wall Time	Overhead	Samples	vs Fastest
▲ Vercel	🥇 Nitro	2.863s (+1.5%)	3.926s (+2.2%)	1.063s	8	1.00x
▲ Vercel	Next.js (Turbopack)	3.116s (+5.9% 🔺)	3.779s (-3.5%)	0.663s	8	1.09x
▲ Vercel	Express	3.295s (+22.6% 🔺)	4.156s (+15.3% 🔺)	0.861s	8	1.15x

🔍 Observability: Nitro | Next.js (Turbopack) | Express

Promise.all with 25 concurrent steps

💻 Local Development

World	Framework	Workflow Time	Wall Time	Overhead	Samples	vs Fastest
💻 Local	🥇 Next.js (Turbopack)	2.036s (-0.8%)	2.769s (-4.7%)	0.733s	11	1.00x
💻 Local	Nitro	2.222s (-1.1%)	3.150s (-1.3%)	0.928s	10	1.09x
💻 Local	Express	2.320s (+3.6%)	3.219s (+1.2%)	0.899s	10	1.14x
🌐 Starter	Next.js (Turbopack)	2.463s (~)	3.008s (~)	0.545s	10	1.21x
🌐 Redis	Next.js (Turbopack)	2.507s (+0.6%)	3.013s (~)	0.506s	10	1.23x
🐘 Postgres	Nitro	2.650s (-9.5% 🟢)	3.011s (-9.3% 🟢)	0.362s	10	1.30x
🐘 Postgres	Next.js (Turbopack)	2.650s (-0.6%)	3.014s (~)	0.364s	10	1.30x
🐘 Postgres	Express	2.842s (-7.1% 🟢)	3.011s (-18.6% 🟢)	0.169s	10	1.40x
🌐 MongoDB	Next.js (Turbopack)	4.680s (+2.3%)	5.182s (~)	0.502s	6	2.30x
🌐 Turso	Next.js (Turbopack)	4.709s (+1.7%)	5.185s (~)	0.476s	6	2.31x

▲ Production (Vercel)

World	Framework	Workflow Time	Wall Time	Overhead	Samples	vs Fastest
▲ Vercel	🥇 Express	3.074s (-7.4% 🟢)	3.726s (-5.5% 🟢)	0.652s	9	1.00x
▲ Vercel	Nitro	3.320s (-7.5% 🟢)	3.837s (-9.1% 🟢)	0.517s	8	1.08x
▲ Vercel	Next.js (Turbopack)	3.490s (-6.7% 🟢)	4.287s (-1.0%)	0.797s	7	1.14x

🔍 Observability: Express | Nitro | Next.js (Turbopack)

Promise.race with 10 concurrent steps

💻 Local Development

World	Framework	Workflow Time	Wall Time	Overhead	Samples	vs Fastest
💻 Local	🥇 Next.js (Turbopack)	1.359s (-1.3%)	2.012s (~)	0.654s	15	1.00x
🌐 Starter	Next.js (Turbopack)	1.359s (-0.9%)	2.007s (~)	0.648s	15	1.00x
🌐 Redis	Next.js (Turbopack)	1.367s (~)	2.009s (~)	0.642s	15	1.01x
💻 Local	Nitro	1.447s (+2.6%)	2.005s (~)	0.557s	15	1.07x
💻 Local	Express	1.450s (+1.5%)	2.006s (~)	0.555s	15	1.07x
🐘 Postgres	Nitro	1.798s (-9.1% 🟢)	2.009s (-6.8% 🟢)	0.210s	15	1.32x
🐘 Postgres	Next.js (Turbopack)	1.832s (+4.2%)	2.012s (~)	0.180s	15	1.35x
🐘 Postgres	Express	2.031s (+7.0% 🔺)	2.522s (+21.4% 🔺)	0.492s	12	1.49x
🌐 MongoDB	Next.js (Turbopack)	2.127s (~)	3.013s (~)	0.886s	10	1.57x
🌐 Turso	Next.js (Turbopack)	2.151s (+1.3%)	3.015s (~)	0.864s	10	1.58x

▲ Production (Vercel)

World	Framework	Workflow Time	Wall Time	Overhead	Samples	vs Fastest
▲ Vercel	🥇 Nitro	2.708s (~)	3.822s (+1.3%)	1.115s	8	1.00x
▲ Vercel	Express	2.888s (+9.6% 🔺)	3.577s (+1.6%)	0.689s	9	1.07x
▲ Vercel	Next.js (Turbopack)	3.025s (+7.4% 🔺)	3.790s (-2.7%)	0.765s	8	1.12x

🔍 Observability: Nitro | Express | Next.js (Turbopack)

Promise.race with 25 concurrent steps

💻 Local Development

World	Framework	Workflow Time	Wall Time	Overhead	Samples	vs Fastest
💻 Local	🥇 Next.js (Turbopack)	2.016s (-5.7% 🟢)	2.556s (-14.2% 🟢)	0.539s	12	1.00x
💻 Local	Nitro	2.240s (-0.9%)	3.181s (-1.0%)	0.940s	10	1.11x
💻 Local	Express	2.393s (+2.8%)	3.292s (+0.7%)	0.899s	10	1.19x
🌐 Redis	Next.js (Turbopack)	2.468s (~)	3.011s (~)	0.543s	10	1.22x
🌐 Starter	Next.js (Turbopack)	2.476s (+1.2%)	3.012s (~)	0.536s	10	1.23x
🐘 Postgres	Nitro	2.625s (+1.7%)	3.017s (~)	0.392s	10	1.30x
🐘 Postgres	Next.js (Turbopack)	2.718s (+10.8% 🔺)	3.022s (~)	0.304s	10	1.35x
🐘 Postgres	Express	2.789s (+1.6%)	3.014s (~)	0.226s	10	1.38x
🌐 Turso	Next.js (Turbopack)	4.675s (-3.3%)	5.188s (-3.0%)	0.513s	6	2.32x
🌐 MongoDB	Next.js (Turbopack)	4.689s (-2.0%)	5.183s (~)	0.494s	6	2.33x

▲ Production (Vercel)

World	Framework	Workflow Time	Wall Time	Overhead	Samples	vs Fastest
▲ Vercel	🥇 Nitro	2.932s (-8.4% 🟢)	3.706s (-4.7%)	0.774s	9	1.00x
▲ Vercel	Next.js (Turbopack)	2.993s (-3.0%)	3.796s (-2.1%)	0.803s	9	1.02x
▲ Vercel	Express	3.069s (-4.7%)	3.698s (~)	0.629s	9	1.05x

🔍 Observability: Nitro | Next.js (Turbopack) | Express

Stream Benchmarks(includes TTFB metrics)

workflow with stream

💻 Local Development

World	Framework	Workflow Time	TTFB	Slurp	Wall Time	Overhead	Samples	vs Fastest
💻 Local	🥇 Next.js (Turbopack)	0.107s (-24.2% 🟢)	1.003s (~)	0.023s (+41.0% 🔺)	1.034s (+0.7%)	0.927s	10	1.00x
🌐 Starter	Next.js (Turbopack)	0.130s (+1.2%)	1.005s (~)	0.000s (~)	1.011s (~)	0.881s	10	1.21x
🌐 Redis	Next.js (Turbopack)	0.142s (-3.0%)	1.005s (~)	0.000s (+Infinity% 🔺)	1.014s (~)	0.871s	10	1.33x
💻 Local	Nitro	0.178s (+0.9%)	0.993s (~)	0.017s (+17.2% 🔺)	1.023s (~)	0.846s	10	1.66x
💻 Local	Express	0.184s (+3.7%)	0.992s (~)	0.016s (+5.2% 🔺)	1.024s (~)	0.839s	10	1.72x
🌐 Turso	Next.js (Turbopack)	0.464s (-9.5% 🟢)	0.978s (+4.7%)	0.000s (+Infinity% 🔺)	1.013s (~)	0.550s	10	4.33x
🌐 MongoDB	Next.js (Turbopack)	0.508s (-3.9%)	0.937s (+1.9%)	0.000s (~)	1.014s (~)	0.506s	10	4.75x
🐘 Postgres	Nitro	1.385s (-39.5% 🟢)	1.647s (-40.1% 🟢)	0.000s (-100.0% 🟢)	2.011s (-33.3% 🟢)	0.626s	10	12.95x
🐘 Postgres	Next.js (Turbopack)	1.397s (-4.1%)	1.700s (+2.2%)	0.000s (NaN%)	2.022s (~)	0.626s	10	13.05x
🐘 Postgres	Express	2.375s (+4.1%)	2.668s (-3.5%)	0.000s (+Infinity% 🔺)	3.014s (~)	0.639s	10	22.20x

▲ Production (Vercel)

World	Framework	Workflow Time	TTFB	Slurp	Wall Time	Overhead	Samples	vs Fastest
▲ Vercel	🥇 Express	2.751s (+8.0% 🔺)	3.198s (+4.1%)	0.481s (+4.3%)	4.126s (+4.5%)	1.375s	10	1.00x
▲ Vercel	Next.js (Turbopack)	2.795s (+7.8% 🔺)	3.217s (~)	0.535s (-60.0% 🟢)	4.183s (-16.4% 🟢)	1.389s	10	1.02x
▲ Vercel	Nitro	2.889s (+6.5% 🔺)	3.249s (+2.0%)	0.718s (+108.1% 🔺)	4.493s (+12.6% 🔺)	1.604s	10	1.05x

🔍 Observability: Express | Next.js (Turbopack) | Nitro

Summary

Fastest Framework by World

Winner determined by most benchmark wins

World	🥇 Fastest Framework	Wins
💻 Local	Next.js (Turbopack)	8/8
🐘 Postgres	Nitro	6/8
▲ Vercel	Nitro	5/8

Fastest World by Framework

Winner determined by most benchmark wins

Framework	🥇 Fastest World	Wins
Express	💻 Local	8/8
Next.js (Turbopack)	💻 Local	8/8
Nitro	💻 Local	8/8

Column Definitions

• Workflow Time: Runtime reported by workflow (completedAt - createdAt) - primary metric
• TTFB: Time to First Byte - time from workflow start until first stream byte received (stream benchmarks only)
• Slurp: Time from first byte to complete stream consumption (stream benchmarks only)
• Wall Time: Total testbench time (trigger workflow + poll for result)
• Overhead: Testbench overhead (Wall Time - Workflow Time)
• Samples: Number of benchmark iterations run
• vs Fastest: How much slower compared to the fastest configuration for this benchmark

Worlds:

• 💻 Local: In-memory filesystem world (local development)
• 🐘 Postgres: PostgreSQL database world (local development)
• ▲ Vercel: Vercel production/preview deployment
• 🌐 Starter: Community world (local development)
• 🌐 Turso: Community world (local development)
• 🌐 MongoDB: Community world (local development)
• 🌐 Redis: Community world (local development)
• 🌐 Jazz: Community world (local development)

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