[ai] Add collectUIMessages option to accumulate and return UIMessage[] from agent.stream - #768

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Jan 14, 2026
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[ai] Add collectUIMessages option to accumulate and return UIMessage[] from agent.stream#768
VaguelySerious merged 4 commits into
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peter/ui-message-return-v2

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@VaguelySeriousVaguelySerious commented Jan 12, 2026•
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Related to #688 and #739

This adds a new option collectUIMessages to agent.stream, which, if passed, adds a stream transformation for accumulating stream chunks in durable state, and will return uiMessages: UIMessage[] from the agent.stream call.

Screenshot 2026-01-12 at 4 41 13 PM

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Accumulate
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Signed-off-by: Peter Wielander <mittgfu@gmail.com>
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[ai] Add collectUIMessages option to accumulate and return UIMessag…
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…e[] from agent.stream
Signed-off-by: Peter Wielander <mittgfu@gmail.com>
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Signed-off-by: Peter Wielander <mittgfu@gmail.com>
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🦋 Changeset detected

Latest commit: 564c895

The changes in this PR will be included in the next version bump.

This PR includes changesets to release 2 packages
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🧪 E2E Test Results

❌ Some tests failed

Summary

PassedFailedSkippedTotal
✅ ▲ Vercel Production363011374
✅ 💻 Local Development33208340
✅ 📦 Local Production33208340
✅ 🐘 Local Postgres33208340
✅ 🪟 Windows340034
❌ 🌍 Community Worlds131170148
Total152417351576

❌ Failed Tests

🌍 Community Worlds (17 failed)

mongodb (1 failed):

  • webhookWorkflow

redis (1 failed):

  • webhookWorkflow

starter (14 failed):

  • addTenWorkflow
  • addTenWorkflow
  • error handling error propagation workflow errors nested function calls preserve message and stack trace
  • error handling error propagation workflow errors cross-file imports preserve message and stack trace
  • error handling error propagation step errors basic step error preserves message and stack trace
  • error handling error propagation step errors cross-file step error preserves message and function names in stack
  • error handling retry behavior regular Error retries until success
  • error handling retry behavior FatalError fails immediately without retries
  • error handling catchability FatalError can be caught and detected with FatalError.is()
  • 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
  • pathsAliasWorkflow - TypeScript path aliases resolve correctly

turso (1 failed):

  • webhookWorkflow

Details by Category

✅ ▲ Vercel Production
AppPassedFailedSkipped
✅ astro3301
✅ example3301
✅ express3301
✅ fastify3301
✅ hono3301
✅ nextjs-turbopack3301
✅ nextjs-webpack3301
✅ nitro3301
✅ nuxt3301
✅ sveltekit3301
✅ vite3301
✅ 💻 Local Development
AppPassedFailedSkipped
✅ astro-stable3301
✅ express-stable3301
✅ fastify-stable3301
✅ hono-stable3301
✅ nextjs-turbopack-stable3400
✅ nextjs-webpack-stable3400
✅ nitro-stable3301
✅ nuxt-stable3301
✅ sveltekit-stable3301
✅ vite-stable3301
✅ 📦 Local Production
AppPassedFailedSkipped
✅ astro-stable3301
✅ express-stable3301
✅ fastify-stable3301
✅ hono-stable3301
✅ nextjs-turbopack-stable3400
✅ nextjs-webpack-stable3400
✅ nitro-stable3301
✅ nuxt-stable3301
✅ sveltekit-stable3301
✅ vite-stable3301
✅ 🐘 Local Postgres
AppPassedFailedSkipped
✅ astro-stable3301
✅ express-stable3301
✅ fastify-stable3301
✅ hono-stable3301
✅ nextjs-turbopack-stable3400
✅ nextjs-webpack-stable3400
✅ nitro-stable3301
✅ nuxt-stable3301
✅ sveltekit-stable3301
✅ vite-stable3301
✅ 🪟 Windows
AppPassedFailedSkipped
✅ nextjs-turbopack3400
❌ 🌍 Community Worlds
AppPassedFailedSkipped
✅ mongodb-dev300
❌ mongodb3310
✅ redis-dev300
❌ redis3310
✅ starter-dev300
❌ starter20140
✅ turso-dev300
❌ turso3310

📋 View full workflow run

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📊 Benchmark Results

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

workflow with no steps

💻 Local Development

WorldFrameworkWorkflow TimeWall TimeOverheadSamplesvs Fastest
🌐 Starter🥇 Next.js (Turbopack)0.038s (+18.1% 🔺)1.014s (~)0.976s101.00x
🌐 RedisNext.js (Turbopack)0.040s (+13.1% 🔺)1.017s (~)0.977s101.05x
💻 LocalNext.js (Turbopack)0.044s (+10.3% 🔺)1.020s (~)0.976s101.16x
💻 LocalExpress0.045s (-6.5% 🟢)1.008s (~)0.963s101.18x
💻 LocalNitro0.046s (+10.5% 🔺)1.006s (~)0.960s101.22x
🌐 MongoDBNext.js (Turbopack)0.094s (-27.0% 🟢)1.018s (~)0.925s102.47x
🌐 TursoNext.js (Turbopack)0.105s (-2.2%)1.014s (~)0.910s102.76x
🐘 PostgresNext.js (Turbopack)0.118s (-2.7%)1.021s (~)0.902s103.13x
🐘 PostgresExpress0.263s (-29.3% 🟢)1.015s (~)0.751s106.95x
🐘 PostgresNitro0.288s (+12.0% 🔺)1.012s (-0.7%)0.724s107.60x

▲ Production (Vercel)

WorldFrameworkWorkflow TimeWall TimeOverheadSamplesvs Fastest
▲ Vercel🥇 Nitro0.558s (-27.3% 🟢)1.649s (-4.3%)1.090s101.00x
▲ VercelNext.js (Turbopack)0.576s (-24.9% 🟢)1.608s (-9.1% 🟢)1.032s101.03x
▲ VercelExpress0.613s (-20.9% 🟢)1.488s (-7.2% 🟢)0.875s101.10x

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

workflow with 1 step

💻 Local Development

WorldFrameworkWorkflow TimeWall TimeOverheadSamplesvs Fastest
🌐 Starter🥇 Next.js (Turbopack)1.095s (+2.2%)2.010s (~)0.915s101.00x
💻 LocalNext.js (Turbopack)1.099s (~)2.015s (~)0.916s101.00x
🌐 RedisNext.js (Turbopack)1.099s (+1.3%)2.013s (~)0.914s101.00x
💻 LocalNitro1.111s (~)2.005s (~)0.894s101.01x
💻 LocalExpress1.121s (+0.7%)2.007s (~)0.886s101.02x
🌐 TursoNext.js (Turbopack)1.301s (-0.8%)2.012s (~)0.712s101.19x
🌐 MongoDBNext.js (Turbopack)1.302s (+0.7%)2.014s (~)0.712s101.19x
🐘 PostgresNext.js (Turbopack)1.913s (~)2.018s (~)0.106s101.75x
🐘 PostgresNitro2.150s (-2.7%)3.014s (~)0.864s101.96x
🐘 PostgresExpress2.404s (+9.0% 🔺)3.015s (~)0.611s102.20x

▲ Production (Vercel)

WorldFrameworkWorkflow TimeWall TimeOverheadSamplesvs Fastest
▲ Vercel🥇 Nitro2.756s (-0.7%)3.785s (+3.4%)1.029s101.00x
▲ VercelNext.js (Turbopack)2.863s (+4.1%)3.705s (-2.6%)0.842s101.04x
▲ VercelExpress3.029s (+11.7% 🔺)3.765s (+4.1%)0.737s101.10x

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

workflow with 10 sequential steps

💻 Local Development

WorldFrameworkWorkflow TimeWall TimeOverheadSamplesvs Fastest
🌐 Starter🥇 Next.js (Turbopack)10.597s (+1.2%)11.011s (~)0.414s51.00x
🌐 RedisNext.js (Turbopack)10.650s (+0.9%)11.015s (~)0.365s51.01x
💻 LocalNext.js (Turbopack)10.707s (+0.7%)11.018s (~)0.312s51.01x
💻 LocalNitro10.767s (~)11.013s (~)0.245s51.02x
💻 LocalExpress10.823s (~)11.016s (~)0.193s51.02x
🌐 TursoNext.js (Turbopack)12.196s (~)13.027s (~)0.830s51.15x
🌐 MongoDBNext.js (Turbopack)12.230s (~)13.024s (~)0.794s51.15x
🐘 PostgresNext.js (Turbopack)15.435s (+4.5%)16.238s (+3.8%)0.803s51.46x
🐘 PostgresExpress20.229s (-0.6%)21.046s (~)0.817s51.91x
🐘 PostgresNitro20.375s (~)20.841s (-0.9%)0.466s51.92x

▲ Production (Vercel)

WorldFrameworkWorkflow TimeWall TimeOverheadSamplesvs Fastest
▲ Vercel🥇 Next.js (Turbopack)24.300s (+8.1% 🔺)25.264s (+9.1% 🔺)0.964s51.00x
▲ VercelExpress24.381s (+6.0% 🔺)25.047s (+6.0% 🔺)0.665s51.00x
▲ VercelNitro25.309s (+15.5% 🔺)26.132s (+14.2% 🔺)0.822s51.04x

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

Promise.all with 10 concurrent steps

💻 Local Development

WorldFrameworkWorkflow TimeWall TimeOverheadSamplesvs Fastest
🌐 Starter🥇 Next.js (Turbopack)1.352s (+3.6%)2.008s (~)0.656s151.00x
🌐 RedisNext.js (Turbopack)1.352s (+2.4%)2.010s (~)0.657s151.00x
💻 LocalNitro1.397s (-0.8%)2.004s (~)0.607s151.03x
💻 LocalNext.js (Turbopack)1.417s (+2.9%)2.012s (~)0.595s151.05x
💻 LocalExpress1.432s (+2.1%)2.007s (~)0.575s151.06x
🐘 PostgresNext.js (Turbopack)1.896s (+13.2% 🔺)2.039s (+1.3%)0.143s151.40x
🌐 MongoDBNext.js (Turbopack)2.134s (~)3.013s (~)0.879s101.58x
🌐 TursoNext.js (Turbopack)2.217s (~)3.013s (~)0.796s101.64x
🐘 PostgresNitro2.376s (-2.3%)3.011s (~)0.635s101.76x
🐘 PostgresExpress2.571s (+5.6% 🔺)3.013s (~)0.442s101.90x

▲ Production (Vercel)

WorldFrameworkWorkflow TimeWall TimeOverheadSamplesvs Fastest
▲ Vercel🥇 Next.js (Turbopack)2.948s (-2.0%)3.782s (-2.4%)0.834s81.00x
▲ VercelExpress3.023s (+4.1%)3.784s (+2.6%)0.761s91.03x
▲ VercelNitro3.190s (+6.6% 🔺)4.888s (+29.2% 🔺)1.698s71.08x

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

Promise.all with 25 concurrent steps

💻 Local Development

WorldFrameworkWorkflow TimeWall TimeOverheadSamplesvs Fastest
💻 Local🥇 Next.js (Turbopack)2.087s (-1.7%)2.924s (-1.3%)0.838s111.00x
💻 LocalNitro2.183s (-1.9%)3.148s (-0.7%)0.965s101.05x
💻 LocalExpress2.305s (+3.8%)3.258s (+3.1%)0.953s101.10x
🌐 RedisNext.js (Turbopack)2.481s (+6.0% 🔺)3.013s (~)0.532s101.19x
🌐 StarterNext.js (Turbopack)2.495s (+5.0% 🔺)3.010s (~)0.515s101.20x
🐘 PostgresNext.js (Turbopack)2.729s (+6.3% 🔺)3.017s (~)0.288s101.31x
🐘 PostgresNitro2.782s (-8.7% 🟢)3.021s (-20.1% 🟢)0.239s101.33x
🐘 PostgresExpress2.930s (+3.8%)3.015s (~)0.085s101.40x
🌐 TursoNext.js (Turbopack)4.654s (-0.8%)5.179s (~)0.524s62.23x
🌐 MongoDBNext.js (Turbopack)4.659s (+1.0%)5.187s (~)0.528s62.23x

▲ Production (Vercel)

WorldFrameworkWorkflow TimeWall TimeOverheadSamplesvs Fastest
▲ Vercel🥇 Next.js (Turbopack)4.054s (+19.6% 🔺)4.907s (+22.2% 🔺)0.853s71.00x
▲ VercelNitro4.142s (+11.8% 🔺)5.039s (+16.1% 🔺)0.898s61.02x
▲ VercelExpress4.578s (+43.4% 🔺)5.341s (+48.4% 🔺)0.763s61.13x

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

Promise.race with 10 concurrent steps

💻 Local Development

WorldFrameworkWorkflow TimeWall TimeOverheadSamplesvs Fastest
🌐 Redis🥇 Next.js (Turbopack)1.357s (+2.9%)2.010s (~)0.653s151.00x
🌐 StarterNext.js (Turbopack)1.364s (+3.7%)2.007s (~)0.643s151.01x
💻 LocalNext.js (Turbopack)1.413s (~)2.014s (~)0.601s151.04x
💻 LocalNitro1.418s (~)2.005s (~)0.586s151.05x
💻 LocalExpress1.449s (+1.9%)2.006s (~)0.558s151.07x
🐘 PostgresNext.js (Turbopack)1.511s (-13.9% 🟢)2.012s (~)0.501s151.11x
🐘 PostgresExpress1.656s (-15.6% 🟢)2.080s (-6.8% 🟢)0.424s151.22x
🐘 PostgresNitro1.901s (+7.3% 🔺)2.157s (+7.3% 🔺)0.257s141.40x
🌐 MongoDBNext.js (Turbopack)2.158s (~)3.014s (~)0.856s101.59x
🌐 TursoNext.js (Turbopack)2.208s (-0.5%)3.010s (~)0.802s101.63x

▲ Production (Vercel)

WorldFrameworkWorkflow TimeWall TimeOverheadSamplesvs Fastest
▲ Vercel🥇 Nitro2.813s (+0.9%)3.835s (+2.9%)1.022s81.00x
▲ VercelExpress2.979s (-5.2% 🟢)3.725s (-4.1%)0.746s91.06x
▲ VercelNext.js (Turbopack)2.987s (+6.2% 🔺)3.907s (+2.1%)0.920s81.06x

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

Promise.race with 25 concurrent steps

💻 Local Development

WorldFrameworkWorkflow TimeWall TimeOverheadSamplesvs Fastest
💻 Local🥇 Next.js (Turbopack)2.305s (+7.1% 🔺)3.261s (+7.0% 🔺)0.956s101.00x
💻 LocalNitro2.311s (+4.8%)3.219s (+1.9%)0.909s101.00x
💻 LocalExpress2.478s (+9.6% 🔺)3.304s (+2.4%)0.827s101.07x
🌐 StarterNext.js (Turbopack)2.484s (+4.7%)3.009s (~)0.525s101.08x
🌐 RedisNext.js (Turbopack)2.489s (+5.4% 🔺)3.044s (+1.1%)0.555s101.08x
🐘 PostgresNext.js (Turbopack)2.578s (~)3.027s (~)0.449s101.12x
🐘 PostgresNitro2.638s (-7.6% 🟢)3.011s (-3.7%)0.373s101.14x
🐘 PostgresExpress2.871s (+5.1% 🔺)3.123s (+3.5%)0.252s101.25x
🌐 MongoDBNext.js (Turbopack)4.674s (+0.7%)5.180s (~)0.506s62.03x
🌐 TursoNext.js (Turbopack)4.716s (+2.0%)5.181s (~)0.465s62.05x

▲ Production (Vercel)

WorldFrameworkWorkflow TimeWall TimeOverheadSamplesvs Fastest
▲ Vercel🥇 Express4.479s (+32.0% 🔺)4.954s (+20.1% 🔺)0.475s71.00x
▲ VercelNext.js (Turbopack)4.515s (+43.2% 🔺)5.114s (+30.5% 🔺)0.599s61.01x
▲ VercelNitro4.876s (+53.7% 🔺)5.665s (+47.8% 🔺)0.789s61.09x

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

Stream Benchmarks(includes TTFB metrics)
workflow with stream

💻 Local Development

WorldFrameworkWorkflow TimeTTFBSlurpWall TimeOverheadSamplesvs Fastest
🌐 Starter🥇 Next.js (Turbopack)0.133s (+42.0% 🔺)1.006s (~)0.000s (+100.0% 🔺)1.013s (~)0.881s101.00x
🌐 RedisNext.js (Turbopack)0.139s (+19.9% 🔺)1.004s (~)0.000s (+Infinity% 🔺)1.013s (~)0.874s101.05x
💻 LocalNext.js (Turbopack)0.146s (+5.5% 🔺)1.003s (~)0.020s (+22.4% 🔺)1.031s (~)0.885s101.10x
💻 LocalNitro0.170s (-4.0%)0.992s (~)0.016s (+5.4% 🔺)1.021s (~)0.851s101.28x
💻 LocalExpress0.185s (+6.6% 🔺)0.992s (~)0.018s (+12.0% 🔺)1.026s (~)0.840s101.40x
🌐 TursoNext.js (Turbopack)0.456s (-8.1% 🟢)0.997s (+4.9%)0.000s (+Infinity% 🔺)1.014s (~)0.558s103.44x
🌐 MongoDBNext.js (Turbopack)0.508s (-2.4%)0.941s (+1.7%)0.000s (NaN%)1.013s (~)0.505s103.83x
🐘 PostgresNext.js (Turbopack)1.273s (+46.9% 🔺)1.904s (+69.0% 🔺)0.000s (~)2.019s (+52.9% 🔺)0.746s109.60x
🐘 PostgresNitro2.280s (+3.7%)2.756s (-3.1%)0.000s (-100.0% 🟢)3.014s (~)0.734s1017.20x
🐘 PostgresExpress2.436s (+3.0%)2.610s (-2.6%)0.000s (+Infinity% 🔺)3.017s (~)0.581s1018.37x

▲ Production (Vercel)

WorldFrameworkWorkflow TimeTTFBSlurpWall TimeOverheadSamplesvs Fastest
▲ Vercel🥇 Next.js (Turbopack)2.857s (-5.4% 🟢)3.269s (-3.8%)0.961s (+58.8% 🔺)4.710s (+4.4%)1.853s101.00x
▲ VercelNitro2.863s (-4.9%)3.263s (-2.6%)0.418s (-12.0% 🟢)4.190s (-2.4%)1.327s101.00x
▲ VercelExpress2.893s (-7.1% 🟢)3.270s (-3.7%)0.425s (-15.1% 🟢)4.164s (-7.2% 🟢)1.271s101.01x

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

Summary

Fastest Framework by World

Winner determined by most benchmark wins

World🥇 Fastest FrameworkWins
💻 LocalNext.js (Turbopack)7/8
🐘 PostgresNext.js (Turbopack)8/8
▲ VercelNext.js (Turbopack)4/8
Fastest World by Framework

Winner determined by most benchmark wins

Framework🥇 Fastest WorldWins
Express💻 Local8/8
Next.js (Turbopack)🌐 Starter5/8
Nitro💻 Local8/8
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

@VaguelySerious
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Signed-off-by: Peter Wielander <mittgfu@gmail.com>
@VaguelySeriousVaguelySerious mentioned this pull request Jan 12, 2026
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@pranaygp

pranaygp commented Jan 12, 2026

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should this use the experimental_ convention from AI sdk? I'm just worried about the API diverge between us and AI sdk but maybe I shouldn't be?

@VaguelySerious

VaguelySerious commented Jan 13, 2026

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I'm just worried about the API diverge between us and AI sdk but maybe I shouldn't be?

@pranaygp Since we're only adding optional properties to existing interfaces, I'm less worried, since the property simply doesn't exist in AI SDK, and this is specifically only relevant for DurableAgent (since AI SDK has .toUIMessageStream({onFinish: (messages) => >...}) which DurableAgent hides

@VaguelySerious

VaguelySerious commented Jan 14, 2026

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Merging since it was in review for two days

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VaguelySerious merged commit 49bb48a into mainJan 14, 2026
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VaguelySerious deleted the peter/ui-message-return-v2 branch January 14, 2026 12:17
@vercel-release-botvercel-release-bot mentioned this pull request Jan 14, 2026
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@VaguelySeriousVaguelySerious mentioned this pull request Jan 15, 2026
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VaguelySerious added a commit that referenced this pull request Jan 16, 2026
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[ai] Add collectUIMessages option to accumulate and return UIMessage[…
e336fc4
…] from agent.stream (#768)
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, 'i'); if (__m === '*' || __re.test(location.href)) { injectUserscript("// Add copy buttons to all 
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[ai] Add collectUIMessages option to accumulate and return UIMessage[] from agent.stream - #768
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peter/ui-message-return-v2
Jan 14, 2026
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[ai] Add collectUIMessages option to accumulate and return UIMessage[] from agent.stream#768
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peter/ui-message-return-v2
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Related to #688 and #739
This adds a new option collectUIMessages to agent.stream, which, if passed, adds a stream transformation for accumulating stream chunks in durable state, and will return uiMessages: UIMessage[] from the agent.stream call.
Screenshot 2026-01-12 at 4 41 13 PM
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Accumulate
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Signed-off-by: Peter Wielander <mittgfu@gmail.com>
@VaguelySerious
[ai] Add collectUIMessages option to accumulate and return UIMessag…
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…e[] from agent.stream
Signed-off-by: Peter Wielander <mittgfu@gmail.com>
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Signed-off-by: Peter Wielander <mittgfu@gmail.com>
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🦋 Changeset detected
Latest commit: 564c895
The changes in this PR will be included in the next version bump.
This PR includes changesets to release 2 packages
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🧪 E2E Test Results
❌ Some tests failed
Summary
PassedFailedSkippedTotal
✅ ▲ Vercel Production363011374
✅ 💻 Local Development33208340
✅ 📦 Local Production33208340
✅ 🐘 Local Postgres33208340
✅ 🪟 Windows340034
❌ 🌍 Community Worlds131170148
Total152417351576
❌ Failed Tests
🌍 Community Worlds (17 failed)
mongodb (1 failed):
  • webhookWorkflow
redis (1 failed):
  • webhookWorkflow
starter (14 failed):
  • addTenWorkflow
  • addTenWorkflow
  • error handling error propagation workflow errors nested function calls preserve message and stack trace
  • error handling error propagation workflow errors cross-file imports preserve message and stack trace
  • error handling error propagation step errors basic step error preserves message and stack trace
  • error handling error propagation step errors cross-file step error preserves message and function names in stack
  • error handling retry behavior regular Error retries until success
  • error handling retry behavior FatalError fails immediately without retries
  • error handling catchability FatalError can be caught and detected with FatalError.is()
  • 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
  • pathsAliasWorkflow - TypeScript path aliases resolve correctly
turso (1 failed):
  • webhookWorkflow
Details by Category
✅ ▲ Vercel Production
AppPassedFailedSkipped
✅ astro3301
✅ example3301
✅ express3301
✅ fastify3301
✅ hono3301
✅ nextjs-turbopack3301
✅ nextjs-webpack3301
✅ nitro3301
✅ nuxt3301
✅ sveltekit3301
✅ vite3301
✅ 💻 Local Development
AppPassedFailedSkipped
✅ astro-stable3301
✅ express-stable3301
✅ fastify-stable3301
✅ hono-stable3301
✅ nextjs-turbopack-stable3400
✅ nextjs-webpack-stable3400
✅ nitro-stable3301
✅ nuxt-stable3301
✅ sveltekit-stable3301
✅ vite-stable3301
✅ 📦 Local Production
AppPassedFailedSkipped
✅ astro-stable3301
✅ express-stable3301
✅ fastify-stable3301
✅ hono-stable3301
✅ nextjs-turbopack-stable3400
✅ nextjs-webpack-stable3400
✅ nitro-stable3301
✅ nuxt-stable3301
✅ sveltekit-stable3301
✅ vite-stable3301
✅ 🐘 Local Postgres
AppPassedFailedSkipped
✅ astro-stable3301
✅ express-stable3301
✅ fastify-stable3301
✅ hono-stable3301
✅ nextjs-turbopack-stable3400
✅ nextjs-webpack-stable3400
✅ nitro-stable3301
✅ nuxt-stable3301
✅ sveltekit-stable3301
✅ vite-stable3301
✅ 🪟 Windows
AppPassedFailedSkipped
✅ nextjs-turbopack3400
❌ 🌍 Community Worlds
AppPassedFailedSkipped
✅ mongodb-dev300
❌ mongodb3310
✅ redis-dev300
❌ redis3310
✅ starter-dev300
❌ starter20140
✅ turso-dev300
❌ turso3310
📋 View full workflow run
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📊 Benchmark Results
📈 Comparing against baseline from main branch. Green 🟢 = faster, Red 🔺 = slower.
workflow with no steps
💻 Local Development
WorldFrameworkWorkflow TimeWall TimeOverheadSamplesvs Fastest
🌐 Starter🥇 Next.js (Turbopack)0.038s (+18.1% 🔺)1.014s (~)0.976s101.00x
🌐 RedisNext.js (Turbopack)0.040s (+13.1% 🔺)1.017s (~)0.977s101.05x
💻 LocalNext.js (Turbopack)0.044s (+10.3% 🔺)1.020s (~)0.976s101.16x
💻 LocalExpress0.045s (-6.5% 🟢)1.008s (~)0.963s101.18x
💻 LocalNitro0.046s (+10.5% 🔺)1.006s (~)0.960s101.22x
🌐 MongoDBNext.js (Turbopack)0.094s (-27.0% 🟢)1.018s (~)0.925s102.47x
🌐 TursoNext.js (Turbopack)0.105s (-2.2%)1.014s (~)0.910s102.76x
🐘 PostgresNext.js (Turbopack)0.118s (-2.7%)1.021s (~)0.902s103.13x
🐘 PostgresExpress0.263s (-29.3% 🟢)1.015s (~)0.751s106.95x
🐘 PostgresNitro0.288s (+12.0% 🔺)1.012s (-0.7%)0.724s107.60x
▲ Production (Vercel)
WorldFrameworkWorkflow TimeWall TimeOverheadSamplesvs Fastest
▲ Vercel🥇 Nitro0.558s (-27.3% 🟢)1.649s (-4.3%)1.090s101.00x
▲ VercelNext.js (Turbopack)0.576s (-24.9% 🟢)1.608s (-9.1% 🟢)1.032s101.03x
▲ VercelExpress0.613s (-20.9% 🟢)1.488s (-7.2% 🟢)0.875s101.10x
🔍 Observability: Nitro | Next.js (Turbopack) | Express
workflow with 1 step
💻 Local Development
WorldFrameworkWorkflow TimeWall TimeOverheadSamplesvs Fastest
🌐 Starter🥇 Next.js (Turbopack)1.095s (+2.2%)2.010s (~)0.915s101.00x
💻 LocalNext.js (Turbopack)1.099s (~)2.015s (~)0.916s101.00x
🌐 RedisNext.js (Turbopack)1.099s (+1.3%)2.013s (~)0.914s101.00x
💻 LocalNitro1.111s (~)2.005s (~)0.894s101.01x
💻 LocalExpress1.121s (+0.7%)2.007s (~)0.886s101.02x
🌐 TursoNext.js (Turbopack)1.301s (-0.8%)2.012s (~)0.712s101.19x
🌐 MongoDBNext.js (Turbopack)1.302s (+0.7%)2.014s (~)0.712s101.19x
🐘 PostgresNext.js (Turbopack)1.913s (~)2.018s (~)0.106s101.75x
🐘 PostgresNitro2.150s (-2.7%)3.014s (~)0.864s101.96x
🐘 PostgresExpress2.404s (+9.0% 🔺)3.015s (~)0.611s102.20x
▲ Production (Vercel)
WorldFrameworkWorkflow TimeWall TimeOverheadSamplesvs Fastest
▲ Vercel🥇 Nitro2.756s (-0.7%)3.785s (+3.4%)1.029s101.00x
▲ VercelNext.js (Turbopack)2.863s (+4.1%)3.705s (-2.6%)0.842s101.04x
▲ VercelExpress3.029s (+11.7% 🔺)3.765s (+4.1%)0.737s101.10x
🔍 Observability: Nitro | Next.js (Turbopack) | Express
workflow with 10 sequential steps
💻 Local Development
WorldFrameworkWorkflow TimeWall TimeOverheadSamplesvs Fastest
🌐 Starter🥇 Next.js (Turbopack)10.597s (+1.2%)11.011s (~)0.414s51.00x
🌐 RedisNext.js (Turbopack)10.650s (+0.9%)11.015s (~)0.365s51.01x
💻 LocalNext.js (Turbopack)10.707s (+0.7%)11.018s (~)0.312s51.01x
💻 LocalNitro10.767s (~)11.013s (~)0.245s51.02x
💻 LocalExpress10.823s (~)11.016s (~)0.193s51.02x
🌐 TursoNext.js (Turbopack)12.196s (~)13.027s (~)0.830s51.15x
🌐 MongoDBNext.js (Turbopack)12.230s (~)13.024s (~)0.794s51.15x
🐘 PostgresNext.js (Turbopack)15.435s (+4.5%)16.238s (+3.8%)0.803s51.46x
🐘 PostgresExpress20.229s (-0.6%)21.046s (~)0.817s51.91x
🐘 PostgresNitro20.375s (~)20.841s (-0.9%)0.466s51.92x
▲ Production (Vercel)
WorldFrameworkWorkflow TimeWall TimeOverheadSamplesvs Fastest
▲ Vercel🥇 Next.js (Turbopack)24.300s (+8.1% 🔺)25.264s (+9.1% 🔺)0.964s51.00x
▲ VercelExpress24.381s (+6.0% 🔺)25.047s (+6.0% 🔺)0.665s51.00x
▲ VercelNitro25.309s (+15.5% 🔺)26.132s (+14.2% 🔺)0.822s51.04x
🔍 Observability: Next.js (Turbopack) | Express | Nitro
Promise.all with 10 concurrent steps
💻 Local Development
WorldFrameworkWorkflow TimeWall TimeOverheadSamplesvs Fastest
🌐 Starter🥇 Next.js (Turbopack)1.352s (+3.6%)2.008s (~)0.656s151.00x
🌐 RedisNext.js (Turbopack)1.352s (+2.4%)2.010s (~)0.657s151.00x
💻 LocalNitro1.397s (-0.8%)2.004s (~)0.607s151.03x
💻 LocalNext.js (Turbopack)1.417s (+2.9%)2.012s (~)0.595s151.05x
💻 LocalExpress1.432s (+2.1%)2.007s (~)0.575s151.06x
🐘 PostgresNext.js (Turbopack)1.896s (+13.2% 🔺)2.039s (+1.3%)0.143s151.40x
🌐 MongoDBNext.js (Turbopack)2.134s (~)3.013s (~)0.879s101.58x
🌐 TursoNext.js (Turbopack)2.217s (~)3.013s (~)0.796s101.64x
🐘 PostgresNitro2.376s (-2.3%)3.011s (~)0.635s101.76x
🐘 PostgresExpress2.571s (+5.6% 🔺)3.013s (~)0.442s101.90x
▲ Production (Vercel)
WorldFrameworkWorkflow TimeWall TimeOverheadSamplesvs Fastest
▲ Vercel🥇 Next.js (Turbopack)2.948s (-2.0%)3.782s (-2.4%)0.834s81.00x
▲ VercelExpress3.023s (+4.1%)3.784s (+2.6%)0.761s91.03x
▲ VercelNitro3.190s (+6.6% 🔺)4.888s (+29.2% 🔺)1.698s71.08x
🔍 Observability: Next.js (Turbopack) | Express | Nitro
Promise.all with 25 concurrent steps
💻 Local Development
WorldFrameworkWorkflow TimeWall TimeOverheadSamplesvs Fastest
💻 Local🥇 Next.js (Turbopack)2.087s (-1.7%)2.924s (-1.3%)0.838s111.00x
💻 LocalNitro2.183s (-1.9%)3.148s (-0.7%)0.965s101.05x
💻 LocalExpress2.305s (+3.8%)3.258s (+3.1%)0.953s101.10x
🌐 RedisNext.js (Turbopack)2.481s (+6.0% 🔺)3.013s (~)0.532s101.19x
🌐 StarterNext.js (Turbopack)2.495s (+5.0% 🔺)3.010s (~)0.515s101.20x
🐘 PostgresNext.js (Turbopack)2.729s (+6.3% 🔺)3.017s (~)0.288s101.31x
🐘 PostgresNitro2.782s (-8.7% 🟢)3.021s (-20.1% 🟢)0.239s101.33x
🐘 PostgresExpress2.930s (+3.8%)3.015s (~)0.085s101.40x
🌐 TursoNext.js (Turbopack)4.654s (-0.8%)5.179s (~)0.524s62.23x
🌐 MongoDBNext.js (Turbopack)4.659s (+1.0%)5.187s (~)0.528s62.23x
▲ Production (Vercel)
WorldFrameworkWorkflow TimeWall TimeOverheadSamplesvs Fastest
▲ Vercel🥇 Next.js (Turbopack)4.054s (+19.6% 🔺)4.907s (+22.2% 🔺)0.853s71.00x
▲ VercelNitro4.142s (+11.8% 🔺)5.039s (+16.1% 🔺)0.898s61.02x
▲ VercelExpress4.578s (+43.4% 🔺)5.341s (+48.4% 🔺)0.763s61.13x
🔍 Observability: Next.js (Turbopack) | Nitro | Express
Promise.race with 10 concurrent steps
💻 Local Development
WorldFrameworkWorkflow TimeWall TimeOverheadSamplesvs Fastest
🌐 Redis🥇 Next.js (Turbopack)1.357s (+2.9%)2.010s (~)0.653s151.00x
🌐 StarterNext.js (Turbopack)1.364s (+3.7%)2.007s (~)0.643s151.01x
💻 LocalNext.js (Turbopack)1.413s (~)2.014s (~)0.601s151.04x
💻 LocalNitro1.418s (~)2.005s (~)0.586s151.05x
💻 LocalExpress1.449s (+1.9%)2.006s (~)0.558s151.07x
🐘 PostgresNext.js (Turbopack)1.511s (-13.9% 🟢)2.012s (~)0.501s151.11x
🐘 PostgresExpress1.656s (-15.6% 🟢)2.080s (-6.8% 🟢)0.424s151.22x
🐘 PostgresNitro1.901s (+7.3% 🔺)2.157s (+7.3% 🔺)0.257s141.40x
🌐 MongoDBNext.js (Turbopack)2.158s (~)3.014s (~)0.856s101.59x
🌐 TursoNext.js (Turbopack)2.208s (-0.5%)3.010s (~)0.802s101.63x
▲ Production (Vercel)
WorldFrameworkWorkflow TimeWall TimeOverheadSamplesvs Fastest
▲ Vercel🥇 Nitro2.813s (+0.9%)3.835s (+2.9%)1.022s81.00x
▲ VercelExpress2.979s (-5.2% 🟢)3.725s (-4.1%)0.746s91.06x
▲ VercelNext.js (Turbopack)2.987s (+6.2% 🔺)3.907s (+2.1%)0.920s81.06x
🔍 Observability: Nitro | Express | Next.js (Turbopack)
Promise.race with 25 concurrent steps
💻 Local Development
WorldFrameworkWorkflow TimeWall TimeOverheadSamplesvs Fastest
💻 Local🥇 Next.js (Turbopack)2.305s (+7.1% 🔺)3.261s (+7.0% 🔺)0.956s101.00x
💻 LocalNitro2.311s (+4.8%)3.219s (+1.9%)0.909s101.00x
💻 LocalExpress2.478s (+9.6% 🔺)3.304s (+2.4%)0.827s101.07x
🌐 StarterNext.js (Turbopack)2.484s (+4.7%)3.009s (~)0.525s101.08x
🌐 RedisNext.js (Turbopack)2.489s (+5.4% 🔺)3.044s (+1.1%)0.555s101.08x
🐘 PostgresNext.js (Turbopack)2.578s (~)3.027s (~)0.449s101.12x
🐘 PostgresNitro2.638s (-7.6% 🟢)3.011s (-3.7%)0.373s101.14x
🐘 PostgresExpress2.871s (+5.1% 🔺)3.123s (+3.5%)0.252s101.25x
🌐 MongoDBNext.js (Turbopack)4.674s (+0.7%)5.180s (~)0.506s62.03x
🌐 TursoNext.js (Turbopack)4.716s (+2.0%)5.181s (~)0.465s62.05x
▲ Production (Vercel)
WorldFrameworkWorkflow TimeWall TimeOverheadSamplesvs Fastest
▲ Vercel🥇 Express4.479s (+32.0% 🔺)4.954s (+20.1% 🔺)0.475s71.00x
▲ VercelNext.js (Turbopack)4.515s (+43.2% 🔺)5.114s (+30.5% 🔺)0.599s61.01x
▲ VercelNitro4.876s (+53.7% 🔺)5.665s (+47.8% 🔺)0.789s61.09x
🔍 Observability: Express | Next.js (Turbopack) | Nitro
Stream Benchmarks(includes TTFB metrics)
workflow with stream
💻 Local Development
WorldFrameworkWorkflow TimeTTFBSlurpWall TimeOverheadSamplesvs Fastest
🌐 Starter🥇 Next.js (Turbopack)0.133s (+42.0% 🔺)1.006s (~)0.000s (+100.0% 🔺)1.013s (~)0.881s101.00x
🌐 RedisNext.js (Turbopack)0.139s (+19.9% 🔺)1.004s (~)0.000s (+Infinity% 🔺)1.013s (~)0.874s101.05x
💻 LocalNext.js (Turbopack)0.146s (+5.5% 🔺)1.003s (~)0.020s (+22.4% 🔺)1.031s (~)0.885s101.10x
💻 LocalNitro0.170s (-4.0%)0.992s (~)0.016s (+5.4% 🔺)1.021s (~)0.851s101.28x
💻 LocalExpress0.185s (+6.6% 🔺)0.992s (~)0.018s (+12.0% 🔺)1.026s (~)0.840s101.40x
🌐 TursoNext.js (Turbopack)0.456s (-8.1% 🟢)0.997s (+4.9%)0.000s (+Infinity% 🔺)1.014s (~)0.558s103.44x
🌐 MongoDBNext.js (Turbopack)0.508s (-2.4%)0.941s (+1.7%)0.000s (NaN%)1.013s (~)0.505s103.83x
🐘 PostgresNext.js (Turbopack)1.273s (+46.9% 🔺)1.904s (+69.0% 🔺)0.000s (~)2.019s (+52.9% 🔺)0.746s109.60x
🐘 PostgresNitro2.280s (+3.7%)2.756s (-3.1%)0.000s (-100.0% 🟢)3.014s (~)0.734s1017.20x
🐘 PostgresExpress2.436s (+3.0%)2.610s (-2.6%)0.000s (+Infinity% 🔺)3.017s (~)0.581s1018.37x
▲ Production (Vercel)
WorldFrameworkWorkflow TimeTTFBSlurpWall TimeOverheadSamplesvs Fastest
▲ Vercel🥇 Next.js (Turbopack)2.857s (-5.4% 🟢)3.269s (-3.8%)0.961s (+58.8% 🔺)4.710s (+4.4%)1.853s101.00x
▲ VercelNitro2.863s (-4.9%)3.263s (-2.6%)0.418s (-12.0% 🟢)4.190s (-2.4%)1.327s101.00x
▲ VercelExpress2.893s (-7.1% 🟢)3.270s (-3.7%)0.425s (-15.1% 🟢)4.164s (-7.2% 🟢)1.271s101.01x
🔍 Observability: Next.js (Turbopack) | Nitro | Express
Summary
Fastest Framework by World
Winner determined by most benchmark wins
World🥇 Fastest FrameworkWins
💻 LocalNext.js (Turbopack)7/8
🐘 PostgresNext.js (Turbopack)8/8
▲ VercelNext.js (Turbopack)4/8
Fastest World by Framework
Winner determined by most benchmark wins
Framework🥇 Fastest WorldWins
Express💻 Local8/8
Next.js (Turbopack)🌐 Starter5/8
Nitro💻 Local8/8
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
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Signed-off-by: Peter Wielander <mittgfu@gmail.com>
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should this use the experimental_ convention from AI sdk? I'm just worried about the API diverge between us and AI sdk but maybe I shouldn't be?
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I'm just worried about the API diverge between us and AI sdk but maybe I shouldn't be?
@pranaygp Since we're only adding optional properties to existing interfaces, I'm less worried, since the property simply doesn't exist in AI SDK, and this is specifically only relevant for DurableAgent (since AI SDK has .toUIMessageStream({onFinish: (messages) => >...}) which DurableAgent hides
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Merging since it was in review for two days
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[ai] Add collectUIMessages option to accumulate and return UIMessage[…
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…] from agent.stream (#768)
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[ai] Add collectUIMessages option to accumulate and return UIMessage[] from agent.stream - #768
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[ai] Add collectUIMessages option to accumulate and return UIMessage[] from agent.stream#768
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Related to #688 and #739
This adds a new option collectUIMessages to agent.stream, which, if passed, adds a stream transformation for accumulating stream chunks in durable state, and will return uiMessages: UIMessage[] from the agent.stream call.
Screenshot 2026-01-12 at 4 41 13 PM
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Accumulate
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Signed-off-by: Peter Wielander <mittgfu@gmail.com>
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[ai] Add collectUIMessages option to accumulate and return UIMessag…
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…e[] from agent.stream
Signed-off-by: Peter Wielander <mittgfu@gmail.com>
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Signed-off-by: Peter Wielander <mittgfu@gmail.com>
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🦋 Changeset detected
Latest commit: 564c895
The changes in this PR will be included in the next version bump.
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🧪 E2E Test Results
❌ Some tests failed
Summary
PassedFailedSkippedTotal
✅ ▲ Vercel Production363011374
✅ 💻 Local Development33208340
✅ 📦 Local Production33208340
✅ 🐘 Local Postgres33208340
✅ 🪟 Windows340034
❌ 🌍 Community Worlds131170148
Total152417351576
❌ Failed Tests
🌍 Community Worlds (17 failed)
mongodb (1 failed):
  • webhookWorkflow
redis (1 failed):
  • webhookWorkflow
starter (14 failed):
  • addTenWorkflow
  • addTenWorkflow
  • error handling error propagation workflow errors nested function calls preserve message and stack trace
  • error handling error propagation workflow errors cross-file imports preserve message and stack trace
  • error handling error propagation step errors basic step error preserves message and stack trace
  • error handling error propagation step errors cross-file step error preserves message and function names in stack
  • error handling retry behavior regular Error retries until success
  • error handling retry behavior FatalError fails immediately without retries
  • error handling catchability FatalError can be caught and detected with FatalError.is()
  • 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
  • pathsAliasWorkflow - TypeScript path aliases resolve correctly
turso (1 failed):
  • webhookWorkflow
Details by Category
✅ ▲ Vercel Production
AppPassedFailedSkipped
✅ astro3301
✅ example3301
✅ express3301
✅ fastify3301
✅ hono3301
✅ nextjs-turbopack3301
✅ nextjs-webpack3301
✅ nitro3301
✅ nuxt3301
✅ sveltekit3301
✅ vite3301
✅ 💻 Local Development
AppPassedFailedSkipped
✅ astro-stable3301
✅ express-stable3301
✅ fastify-stable3301
✅ hono-stable3301
✅ nextjs-turbopack-stable3400
✅ nextjs-webpack-stable3400
✅ nitro-stable3301
✅ nuxt-stable3301
✅ sveltekit-stable3301
✅ vite-stable3301
✅ 📦 Local Production
AppPassedFailedSkipped
✅ astro-stable3301
✅ express-stable3301
✅ fastify-stable3301
✅ hono-stable3301
✅ nextjs-turbopack-stable3400
✅ nextjs-webpack-stable3400
✅ nitro-stable3301
✅ nuxt-stable3301
✅ sveltekit-stable3301
✅ vite-stable3301
✅ 🐘 Local Postgres
AppPassedFailedSkipped
✅ astro-stable3301
✅ express-stable3301
✅ fastify-stable3301
✅ hono-stable3301
✅ nextjs-turbopack-stable3400
✅ nextjs-webpack-stable3400
✅ nitro-stable3301
✅ nuxt-stable3301
✅ sveltekit-stable3301
✅ vite-stable3301
✅ 🪟 Windows
AppPassedFailedSkipped
✅ nextjs-turbopack3400
❌ 🌍 Community Worlds
AppPassedFailedSkipped
✅ mongodb-dev300
❌ mongodb3310
✅ redis-dev300
❌ redis3310
✅ starter-dev300
❌ starter20140
✅ turso-dev300
❌ turso3310
📋 View full workflow run
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📊 Benchmark Results
📈 Comparing against baseline from main branch. Green 🟢 = faster, Red 🔺 = slower.
workflow with no steps
💻 Local Development
WorldFrameworkWorkflow TimeWall TimeOverheadSamplesvs Fastest
🌐 Starter🥇 Next.js (Turbopack)0.038s (+18.1% 🔺)1.014s (~)0.976s101.00x
🌐 RedisNext.js (Turbopack)0.040s (+13.1% 🔺)1.017s (~)0.977s101.05x
💻 LocalNext.js (Turbopack)0.044s (+10.3% 🔺)1.020s (~)0.976s101.16x
💻 LocalExpress0.045s (-6.5% 🟢)1.008s (~)0.963s101.18x
💻 LocalNitro0.046s (+10.5% 🔺)1.006s (~)0.960s101.22x
🌐 MongoDBNext.js (Turbopack)0.094s (-27.0% 🟢)1.018s (~)0.925s102.47x
🌐 TursoNext.js (Turbopack)0.105s (-2.2%)1.014s (~)0.910s102.76x
🐘 PostgresNext.js (Turbopack)0.118s (-2.7%)1.021s (~)0.902s103.13x
🐘 PostgresExpress0.263s (-29.3% 🟢)1.015s (~)0.751s106.95x
🐘 PostgresNitro0.288s (+12.0% 🔺)1.012s (-0.7%)0.724s107.60x
▲ Production (Vercel)
WorldFrameworkWorkflow TimeWall TimeOverheadSamplesvs Fastest
▲ Vercel🥇 Nitro0.558s (-27.3% 🟢)1.649s (-4.3%)1.090s101.00x
▲ VercelNext.js (Turbopack)0.576s (-24.9% 🟢)1.608s (-9.1% 🟢)1.032s101.03x
▲ VercelExpress0.613s (-20.9% 🟢)1.488s (-7.2% 🟢)0.875s101.10x
🔍 Observability: Nitro | Next.js (Turbopack) | Express
workflow with 1 step
💻 Local Development
WorldFrameworkWorkflow TimeWall TimeOverheadSamplesvs Fastest
🌐 Starter🥇 Next.js (Turbopack)1.095s (+2.2%)2.010s (~)0.915s101.00x
💻 LocalNext.js (Turbopack)1.099s (~)2.015s (~)0.916s101.00x
🌐 RedisNext.js (Turbopack)1.099s (+1.3%)2.013s (~)0.914s101.00x
💻 LocalNitro1.111s (~)2.005s (~)0.894s101.01x
💻 LocalExpress1.121s (+0.7%)2.007s (~)0.886s101.02x
🌐 TursoNext.js (Turbopack)1.301s (-0.8%)2.012s (~)0.712s101.19x
🌐 MongoDBNext.js (Turbopack)1.302s (+0.7%)2.014s (~)0.712s101.19x
🐘 PostgresNext.js (Turbopack)1.913s (~)2.018s (~)0.106s101.75x
🐘 PostgresNitro2.150s (-2.7%)3.014s (~)0.864s101.96x
🐘 PostgresExpress2.404s (+9.0% 🔺)3.015s (~)0.611s102.20x
▲ Production (Vercel)
WorldFrameworkWorkflow TimeWall TimeOverheadSamplesvs Fastest
▲ Vercel🥇 Nitro2.756s (-0.7%)3.785s (+3.4%)1.029s101.00x
▲ VercelNext.js (Turbopack)2.863s (+4.1%)3.705s (-2.6%)0.842s101.04x
▲ VercelExpress3.029s (+11.7% 🔺)3.765s (+4.1%)0.737s101.10x
🔍 Observability: Nitro | Next.js (Turbopack) | Express
workflow with 10 sequential steps
💻 Local Development
WorldFrameworkWorkflow TimeWall TimeOverheadSamplesvs Fastest
🌐 Starter🥇 Next.js (Turbopack)10.597s (+1.2%)11.011s (~)0.414s51.00x
🌐 RedisNext.js (Turbopack)10.650s (+0.9%)11.015s (~)0.365s51.01x
💻 LocalNext.js (Turbopack)10.707s (+0.7%)11.018s (~)0.312s51.01x
💻 LocalNitro10.767s (~)11.013s (~)0.245s51.02x
💻 LocalExpress10.823s (~)11.016s (~)0.193s51.02x
🌐 TursoNext.js (Turbopack)12.196s (~)13.027s (~)0.830s51.15x
🌐 MongoDBNext.js (Turbopack)12.230s (~)13.024s (~)0.794s51.15x
🐘 PostgresNext.js (Turbopack)15.435s (+4.5%)16.238s (+3.8%)0.803s51.46x
🐘 PostgresExpress20.229s (-0.6%)21.046s (~)0.817s51.91x
🐘 PostgresNitro20.375s (~)20.841s (-0.9%)0.466s51.92x
▲ Production (Vercel)
WorldFrameworkWorkflow TimeWall TimeOverheadSamplesvs Fastest
▲ Vercel🥇 Next.js (Turbopack)24.300s (+8.1% 🔺)25.264s (+9.1% 🔺)0.964s51.00x
▲ VercelExpress24.381s (+6.0% 🔺)25.047s (+6.0% 🔺)0.665s51.00x
▲ VercelNitro25.309s (+15.5% 🔺)26.132s (+14.2% 🔺)0.822s51.04x
🔍 Observability: Next.js (Turbopack) | Express | Nitro
Promise.all with 10 concurrent steps
💻 Local Development
WorldFrameworkWorkflow TimeWall TimeOverheadSamplesvs Fastest
🌐 Starter🥇 Next.js (Turbopack)1.352s (+3.6%)2.008s (~)0.656s151.00x
🌐 RedisNext.js (Turbopack)1.352s (+2.4%)2.010s (~)0.657s151.00x
💻 LocalNitro1.397s (-0.8%)2.004s (~)0.607s151.03x
💻 LocalNext.js (Turbopack)1.417s (+2.9%)2.012s (~)0.595s151.05x
💻 LocalExpress1.432s (+2.1%)2.007s (~)0.575s151.06x
🐘 PostgresNext.js (Turbopack)1.896s (+13.2% 🔺)2.039s (+1.3%)0.143s151.40x
🌐 MongoDBNext.js (Turbopack)2.134s (~)3.013s (~)0.879s101.58x
🌐 TursoNext.js (Turbopack)2.217s (~)3.013s (~)0.796s101.64x
🐘 PostgresNitro2.376s (-2.3%)3.011s (~)0.635s101.76x
🐘 PostgresExpress2.571s (+5.6% 🔺)3.013s (~)0.442s101.90x
▲ Production (Vercel)
WorldFrameworkWorkflow TimeWall TimeOverheadSamplesvs Fastest
▲ Vercel🥇 Next.js (Turbopack)2.948s (-2.0%)3.782s (-2.4%)0.834s81.00x
▲ VercelExpress3.023s (+4.1%)3.784s (+2.6%)0.761s91.03x
▲ VercelNitro3.190s (+6.6% 🔺)4.888s (+29.2% 🔺)1.698s71.08x
🔍 Observability: Next.js (Turbopack) | Express | Nitro
Promise.all with 25 concurrent steps
💻 Local Development
WorldFrameworkWorkflow TimeWall TimeOverheadSamplesvs Fastest
💻 Local🥇 Next.js (Turbopack)2.087s (-1.7%)2.924s (-1.3%)0.838s111.00x
💻 LocalNitro2.183s (-1.9%)3.148s (-0.7%)0.965s101.05x
💻 LocalExpress2.305s (+3.8%)3.258s (+3.1%)0.953s101.10x
🌐 RedisNext.js (Turbopack)2.481s (+6.0% 🔺)3.013s (~)0.532s101.19x
🌐 StarterNext.js (Turbopack)2.495s (+5.0% 🔺)3.010s (~)0.515s101.20x
🐘 PostgresNext.js (Turbopack)2.729s (+6.3% 🔺)3.017s (~)0.288s101.31x
🐘 PostgresNitro2.782s (-8.7% 🟢)3.021s (-20.1% 🟢)0.239s101.33x
🐘 PostgresExpress2.930s (+3.8%)3.015s (~)0.085s101.40x
🌐 TursoNext.js (Turbopack)4.654s (-0.8%)5.179s (~)0.524s62.23x
🌐 MongoDBNext.js (Turbopack)4.659s (+1.0%)5.187s (~)0.528s62.23x
▲ Production (Vercel)
WorldFrameworkWorkflow TimeWall TimeOverheadSamplesvs Fastest
▲ Vercel🥇 Next.js (Turbopack)4.054s (+19.6% 🔺)4.907s (+22.2% 🔺)0.853s71.00x
▲ VercelNitro4.142s (+11.8% 🔺)5.039s (+16.1% 🔺)0.898s61.02x
▲ VercelExpress4.578s (+43.4% 🔺)5.341s (+48.4% 🔺)0.763s61.13x
🔍 Observability: Next.js (Turbopack) | Nitro | Express
Promise.race with 10 concurrent steps
💻 Local Development
WorldFrameworkWorkflow TimeWall TimeOverheadSamplesvs Fastest
🌐 Redis🥇 Next.js (Turbopack)1.357s (+2.9%)2.010s (~)0.653s151.00x
🌐 StarterNext.js (Turbopack)1.364s (+3.7%)2.007s (~)0.643s151.01x
💻 LocalNext.js (Turbopack)1.413s (~)2.014s (~)0.601s151.04x
💻 LocalNitro1.418s (~)2.005s (~)0.586s151.05x
💻 LocalExpress1.449s (+1.9%)2.006s (~)0.558s151.07x
🐘 PostgresNext.js (Turbopack)1.511s (-13.9% 🟢)2.012s (~)0.501s151.11x
🐘 PostgresExpress1.656s (-15.6% 🟢)2.080s (-6.8% 🟢)0.424s151.22x
🐘 PostgresNitro1.901s (+7.3% 🔺)2.157s (+7.3% 🔺)0.257s141.40x
🌐 MongoDBNext.js (Turbopack)2.158s (~)3.014s (~)0.856s101.59x
🌐 TursoNext.js (Turbopack)2.208s (-0.5%)3.010s (~)0.802s101.63x
▲ Production (Vercel)
WorldFrameworkWorkflow TimeWall TimeOverheadSamplesvs Fastest
▲ Vercel🥇 Nitro2.813s (+0.9%)3.835s (+2.9%)1.022s81.00x
▲ VercelExpress2.979s (-5.2% 🟢)3.725s (-4.1%)0.746s91.06x
▲ VercelNext.js (Turbopack)2.987s (+6.2% 🔺)3.907s (+2.1%)0.920s81.06x
🔍 Observability: Nitro | Express | Next.js (Turbopack)
Promise.race with 25 concurrent steps
💻 Local Development
WorldFrameworkWorkflow TimeWall TimeOverheadSamplesvs Fastest
💻 Local🥇 Next.js (Turbopack)2.305s (+7.1% 🔺)3.261s (+7.0% 🔺)0.956s101.00x
💻 LocalNitro2.311s (+4.8%)3.219s (+1.9%)0.909s101.00x
💻 LocalExpress2.478s (+9.6% 🔺)3.304s (+2.4%)0.827s101.07x
🌐 StarterNext.js (Turbopack)2.484s (+4.7%)3.009s (~)0.525s101.08x
🌐 RedisNext.js (Turbopack)2.489s (+5.4% 🔺)3.044s (+1.1%)0.555s101.08x
🐘 PostgresNext.js (Turbopack)2.578s (~)3.027s (~)0.449s101.12x
🐘 PostgresNitro2.638s (-7.6% 🟢)3.011s (-3.7%)0.373s101.14x
🐘 PostgresExpress2.871s (+5.1% 🔺)3.123s (+3.5%)0.252s101.25x
🌐 MongoDBNext.js (Turbopack)4.674s (+0.7%)5.180s (~)0.506s62.03x
🌐 TursoNext.js (Turbopack)4.716s (+2.0%)5.181s (~)0.465s62.05x
▲ Production (Vercel)
WorldFrameworkWorkflow TimeWall TimeOverheadSamplesvs Fastest
▲ Vercel🥇 Express4.479s (+32.0% 🔺)4.954s (+20.1% 🔺)0.475s71.00x
▲ VercelNext.js (Turbopack)4.515s (+43.2% 🔺)5.114s (+30.5% 🔺)0.599s61.01x
▲ VercelNitro4.876s (+53.7% 🔺)5.665s (+47.8% 🔺)0.789s61.09x
🔍 Observability: Express | Next.js (Turbopack) | Nitro
Stream Benchmarks(includes TTFB metrics)
workflow with stream
💻 Local Development
WorldFrameworkWorkflow TimeTTFBSlurpWall TimeOverheadSamplesvs Fastest
🌐 Starter🥇 Next.js (Turbopack)0.133s (+42.0% 🔺)1.006s (~)0.000s (+100.0% 🔺)1.013s (~)0.881s101.00x
🌐 RedisNext.js (Turbopack)0.139s (+19.9% 🔺)1.004s (~)0.000s (+Infinity% 🔺)1.013s (~)0.874s101.05x
💻 LocalNext.js (Turbopack)0.146s (+5.5% 🔺)1.003s (~)0.020s (+22.4% 🔺)1.031s (~)0.885s101.10x
💻 LocalNitro0.170s (-4.0%)0.992s (~)0.016s (+5.4% 🔺)1.021s (~)0.851s101.28x
💻 LocalExpress0.185s (+6.6% 🔺)0.992s (~)0.018s (+12.0% 🔺)1.026s (~)0.840s101.40x
🌐 TursoNext.js (Turbopack)0.456s (-8.1% 🟢)0.997s (+4.9%)0.000s (+Infinity% 🔺)1.014s (~)0.558s103.44x
🌐 MongoDBNext.js (Turbopack)0.508s (-2.4%)0.941s (+1.7%)0.000s (NaN%)1.013s (~)0.505s103.83x
🐘 PostgresNext.js (Turbopack)1.273s (+46.9% 🔺)1.904s (+69.0% 🔺)0.000s (~)2.019s (+52.9% 🔺)0.746s109.60x
🐘 PostgresNitro2.280s (+3.7%)2.756s (-3.1%)0.000s (-100.0% 🟢)3.014s (~)0.734s1017.20x
🐘 PostgresExpress2.436s (+3.0%)2.610s (-2.6%)0.000s (+Infinity% 🔺)3.017s (~)0.581s1018.37x
▲ Production (Vercel)
WorldFrameworkWorkflow TimeTTFBSlurpWall TimeOverheadSamplesvs Fastest
▲ Vercel🥇 Next.js (Turbopack)2.857s (-5.4% 🟢)3.269s (-3.8%)0.961s (+58.8% 🔺)4.710s (+4.4%)1.853s101.00x
▲ VercelNitro2.863s (-4.9%)3.263s (-2.6%)0.418s (-12.0% 🟢)4.190s (-2.4%)1.327s101.00x
▲ VercelExpress2.893s (-7.1% 🟢)3.270s (-3.7%)0.425s (-15.1% 🟢)4.164s (-7.2% 🟢)1.271s101.01x
🔍 Observability: Next.js (Turbopack) | Nitro | Express
Summary
Fastest Framework by World
Winner determined by most benchmark wins
World🥇 Fastest FrameworkWins
💻 LocalNext.js (Turbopack)7/8
🐘 PostgresNext.js (Turbopack)8/8
▲ VercelNext.js (Turbopack)4/8
Fastest World by Framework
Winner determined by most benchmark wins
Framework🥇 Fastest WorldWins
Express💻 Local8/8
Next.js (Turbopack)🌐 Starter5/8
Nitro💻 Local8/8
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
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Signed-off-by: Peter Wielander <mittgfu@gmail.com>
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should this use the experimental_ convention from AI sdk? I'm just worried about the API diverge between us and AI sdk but maybe I shouldn't be?
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I'm just worried about the API diverge between us and AI sdk but maybe I shouldn't be?
@pranaygp Since we're only adding optional properties to existing interfaces, I'm less worried, since the property simply doesn't exist in AI SDK, and this is specifically only relevant for DurableAgent (since AI SDK has .toUIMessageStream({onFinish: (messages) => >...}) which DurableAgent hides
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Merging since it was in review for two days
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[ai] Add collectUIMessages option to accumulate and return UIMessage[…
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…] from agent.stream (#768)
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[ai] Add collectUIMessages option to accumulate and return UIMessage[] from agent.stream - #768
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[ai] Add collectUIMessages option to accumulate and return UIMessage[] from agent.stream#768
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Related to #688 and #739
This adds a new option collectUIMessages to agent.stream, which, if passed, adds a stream transformation for accumulating stream chunks in durable state, and will return uiMessages: UIMessage[] from the agent.stream call.
Screenshot 2026-01-12 at 4 41 13 PM
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Signed-off-by: Peter Wielander <mittgfu@gmail.com>
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[ai] Add collectUIMessages option to accumulate and return UIMessag…
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…e[] from agent.stream
Signed-off-by: Peter Wielander <mittgfu@gmail.com>
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Signed-off-by: Peter Wielander <mittgfu@gmail.com>
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🦋 Changeset detected
Latest commit: 564c895
The changes in this PR will be included in the next version bump.
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The latest updates on your projects. Learn more about Vercel for GitHub.
ProjectDeploymentReviewUpdated (UTC)
example-nextjs-workflow-turbopackReadyReadyPreview, CommentJan 12, 2026 3:37pm
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🧪 E2E Test Results
❌ Some tests failed
Summary
PassedFailedSkippedTotal
✅ ▲ Vercel Production363011374
✅ 💻 Local Development33208340
✅ 📦 Local Production33208340
✅ 🐘 Local Postgres33208340
✅ 🪟 Windows340034
❌ 🌍 Community Worlds131170148
Total152417351576
❌ Failed Tests
🌍 Community Worlds (17 failed)
mongodb (1 failed):
  • webhookWorkflow
redis (1 failed):
  • webhookWorkflow
starter (14 failed):
  • addTenWorkflow
  • addTenWorkflow
  • error handling error propagation workflow errors nested function calls preserve message and stack trace
  • error handling error propagation workflow errors cross-file imports preserve message and stack trace
  • error handling error propagation step errors basic step error preserves message and stack trace
  • error handling error propagation step errors cross-file step error preserves message and function names in stack
  • error handling retry behavior regular Error retries until success
  • error handling retry behavior FatalError fails immediately without retries
  • error handling catchability FatalError can be caught and detected with FatalError.is()
  • 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
  • pathsAliasWorkflow - TypeScript path aliases resolve correctly
turso (1 failed):
  • webhookWorkflow
Details by Category
✅ ▲ Vercel Production
AppPassedFailedSkipped
✅ astro3301
✅ example3301
✅ express3301
✅ fastify3301
✅ hono3301
✅ nextjs-turbopack3301
✅ nextjs-webpack3301
✅ nitro3301
✅ nuxt3301
✅ sveltekit3301
✅ vite3301
✅ 💻 Local Development
AppPassedFailedSkipped
✅ astro-stable3301
✅ express-stable3301
✅ fastify-stable3301
✅ hono-stable3301
✅ nextjs-turbopack-stable3400
✅ nextjs-webpack-stable3400
✅ nitro-stable3301
✅ nuxt-stable3301
✅ sveltekit-stable3301
✅ vite-stable3301
✅ 📦 Local Production
AppPassedFailedSkipped
✅ astro-stable3301
✅ express-stable3301
✅ fastify-stable3301
✅ hono-stable3301
✅ nextjs-turbopack-stable3400
✅ nextjs-webpack-stable3400
✅ nitro-stable3301
✅ nuxt-stable3301
✅ sveltekit-stable3301
✅ vite-stable3301
✅ 🐘 Local Postgres
AppPassedFailedSkipped
✅ astro-stable3301
✅ express-stable3301
✅ fastify-stable3301
✅ hono-stable3301
✅ nextjs-turbopack-stable3400
✅ nextjs-webpack-stable3400
✅ nitro-stable3301
✅ nuxt-stable3301
✅ sveltekit-stable3301
✅ vite-stable3301
✅ 🪟 Windows
AppPassedFailedSkipped
✅ nextjs-turbopack3400
❌ 🌍 Community Worlds
AppPassedFailedSkipped
✅ mongodb-dev300
❌ mongodb3310
✅ redis-dev300
❌ redis3310
✅ starter-dev300
❌ starter20140
✅ turso-dev300
❌ turso3310
📋 View full workflow run
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📊 Benchmark Results
📈 Comparing against baseline from main branch. Green 🟢 = faster, Red 🔺 = slower.
workflow with no steps
💻 Local Development
WorldFrameworkWorkflow TimeWall TimeOverheadSamplesvs Fastest
🌐 Starter🥇 Next.js (Turbopack)0.038s (+18.1% 🔺)1.014s (~)0.976s101.00x
🌐 RedisNext.js (Turbopack)0.040s (+13.1% 🔺)1.017s (~)0.977s101.05x
💻 LocalNext.js (Turbopack)0.044s (+10.3% 🔺)1.020s (~)0.976s101.16x
💻 LocalExpress0.045s (-6.5% 🟢)1.008s (~)0.963s101.18x
💻 LocalNitro0.046s (+10.5% 🔺)1.006s (~)0.960s101.22x
🌐 MongoDBNext.js (Turbopack)0.094s (-27.0% 🟢)1.018s (~)0.925s102.47x
🌐 TursoNext.js (Turbopack)0.105s (-2.2%)1.014s (~)0.910s102.76x
🐘 PostgresNext.js (Turbopack)0.118s (-2.7%)1.021s (~)0.902s103.13x
🐘 PostgresExpress0.263s (-29.3% 🟢)1.015s (~)0.751s106.95x
🐘 PostgresNitro0.288s (+12.0% 🔺)1.012s (-0.7%)0.724s107.60x
▲ Production (Vercel)
WorldFrameworkWorkflow TimeWall TimeOverheadSamplesvs Fastest
▲ Vercel🥇 Nitro0.558s (-27.3% 🟢)1.649s (-4.3%)1.090s101.00x
▲ VercelNext.js (Turbopack)0.576s (-24.9% 🟢)1.608s (-9.1% 🟢)1.032s101.03x
▲ VercelExpress0.613s (-20.9% 🟢)1.488s (-7.2% 🟢)0.875s101.10x
🔍 Observability: Nitro | Next.js (Turbopack) | Express
workflow with 1 step
💻 Local Development
WorldFrameworkWorkflow TimeWall TimeOverheadSamplesvs Fastest
🌐 Starter🥇 Next.js (Turbopack)1.095s (+2.2%)2.010s (~)0.915s101.00x
💻 LocalNext.js (Turbopack)1.099s (~)2.015s (~)0.916s101.00x
🌐 RedisNext.js (Turbopack)1.099s (+1.3%)2.013s (~)0.914s101.00x
💻 LocalNitro1.111s (~)2.005s (~)0.894s101.01x
💻 LocalExpress1.121s (+0.7%)2.007s (~)0.886s101.02x
🌐 TursoNext.js (Turbopack)1.301s (-0.8%)2.012s (~)0.712s101.19x
🌐 MongoDBNext.js (Turbopack)1.302s (+0.7%)2.014s (~)0.712s101.19x
🐘 PostgresNext.js (Turbopack)1.913s (~)2.018s (~)0.106s101.75x
🐘 PostgresNitro2.150s (-2.7%)3.014s (~)0.864s101.96x
🐘 PostgresExpress2.404s (+9.0% 🔺)3.015s (~)0.611s102.20x
▲ Production (Vercel)
WorldFrameworkWorkflow TimeWall TimeOverheadSamplesvs Fastest
▲ Vercel🥇 Nitro2.756s (-0.7%)3.785s (+3.4%)1.029s101.00x
▲ VercelNext.js (Turbopack)2.863s (+4.1%)3.705s (-2.6%)0.842s101.04x
▲ VercelExpress3.029s (+11.7% 🔺)3.765s (+4.1%)0.737s101.10x
🔍 Observability: Nitro | Next.js (Turbopack) | Express
workflow with 10 sequential steps
💻 Local Development
WorldFrameworkWorkflow TimeWall TimeOverheadSamplesvs Fastest
🌐 Starter🥇 Next.js (Turbopack)10.597s (+1.2%)11.011s (~)0.414s51.00x
🌐 RedisNext.js (Turbopack)10.650s (+0.9%)11.015s (~)0.365s51.01x
💻 LocalNext.js (Turbopack)10.707s (+0.7%)11.018s (~)0.312s51.01x
💻 LocalNitro10.767s (~)11.013s (~)0.245s51.02x
💻 LocalExpress10.823s (~)11.016s (~)0.193s51.02x
🌐 TursoNext.js (Turbopack)12.196s (~)13.027s (~)0.830s51.15x
🌐 MongoDBNext.js (Turbopack)12.230s (~)13.024s (~)0.794s51.15x
🐘 PostgresNext.js (Turbopack)15.435s (+4.5%)16.238s (+3.8%)0.803s51.46x
🐘 PostgresExpress20.229s (-0.6%)21.046s (~)0.817s51.91x
🐘 PostgresNitro20.375s (~)20.841s (-0.9%)0.466s51.92x
▲ Production (Vercel)
WorldFrameworkWorkflow TimeWall TimeOverheadSamplesvs Fastest
▲ Vercel🥇 Next.js (Turbopack)24.300s (+8.1% 🔺)25.264s (+9.1% 🔺)0.964s51.00x
▲ VercelExpress24.381s (+6.0% 🔺)25.047s (+6.0% 🔺)0.665s51.00x
▲ VercelNitro25.309s (+15.5% 🔺)26.132s (+14.2% 🔺)0.822s51.04x
🔍 Observability: Next.js (Turbopack) | Express | Nitro
Promise.all with 10 concurrent steps
💻 Local Development
WorldFrameworkWorkflow TimeWall TimeOverheadSamplesvs Fastest
🌐 Starter🥇 Next.js (Turbopack)1.352s (+3.6%)2.008s (~)0.656s151.00x
🌐 RedisNext.js (Turbopack)1.352s (+2.4%)2.010s (~)0.657s151.00x
💻 LocalNitro1.397s (-0.8%)2.004s (~)0.607s151.03x
💻 LocalNext.js (Turbopack)1.417s (+2.9%)2.012s (~)0.595s151.05x
💻 LocalExpress1.432s (+2.1%)2.007s (~)0.575s151.06x
🐘 PostgresNext.js (Turbopack)1.896s (+13.2% 🔺)2.039s (+1.3%)0.143s151.40x
🌐 MongoDBNext.js (Turbopack)2.134s (~)3.013s (~)0.879s101.58x
🌐 TursoNext.js (Turbopack)2.217s (~)3.013s (~)0.796s101.64x
🐘 PostgresNitro2.376s (-2.3%)3.011s (~)0.635s101.76x
🐘 PostgresExpress2.571s (+5.6% 🔺)3.013s (~)0.442s101.90x
▲ Production (Vercel)
WorldFrameworkWorkflow TimeWall TimeOverheadSamplesvs Fastest
▲ Vercel🥇 Next.js (Turbopack)2.948s (-2.0%)3.782s (-2.4%)0.834s81.00x
▲ VercelExpress3.023s (+4.1%)3.784s (+2.6%)0.761s91.03x
▲ VercelNitro3.190s (+6.6% 🔺)4.888s (+29.2% 🔺)1.698s71.08x
🔍 Observability: Next.js (Turbopack) | Express | Nitro
Promise.all with 25 concurrent steps
💻 Local Development
WorldFrameworkWorkflow TimeWall TimeOverheadSamplesvs Fastest
💻 Local🥇 Next.js (Turbopack)2.087s (-1.7%)2.924s (-1.3%)0.838s111.00x
💻 LocalNitro2.183s (-1.9%)3.148s (-0.7%)0.965s101.05x
💻 LocalExpress2.305s (+3.8%)3.258s (+3.1%)0.953s101.10x
🌐 RedisNext.js (Turbopack)2.481s (+6.0% 🔺)3.013s (~)0.532s101.19x
🌐 StarterNext.js (Turbopack)2.495s (+5.0% 🔺)3.010s (~)0.515s101.20x
🐘 PostgresNext.js (Turbopack)2.729s (+6.3% 🔺)3.017s (~)0.288s101.31x
🐘 PostgresNitro2.782s (-8.7% 🟢)3.021s (-20.1% 🟢)0.239s101.33x
🐘 PostgresExpress2.930s (+3.8%)3.015s (~)0.085s101.40x
🌐 TursoNext.js (Turbopack)4.654s (-0.8%)5.179s (~)0.524s62.23x
🌐 MongoDBNext.js (Turbopack)4.659s (+1.0%)5.187s (~)0.528s62.23x
▲ Production (Vercel)
WorldFrameworkWorkflow TimeWall TimeOverheadSamplesvs Fastest
▲ Vercel🥇 Next.js (Turbopack)4.054s (+19.6% 🔺)4.907s (+22.2% 🔺)0.853s71.00x
▲ VercelNitro4.142s (+11.8% 🔺)5.039s (+16.1% 🔺)0.898s61.02x
▲ VercelExpress4.578s (+43.4% 🔺)5.341s (+48.4% 🔺)0.763s61.13x
🔍 Observability: Next.js (Turbopack) | Nitro | Express
Promise.race with 10 concurrent steps
💻 Local Development
WorldFrameworkWorkflow TimeWall TimeOverheadSamplesvs Fastest
🌐 Redis🥇 Next.js (Turbopack)1.357s (+2.9%)2.010s (~)0.653s151.00x
🌐 StarterNext.js (Turbopack)1.364s (+3.7%)2.007s (~)0.643s151.01x
💻 LocalNext.js (Turbopack)1.413s (~)2.014s (~)0.601s151.04x
💻 LocalNitro1.418s (~)2.005s (~)0.586s151.05x
💻 LocalExpress1.449s (+1.9%)2.006s (~)0.558s151.07x
🐘 PostgresNext.js (Turbopack)1.511s (-13.9% 🟢)2.012s (~)0.501s151.11x
🐘 PostgresExpress1.656s (-15.6% 🟢)2.080s (-6.8% 🟢)0.424s151.22x
🐘 PostgresNitro1.901s (+7.3% 🔺)2.157s (+7.3% 🔺)0.257s141.40x
🌐 MongoDBNext.js (Turbopack)2.158s (~)3.014s (~)0.856s101.59x
🌐 TursoNext.js (Turbopack)2.208s (-0.5%)3.010s (~)0.802s101.63x
▲ Production (Vercel)
WorldFrameworkWorkflow TimeWall TimeOverheadSamplesvs Fastest
▲ Vercel🥇 Nitro2.813s (+0.9%)3.835s (+2.9%)1.022s81.00x
▲ VercelExpress2.979s (-5.2% 🟢)3.725s (-4.1%)0.746s91.06x
▲ VercelNext.js (Turbopack)2.987s (+6.2% 🔺)3.907s (+2.1%)0.920s81.06x
🔍 Observability: Nitro | Express | Next.js (Turbopack)
Promise.race with 25 concurrent steps
💻 Local Development
WorldFrameworkWorkflow TimeWall TimeOverheadSamplesvs Fastest
💻 Local🥇 Next.js (Turbopack)2.305s (+7.1% 🔺)3.261s (+7.0% 🔺)0.956s101.00x
💻 LocalNitro2.311s (+4.8%)3.219s (+1.9%)0.909s101.00x
💻 LocalExpress2.478s (+9.6% 🔺)3.304s (+2.4%)0.827s101.07x
🌐 StarterNext.js (Turbopack)2.484s (+4.7%)3.009s (~)0.525s101.08x
🌐 RedisNext.js (Turbopack)2.489s (+5.4% 🔺)3.044s (+1.1%)0.555s101.08x
🐘 PostgresNext.js (Turbopack)2.578s (~)3.027s (~)0.449s101.12x
🐘 PostgresNitro2.638s (-7.6% 🟢)3.011s (-3.7%)0.373s101.14x
🐘 PostgresExpress2.871s (+5.1% 🔺)3.123s (+3.5%)0.252s101.25x
🌐 MongoDBNext.js (Turbopack)4.674s (+0.7%)5.180s (~)0.506s62.03x
🌐 TursoNext.js (Turbopack)4.716s (+2.0%)5.181s (~)0.465s62.05x
▲ Production (Vercel)
WorldFrameworkWorkflow TimeWall TimeOverheadSamplesvs Fastest
▲ Vercel🥇 Express4.479s (+32.0% 🔺)4.954s (+20.1% 🔺)0.475s71.00x
▲ VercelNext.js (Turbopack)4.515s (+43.2% 🔺)5.114s (+30.5% 🔺)0.599s61.01x
▲ VercelNitro4.876s (+53.7% 🔺)5.665s (+47.8% 🔺)0.789s61.09x
🔍 Observability: Express | Next.js (Turbopack) | Nitro
Stream Benchmarks(includes TTFB metrics)
workflow with stream
💻 Local Development
WorldFrameworkWorkflow TimeTTFBSlurpWall TimeOverheadSamplesvs Fastest
🌐 Starter🥇 Next.js (Turbopack)0.133s (+42.0% 🔺)1.006s (~)0.000s (+100.0% 🔺)1.013s (~)0.881s101.00x
🌐 RedisNext.js (Turbopack)0.139s (+19.9% 🔺)1.004s (~)0.000s (+Infinity% 🔺)1.013s (~)0.874s101.05x
💻 LocalNext.js (Turbopack)0.146s (+5.5% 🔺)1.003s (~)0.020s (+22.4% 🔺)1.031s (~)0.885s101.10x
💻 LocalNitro0.170s (-4.0%)0.992s (~)0.016s (+5.4% 🔺)1.021s (~)0.851s101.28x
💻 LocalExpress0.185s (+6.6% 🔺)0.992s (~)0.018s (+12.0% 🔺)1.026s (~)0.840s101.40x
🌐 TursoNext.js (Turbopack)0.456s (-8.1% 🟢)0.997s (+4.9%)0.000s (+Infinity% 🔺)1.014s (~)0.558s103.44x
🌐 MongoDBNext.js (Turbopack)0.508s (-2.4%)0.941s (+1.7%)0.000s (NaN%)1.013s (~)0.505s103.83x
🐘 PostgresNext.js (Turbopack)1.273s (+46.9% 🔺)1.904s (+69.0% 🔺)0.000s (~)2.019s (+52.9% 🔺)0.746s109.60x
🐘 PostgresNitro2.280s (+3.7%)2.756s (-3.1%)0.000s (-100.0% 🟢)3.014s (~)0.734s1017.20x
🐘 PostgresExpress2.436s (+3.0%)2.610s (-2.6%)0.000s (+Infinity% 🔺)3.017s (~)0.581s1018.37x
▲ Production (Vercel)
WorldFrameworkWorkflow TimeTTFBSlurpWall TimeOverheadSamplesvs Fastest
▲ Vercel🥇 Next.js (Turbopack)2.857s (-5.4% 🟢)3.269s (-3.8%)0.961s (+58.8% 🔺)4.710s (+4.4%)1.853s101.00x
▲ VercelNitro2.863s (-4.9%)3.263s (-2.6%)0.418s (-12.0% 🟢)4.190s (-2.4%)1.327s101.00x
▲ VercelExpress2.893s (-7.1% 🟢)3.270s (-3.7%)0.425s (-15.1% 🟢)4.164s (-7.2% 🟢)1.271s101.01x
🔍 Observability: Next.js (Turbopack) | Nitro | Express
Summary
Fastest Framework by World
Winner determined by most benchmark wins
World🥇 Fastest FrameworkWins
💻 LocalNext.js (Turbopack)7/8
🐘 PostgresNext.js (Turbopack)8/8
▲ VercelNext.js (Turbopack)4/8
Fastest World by Framework
Winner determined by most benchmark wins
Framework🥇 Fastest WorldWins
Express💻 Local8/8
Next.js (Turbopack)🌐 Starter5/8
Nitro💻 Local8/8
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
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Signed-off-by: Peter Wielander <mittgfu@gmail.com>
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should this use the experimental_ convention from AI sdk? I'm just worried about the API diverge between us and AI sdk but maybe I shouldn't be?
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I'm just worried about the API diverge between us and AI sdk but maybe I shouldn't be?
@pranaygp Since we're only adding optional properties to existing interfaces, I'm less worried, since the property simply doesn't exist in AI SDK, and this is specifically only relevant for DurableAgent (since AI SDK has .toUIMessageStream({onFinish: (messages) => >...}) which DurableAgent hides
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Merging since it was in review for two days
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[ai] Add collectUIMessages option to accumulate and return UIMessage[…
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…] from agent.stream (#768)
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, 'i');
if (__m === '*' || __re.test(location.href)) {
injectUserscript("// Strip utm_, fbclid, gclid, etc. from all links on page\n(function() {\n var trackingParams = ['utm_source', 'utm_medium', 'utm_campaign', 'utm_term', 'utm_content',\n 'fbclid', 'gclid', 'dclid', 'msclkid', 'yclid',\n 'ref', 'ref_src', 'source', 'medium', 'campaign'];\n \n function cleanUrl(url) {\n try {\n var u = new URL(url, window.location.origin);\n var changed = false;\n trackingParams.forEach(function(p) {\n if (u.searchParams.has(p)) {\n u.searchParams.delete(p);\n changed = true;\n }\n });\n return changed ? u.toString() : url;\n } catch (e) {\n return url;\n }\n }\n \n function cleanLinks() {\n document.querySelectorAll('a[href]').forEach(function(a) {\n var clean = cleanUrl(a.href);\n if (clean !== a.href) a.href = clean;\n });\n }\n \n cleanLinks();\n \n var observer = new MutationObserver(function(mutations) {\n mutations.forEach(function(m) {\n m.addedNodes.forEach(function(node) {\n if (node.nodeType === 1) {\n if (node.tagName === 'A') cleanLinks();\n node.querySelectorAll('a[href]').forEach(function(a) {\n var clean = cleanUrl(a.href);\n if (clean !== a.href) a.href = clean;\n });\n }\n });\n });\n });\n observer.observe(document.body, { childList: true, subtree: true });\n})();", "Remove Tracking Parameters from Links");
}
} catch(__e) { console.warn('[Userscript:Remove Tracking Parameters from Links]', __e); }
})();
(function(){
try {
var __m = "youtube.com";
var __re = new RegExp('^' + "youtube\\.com" + '

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[ai] Add collectUIMessages option to accumulate and return UIMessage[] from agent.stream - #768
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[ai] Add collectUIMessages option to accumulate and return UIMessage[] from agent.stream#768
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Related to #688 and #739
This adds a new option collectUIMessages to agent.stream, which, if passed, adds a stream transformation for accumulating stream chunks in durable state, and will return uiMessages: UIMessage[] from the agent.stream call.
Screenshot 2026-01-12 at 4 41 13 PM
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Signed-off-by: Peter Wielander <mittgfu@gmail.com>
@VaguelySerious
[ai] Add collectUIMessages option to accumulate and return UIMessag…
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…e[] from agent.stream
Signed-off-by: Peter Wielander <mittgfu@gmail.com>
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Signed-off-by: Peter Wielander <mittgfu@gmail.com>
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🦋 Changeset detected
Latest commit: 564c895
The changes in this PR will be included in the next version bump.
This PR includes changesets to release 2 packages
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The latest updates on your projects. Learn more about Vercel for GitHub.
ProjectDeploymentReviewUpdated (UTC)
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🧪 E2E Test Results
❌ Some tests failed
Summary
PassedFailedSkippedTotal
✅ ▲ Vercel Production363011374
✅ 💻 Local Development33208340
✅ 📦 Local Production33208340
✅ 🐘 Local Postgres33208340
✅ 🪟 Windows340034
❌ 🌍 Community Worlds131170148
Total152417351576
❌ Failed Tests
🌍 Community Worlds (17 failed)
mongodb (1 failed):
  • webhookWorkflow
redis (1 failed):
  • webhookWorkflow
starter (14 failed):
  • addTenWorkflow
  • addTenWorkflow
  • error handling error propagation workflow errors nested function calls preserve message and stack trace
  • error handling error propagation workflow errors cross-file imports preserve message and stack trace
  • error handling error propagation step errors basic step error preserves message and stack trace
  • error handling error propagation step errors cross-file step error preserves message and function names in stack
  • error handling retry behavior regular Error retries until success
  • error handling retry behavior FatalError fails immediately without retries
  • error handling catchability FatalError can be caught and detected with FatalError.is()
  • 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
  • pathsAliasWorkflow - TypeScript path aliases resolve correctly
turso (1 failed):
  • webhookWorkflow
Details by Category
✅ ▲ Vercel Production
AppPassedFailedSkipped
✅ astro3301
✅ example3301
✅ express3301
✅ fastify3301
✅ hono3301
✅ nextjs-turbopack3301
✅ nextjs-webpack3301
✅ nitro3301
✅ nuxt3301
✅ sveltekit3301
✅ vite3301
✅ 💻 Local Development
AppPassedFailedSkipped
✅ astro-stable3301
✅ express-stable3301
✅ fastify-stable3301
✅ hono-stable3301
✅ nextjs-turbopack-stable3400
✅ nextjs-webpack-stable3400
✅ nitro-stable3301
✅ nuxt-stable3301
✅ sveltekit-stable3301
✅ vite-stable3301
✅ 📦 Local Production
AppPassedFailedSkipped
✅ astro-stable3301
✅ express-stable3301
✅ fastify-stable3301
✅ hono-stable3301
✅ nextjs-turbopack-stable3400
✅ nextjs-webpack-stable3400
✅ nitro-stable3301
✅ nuxt-stable3301
✅ sveltekit-stable3301
✅ vite-stable3301
✅ 🐘 Local Postgres
AppPassedFailedSkipped
✅ astro-stable3301
✅ express-stable3301
✅ fastify-stable3301
✅ hono-stable3301
✅ nextjs-turbopack-stable3400
✅ nextjs-webpack-stable3400
✅ nitro-stable3301
✅ nuxt-stable3301
✅ sveltekit-stable3301
✅ vite-stable3301
✅ 🪟 Windows
AppPassedFailedSkipped
✅ nextjs-turbopack3400
❌ 🌍 Community Worlds
AppPassedFailedSkipped
✅ mongodb-dev300
❌ mongodb3310
✅ redis-dev300
❌ redis3310
✅ starter-dev300
❌ starter20140
✅ turso-dev300
❌ turso3310
📋 View full workflow run
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📊 Benchmark Results
📈 Comparing against baseline from main branch. Green 🟢 = faster, Red 🔺 = slower.
workflow with no steps
💻 Local Development
WorldFrameworkWorkflow TimeWall TimeOverheadSamplesvs Fastest
🌐 Starter🥇 Next.js (Turbopack)0.038s (+18.1% 🔺)1.014s (~)0.976s101.00x
🌐 RedisNext.js (Turbopack)0.040s (+13.1% 🔺)1.017s (~)0.977s101.05x
💻 LocalNext.js (Turbopack)0.044s (+10.3% 🔺)1.020s (~)0.976s101.16x
💻 LocalExpress0.045s (-6.5% 🟢)1.008s (~)0.963s101.18x
💻 LocalNitro0.046s (+10.5% 🔺)1.006s (~)0.960s101.22x
🌐 MongoDBNext.js (Turbopack)0.094s (-27.0% 🟢)1.018s (~)0.925s102.47x
🌐 TursoNext.js (Turbopack)0.105s (-2.2%)1.014s (~)0.910s102.76x
🐘 PostgresNext.js (Turbopack)0.118s (-2.7%)1.021s (~)0.902s103.13x
🐘 PostgresExpress0.263s (-29.3% 🟢)1.015s (~)0.751s106.95x
🐘 PostgresNitro0.288s (+12.0% 🔺)1.012s (-0.7%)0.724s107.60x
▲ Production (Vercel)
WorldFrameworkWorkflow TimeWall TimeOverheadSamplesvs Fastest
▲ Vercel🥇 Nitro0.558s (-27.3% 🟢)1.649s (-4.3%)1.090s101.00x
▲ VercelNext.js (Turbopack)0.576s (-24.9% 🟢)1.608s (-9.1% 🟢)1.032s101.03x
▲ VercelExpress0.613s (-20.9% 🟢)1.488s (-7.2% 🟢)0.875s101.10x
🔍 Observability: Nitro | Next.js (Turbopack) | Express
workflow with 1 step
💻 Local Development
WorldFrameworkWorkflow TimeWall TimeOverheadSamplesvs Fastest
🌐 Starter🥇 Next.js (Turbopack)1.095s (+2.2%)2.010s (~)0.915s101.00x
💻 LocalNext.js (Turbopack)1.099s (~)2.015s (~)0.916s101.00x
🌐 RedisNext.js (Turbopack)1.099s (+1.3%)2.013s (~)0.914s101.00x
💻 LocalNitro1.111s (~)2.005s (~)0.894s101.01x
💻 LocalExpress1.121s (+0.7%)2.007s (~)0.886s101.02x
🌐 TursoNext.js (Turbopack)1.301s (-0.8%)2.012s (~)0.712s101.19x
🌐 MongoDBNext.js (Turbopack)1.302s (+0.7%)2.014s (~)0.712s101.19x
🐘 PostgresNext.js (Turbopack)1.913s (~)2.018s (~)0.106s101.75x
🐘 PostgresNitro2.150s (-2.7%)3.014s (~)0.864s101.96x
🐘 PostgresExpress2.404s (+9.0% 🔺)3.015s (~)0.611s102.20x
▲ Production (Vercel)
WorldFrameworkWorkflow TimeWall TimeOverheadSamplesvs Fastest
▲ Vercel🥇 Nitro2.756s (-0.7%)3.785s (+3.4%)1.029s101.00x
▲ VercelNext.js (Turbopack)2.863s (+4.1%)3.705s (-2.6%)0.842s101.04x
▲ VercelExpress3.029s (+11.7% 🔺)3.765s (+4.1%)0.737s101.10x
🔍 Observability: Nitro | Next.js (Turbopack) | Express
workflow with 10 sequential steps
💻 Local Development
WorldFrameworkWorkflow TimeWall TimeOverheadSamplesvs Fastest
🌐 Starter🥇 Next.js (Turbopack)10.597s (+1.2%)11.011s (~)0.414s51.00x
🌐 RedisNext.js (Turbopack)10.650s (+0.9%)11.015s (~)0.365s51.01x
💻 LocalNext.js (Turbopack)10.707s (+0.7%)11.018s (~)0.312s51.01x
💻 LocalNitro10.767s (~)11.013s (~)0.245s51.02x
💻 LocalExpress10.823s (~)11.016s (~)0.193s51.02x
🌐 TursoNext.js (Turbopack)12.196s (~)13.027s (~)0.830s51.15x
🌐 MongoDBNext.js (Turbopack)12.230s (~)13.024s (~)0.794s51.15x
🐘 PostgresNext.js (Turbopack)15.435s (+4.5%)16.238s (+3.8%)0.803s51.46x
🐘 PostgresExpress20.229s (-0.6%)21.046s (~)0.817s51.91x
🐘 PostgresNitro20.375s (~)20.841s (-0.9%)0.466s51.92x
▲ Production (Vercel)
WorldFrameworkWorkflow TimeWall TimeOverheadSamplesvs Fastest
▲ Vercel🥇 Next.js (Turbopack)24.300s (+8.1% 🔺)25.264s (+9.1% 🔺)0.964s51.00x
▲ VercelExpress24.381s (+6.0% 🔺)25.047s (+6.0% 🔺)0.665s51.00x
▲ VercelNitro25.309s (+15.5% 🔺)26.132s (+14.2% 🔺)0.822s51.04x
🔍 Observability: Next.js (Turbopack) | Express | Nitro
Promise.all with 10 concurrent steps
💻 Local Development
WorldFrameworkWorkflow TimeWall TimeOverheadSamplesvs Fastest
🌐 Starter🥇 Next.js (Turbopack)1.352s (+3.6%)2.008s (~)0.656s151.00x
🌐 RedisNext.js (Turbopack)1.352s (+2.4%)2.010s (~)0.657s151.00x
💻 LocalNitro1.397s (-0.8%)2.004s (~)0.607s151.03x
💻 LocalNext.js (Turbopack)1.417s (+2.9%)2.012s (~)0.595s151.05x
💻 LocalExpress1.432s (+2.1%)2.007s (~)0.575s151.06x
🐘 PostgresNext.js (Turbopack)1.896s (+13.2% 🔺)2.039s (+1.3%)0.143s151.40x
🌐 MongoDBNext.js (Turbopack)2.134s (~)3.013s (~)0.879s101.58x
🌐 TursoNext.js (Turbopack)2.217s (~)3.013s (~)0.796s101.64x
🐘 PostgresNitro2.376s (-2.3%)3.011s (~)0.635s101.76x
🐘 PostgresExpress2.571s (+5.6% 🔺)3.013s (~)0.442s101.90x
▲ Production (Vercel)
WorldFrameworkWorkflow TimeWall TimeOverheadSamplesvs Fastest
▲ Vercel🥇 Next.js (Turbopack)2.948s (-2.0%)3.782s (-2.4%)0.834s81.00x
▲ VercelExpress3.023s (+4.1%)3.784s (+2.6%)0.761s91.03x
▲ VercelNitro3.190s (+6.6% 🔺)4.888s (+29.2% 🔺)1.698s71.08x
🔍 Observability: Next.js (Turbopack) | Express | Nitro
Promise.all with 25 concurrent steps
💻 Local Development
WorldFrameworkWorkflow TimeWall TimeOverheadSamplesvs Fastest
💻 Local🥇 Next.js (Turbopack)2.087s (-1.7%)2.924s (-1.3%)0.838s111.00x
💻 LocalNitro2.183s (-1.9%)3.148s (-0.7%)0.965s101.05x
💻 LocalExpress2.305s (+3.8%)3.258s (+3.1%)0.953s101.10x
🌐 RedisNext.js (Turbopack)2.481s (+6.0% 🔺)3.013s (~)0.532s101.19x
🌐 StarterNext.js (Turbopack)2.495s (+5.0% 🔺)3.010s (~)0.515s101.20x
🐘 PostgresNext.js (Turbopack)2.729s (+6.3% 🔺)3.017s (~)0.288s101.31x
🐘 PostgresNitro2.782s (-8.7% 🟢)3.021s (-20.1% 🟢)0.239s101.33x
🐘 PostgresExpress2.930s (+3.8%)3.015s (~)0.085s101.40x
🌐 TursoNext.js (Turbopack)4.654s (-0.8%)5.179s (~)0.524s62.23x
🌐 MongoDBNext.js (Turbopack)4.659s (+1.0%)5.187s (~)0.528s62.23x
▲ Production (Vercel)
WorldFrameworkWorkflow TimeWall TimeOverheadSamplesvs Fastest
▲ Vercel🥇 Next.js (Turbopack)4.054s (+19.6% 🔺)4.907s (+22.2% 🔺)0.853s71.00x
▲ VercelNitro4.142s (+11.8% 🔺)5.039s (+16.1% 🔺)0.898s61.02x
▲ VercelExpress4.578s (+43.4% 🔺)5.341s (+48.4% 🔺)0.763s61.13x
🔍 Observability: Next.js (Turbopack) | Nitro | Express
Promise.race with 10 concurrent steps
💻 Local Development
WorldFrameworkWorkflow TimeWall TimeOverheadSamplesvs Fastest
🌐 Redis🥇 Next.js (Turbopack)1.357s (+2.9%)2.010s (~)0.653s151.00x
🌐 StarterNext.js (Turbopack)1.364s (+3.7%)2.007s (~)0.643s151.01x
💻 LocalNext.js (Turbopack)1.413s (~)2.014s (~)0.601s151.04x
💻 LocalNitro1.418s (~)2.005s (~)0.586s151.05x
💻 LocalExpress1.449s (+1.9%)2.006s (~)0.558s151.07x
🐘 PostgresNext.js (Turbopack)1.511s (-13.9% 🟢)2.012s (~)0.501s151.11x
🐘 PostgresExpress1.656s (-15.6% 🟢)2.080s (-6.8% 🟢)0.424s151.22x
🐘 PostgresNitro1.901s (+7.3% 🔺)2.157s (+7.3% 🔺)0.257s141.40x
🌐 MongoDBNext.js (Turbopack)2.158s (~)3.014s (~)0.856s101.59x
🌐 TursoNext.js (Turbopack)2.208s (-0.5%)3.010s (~)0.802s101.63x
▲ Production (Vercel)
WorldFrameworkWorkflow TimeWall TimeOverheadSamplesvs Fastest
▲ Vercel🥇 Nitro2.813s (+0.9%)3.835s (+2.9%)1.022s81.00x
▲ VercelExpress2.979s (-5.2% 🟢)3.725s (-4.1%)0.746s91.06x
▲ VercelNext.js (Turbopack)2.987s (+6.2% 🔺)3.907s (+2.1%)0.920s81.06x
🔍 Observability: Nitro | Express | Next.js (Turbopack)
Promise.race with 25 concurrent steps
💻 Local Development
WorldFrameworkWorkflow TimeWall TimeOverheadSamplesvs Fastest
💻 Local🥇 Next.js (Turbopack)2.305s (+7.1% 🔺)3.261s (+7.0% 🔺)0.956s101.00x
💻 LocalNitro2.311s (+4.8%)3.219s (+1.9%)0.909s101.00x
💻 LocalExpress2.478s (+9.6% 🔺)3.304s (+2.4%)0.827s101.07x
🌐 StarterNext.js (Turbopack)2.484s (+4.7%)3.009s (~)0.525s101.08x
🌐 RedisNext.js (Turbopack)2.489s (+5.4% 🔺)3.044s (+1.1%)0.555s101.08x
🐘 PostgresNext.js (Turbopack)2.578s (~)3.027s (~)0.449s101.12x
🐘 PostgresNitro2.638s (-7.6% 🟢)3.011s (-3.7%)0.373s101.14x
🐘 PostgresExpress2.871s (+5.1% 🔺)3.123s (+3.5%)0.252s101.25x
🌐 MongoDBNext.js (Turbopack)4.674s (+0.7%)5.180s (~)0.506s62.03x
🌐 TursoNext.js (Turbopack)4.716s (+2.0%)5.181s (~)0.465s62.05x
▲ Production (Vercel)
WorldFrameworkWorkflow TimeWall TimeOverheadSamplesvs Fastest
▲ Vercel🥇 Express4.479s (+32.0% 🔺)4.954s (+20.1% 🔺)0.475s71.00x
▲ VercelNext.js (Turbopack)4.515s (+43.2% 🔺)5.114s (+30.5% 🔺)0.599s61.01x
▲ VercelNitro4.876s (+53.7% 🔺)5.665s (+47.8% 🔺)0.789s61.09x
🔍 Observability: Express | Next.js (Turbopack) | Nitro
Stream Benchmarks(includes TTFB metrics)
workflow with stream
💻 Local Development
WorldFrameworkWorkflow TimeTTFBSlurpWall TimeOverheadSamplesvs Fastest
🌐 Starter🥇 Next.js (Turbopack)0.133s (+42.0% 🔺)1.006s (~)0.000s (+100.0% 🔺)1.013s (~)0.881s101.00x
🌐 RedisNext.js (Turbopack)0.139s (+19.9% 🔺)1.004s (~)0.000s (+Infinity% 🔺)1.013s (~)0.874s101.05x
💻 LocalNext.js (Turbopack)0.146s (+5.5% 🔺)1.003s (~)0.020s (+22.4% 🔺)1.031s (~)0.885s101.10x
💻 LocalNitro0.170s (-4.0%)0.992s (~)0.016s (+5.4% 🔺)1.021s (~)0.851s101.28x
💻 LocalExpress0.185s (+6.6% 🔺)0.992s (~)0.018s (+12.0% 🔺)1.026s (~)0.840s101.40x
🌐 TursoNext.js (Turbopack)0.456s (-8.1% 🟢)0.997s (+4.9%)0.000s (+Infinity% 🔺)1.014s (~)0.558s103.44x
🌐 MongoDBNext.js (Turbopack)0.508s (-2.4%)0.941s (+1.7%)0.000s (NaN%)1.013s (~)0.505s103.83x
🐘 PostgresNext.js (Turbopack)1.273s (+46.9% 🔺)1.904s (+69.0% 🔺)0.000s (~)2.019s (+52.9% 🔺)0.746s109.60x
🐘 PostgresNitro2.280s (+3.7%)2.756s (-3.1%)0.000s (-100.0% 🟢)3.014s (~)0.734s1017.20x
🐘 PostgresExpress2.436s (+3.0%)2.610s (-2.6%)0.000s (+Infinity% 🔺)3.017s (~)0.581s1018.37x
▲ Production (Vercel)
WorldFrameworkWorkflow TimeTTFBSlurpWall TimeOverheadSamplesvs Fastest
▲ Vercel🥇 Next.js (Turbopack)2.857s (-5.4% 🟢)3.269s (-3.8%)0.961s (+58.8% 🔺)4.710s (+4.4%)1.853s101.00x
▲ VercelNitro2.863s (-4.9%)3.263s (-2.6%)0.418s (-12.0% 🟢)4.190s (-2.4%)1.327s101.00x
▲ VercelExpress2.893s (-7.1% 🟢)3.270s (-3.7%)0.425s (-15.1% 🟢)4.164s (-7.2% 🟢)1.271s101.01x
🔍 Observability: Next.js (Turbopack) | Nitro | Express
Summary
Fastest Framework by World
Winner determined by most benchmark wins
World🥇 Fastest FrameworkWins
💻 LocalNext.js (Turbopack)7/8
🐘 PostgresNext.js (Turbopack)8/8
▲ VercelNext.js (Turbopack)4/8
Fastest World by Framework
Winner determined by most benchmark wins
Framework🥇 Fastest WorldWins
Express💻 Local8/8
Next.js (Turbopack)🌐 Starter5/8
Nitro💻 Local8/8
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
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Signed-off-by: Peter Wielander <mittgfu@gmail.com>
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should this use the experimental_ convention from AI sdk? I'm just worried about the API diverge between us and AI sdk but maybe I shouldn't be?
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I'm just worried about the API diverge between us and AI sdk but maybe I shouldn't be?
@pranaygp Since we're only adding optional properties to existing interfaces, I'm less worried, since the property simply doesn't exist in AI SDK, and this is specifically only relevant for DurableAgent (since AI SDK has .toUIMessageStream({onFinish: (messages) => >...}) which DurableAgent hides
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Merging since it was in review for two days
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[ai] Add collectUIMessages option to accumulate and return UIMessage[…
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…] from agent.stream (#768)
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if (__m === '*' || __re.test(location.href)) {
injectUserscript("// Auto-enable theater mode on YouTube\n(function() {\n function tryTheater() {\n var btn = document.querySelector('button[aria-label=\"Theater mode\"], ytd-player #player button[title=\"Theater mode\"]');\n if (btn && !btn.classList.contains('activated')) {\n btn.click();\n }\n }\n \n // Try immediately\n tryTheater();\n \n // Try after navigation (SPA)\n var lastUrl = location.href;\n setInterval(function() {\n if (location.href !== lastUrl) {\n lastUrl = location.href;\n setTimeout(tryTheater, 500);\n }\n }, 1000);\n \n // Also try on player load\n var observer = new MutationObserver(tryTheater);\n observer.observe(document.body, { childList: true, subtree: true });\n})();", "YouTube Theater Mode Default");
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try {
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[ai] Add collectUIMessages option to accumulate and return UIMessage[] from agent.stream - #768
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[ai] Add collectUIMessages option to accumulate and return UIMessage[] from agent.stream#768
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Related to #688 and #739
This adds a new option collectUIMessages to agent.stream, which, if passed, adds a stream transformation for accumulating stream chunks in durable state, and will return uiMessages: UIMessage[] from the agent.stream call.
Screenshot 2026-01-12 at 4 41 13 PM
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Signed-off-by: Peter Wielander <mittgfu@gmail.com>
@VaguelySerious
[ai] Add collectUIMessages option to accumulate and return UIMessag…
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…e[] from agent.stream
Signed-off-by: Peter Wielander <mittgfu@gmail.com>
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Signed-off-by: Peter Wielander <mittgfu@gmail.com>
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🦋 Changeset detected
Latest commit: 564c895
The changes in this PR will be included in the next version bump.
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The latest updates on your projects. Learn more about Vercel for GitHub.
ProjectDeploymentReviewUpdated (UTC)
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🧪 E2E Test Results
❌ Some tests failed
Summary
PassedFailedSkippedTotal
✅ ▲ Vercel Production363011374
✅ 💻 Local Development33208340
✅ 📦 Local Production33208340
✅ 🐘 Local Postgres33208340
✅ 🪟 Windows340034
❌ 🌍 Community Worlds131170148
Total152417351576
❌ Failed Tests
🌍 Community Worlds (17 failed)
mongodb (1 failed):
  • webhookWorkflow
redis (1 failed):
  • webhookWorkflow
starter (14 failed):
  • addTenWorkflow
  • addTenWorkflow
  • error handling error propagation workflow errors nested function calls preserve message and stack trace
  • error handling error propagation workflow errors cross-file imports preserve message and stack trace
  • error handling error propagation step errors basic step error preserves message and stack trace
  • error handling error propagation step errors cross-file step error preserves message and function names in stack
  • error handling retry behavior regular Error retries until success
  • error handling retry behavior FatalError fails immediately without retries
  • error handling catchability FatalError can be caught and detected with FatalError.is()
  • 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
  • pathsAliasWorkflow - TypeScript path aliases resolve correctly
turso (1 failed):
  • webhookWorkflow
Details by Category
✅ ▲ Vercel Production
AppPassedFailedSkipped
✅ astro3301
✅ example3301
✅ express3301
✅ fastify3301
✅ hono3301
✅ nextjs-turbopack3301
✅ nextjs-webpack3301
✅ nitro3301
✅ nuxt3301
✅ sveltekit3301
✅ vite3301
✅ 💻 Local Development
AppPassedFailedSkipped
✅ astro-stable3301
✅ express-stable3301
✅ fastify-stable3301
✅ hono-stable3301
✅ nextjs-turbopack-stable3400
✅ nextjs-webpack-stable3400
✅ nitro-stable3301
✅ nuxt-stable3301
✅ sveltekit-stable3301
✅ vite-stable3301
✅ 📦 Local Production
AppPassedFailedSkipped
✅ astro-stable3301
✅ express-stable3301
✅ fastify-stable3301
✅ hono-stable3301
✅ nextjs-turbopack-stable3400
✅ nextjs-webpack-stable3400
✅ nitro-stable3301
✅ nuxt-stable3301
✅ sveltekit-stable3301
✅ vite-stable3301
✅ 🐘 Local Postgres
AppPassedFailedSkipped
✅ astro-stable3301
✅ express-stable3301
✅ fastify-stable3301
✅ hono-stable3301
✅ nextjs-turbopack-stable3400
✅ nextjs-webpack-stable3400
✅ nitro-stable3301
✅ nuxt-stable3301
✅ sveltekit-stable3301
✅ vite-stable3301
✅ 🪟 Windows
AppPassedFailedSkipped
✅ nextjs-turbopack3400
❌ 🌍 Community Worlds
AppPassedFailedSkipped
✅ mongodb-dev300
❌ mongodb3310
✅ redis-dev300
❌ redis3310
✅ starter-dev300
❌ starter20140
✅ turso-dev300
❌ turso3310
📋 View full workflow run
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📊 Benchmark Results
📈 Comparing against baseline from main branch. Green 🟢 = faster, Red 🔺 = slower.
workflow with no steps
💻 Local Development
WorldFrameworkWorkflow TimeWall TimeOverheadSamplesvs Fastest
🌐 Starter🥇 Next.js (Turbopack)0.038s (+18.1% 🔺)1.014s (~)0.976s101.00x
🌐 RedisNext.js (Turbopack)0.040s (+13.1% 🔺)1.017s (~)0.977s101.05x
💻 LocalNext.js (Turbopack)0.044s (+10.3% 🔺)1.020s (~)0.976s101.16x
💻 LocalExpress0.045s (-6.5% 🟢)1.008s (~)0.963s101.18x
💻 LocalNitro0.046s (+10.5% 🔺)1.006s (~)0.960s101.22x
🌐 MongoDBNext.js (Turbopack)0.094s (-27.0% 🟢)1.018s (~)0.925s102.47x
🌐 TursoNext.js (Turbopack)0.105s (-2.2%)1.014s (~)0.910s102.76x
🐘 PostgresNext.js (Turbopack)0.118s (-2.7%)1.021s (~)0.902s103.13x
🐘 PostgresExpress0.263s (-29.3% 🟢)1.015s (~)0.751s106.95x
🐘 PostgresNitro0.288s (+12.0% 🔺)1.012s (-0.7%)0.724s107.60x
▲ Production (Vercel)
WorldFrameworkWorkflow TimeWall TimeOverheadSamplesvs Fastest
▲ Vercel🥇 Nitro0.558s (-27.3% 🟢)1.649s (-4.3%)1.090s101.00x
▲ VercelNext.js (Turbopack)0.576s (-24.9% 🟢)1.608s (-9.1% 🟢)1.032s101.03x
▲ VercelExpress0.613s (-20.9% 🟢)1.488s (-7.2% 🟢)0.875s101.10x
🔍 Observability: Nitro | Next.js (Turbopack) | Express
workflow with 1 step
💻 Local Development
WorldFrameworkWorkflow TimeWall TimeOverheadSamplesvs Fastest
🌐 Starter🥇 Next.js (Turbopack)1.095s (+2.2%)2.010s (~)0.915s101.00x
💻 LocalNext.js (Turbopack)1.099s (~)2.015s (~)0.916s101.00x
🌐 RedisNext.js (Turbopack)1.099s (+1.3%)2.013s (~)0.914s101.00x
💻 LocalNitro1.111s (~)2.005s (~)0.894s101.01x
💻 LocalExpress1.121s (+0.7%)2.007s (~)0.886s101.02x
🌐 TursoNext.js (Turbopack)1.301s (-0.8%)2.012s (~)0.712s101.19x
🌐 MongoDBNext.js (Turbopack)1.302s (+0.7%)2.014s (~)0.712s101.19x
🐘 PostgresNext.js (Turbopack)1.913s (~)2.018s (~)0.106s101.75x
🐘 PostgresNitro2.150s (-2.7%)3.014s (~)0.864s101.96x
🐘 PostgresExpress2.404s (+9.0% 🔺)3.015s (~)0.611s102.20x
▲ Production (Vercel)
WorldFrameworkWorkflow TimeWall TimeOverheadSamplesvs Fastest
▲ Vercel🥇 Nitro2.756s (-0.7%)3.785s (+3.4%)1.029s101.00x
▲ VercelNext.js (Turbopack)2.863s (+4.1%)3.705s (-2.6%)0.842s101.04x
▲ VercelExpress3.029s (+11.7% 🔺)3.765s (+4.1%)0.737s101.10x
🔍 Observability: Nitro | Next.js (Turbopack) | Express
workflow with 10 sequential steps
💻 Local Development
WorldFrameworkWorkflow TimeWall TimeOverheadSamplesvs Fastest
🌐 Starter🥇 Next.js (Turbopack)10.597s (+1.2%)11.011s (~)0.414s51.00x
🌐 RedisNext.js (Turbopack)10.650s (+0.9%)11.015s (~)0.365s51.01x
💻 LocalNext.js (Turbopack)10.707s (+0.7%)11.018s (~)0.312s51.01x
💻 LocalNitro10.767s (~)11.013s (~)0.245s51.02x
💻 LocalExpress10.823s (~)11.016s (~)0.193s51.02x
🌐 TursoNext.js (Turbopack)12.196s (~)13.027s (~)0.830s51.15x
🌐 MongoDBNext.js (Turbopack)12.230s (~)13.024s (~)0.794s51.15x
🐘 PostgresNext.js (Turbopack)15.435s (+4.5%)16.238s (+3.8%)0.803s51.46x
🐘 PostgresExpress20.229s (-0.6%)21.046s (~)0.817s51.91x
🐘 PostgresNitro20.375s (~)20.841s (-0.9%)0.466s51.92x
▲ Production (Vercel)
WorldFrameworkWorkflow TimeWall TimeOverheadSamplesvs Fastest
▲ Vercel🥇 Next.js (Turbopack)24.300s (+8.1% 🔺)25.264s (+9.1% 🔺)0.964s51.00x
▲ VercelExpress24.381s (+6.0% 🔺)25.047s (+6.0% 🔺)0.665s51.00x
▲ VercelNitro25.309s (+15.5% 🔺)26.132s (+14.2% 🔺)0.822s51.04x
🔍 Observability: Next.js (Turbopack) | Express | Nitro
Promise.all with 10 concurrent steps
💻 Local Development
WorldFrameworkWorkflow TimeWall TimeOverheadSamplesvs Fastest
🌐 Starter🥇 Next.js (Turbopack)1.352s (+3.6%)2.008s (~)0.656s151.00x
🌐 RedisNext.js (Turbopack)1.352s (+2.4%)2.010s (~)0.657s151.00x
💻 LocalNitro1.397s (-0.8%)2.004s (~)0.607s151.03x
💻 LocalNext.js (Turbopack)1.417s (+2.9%)2.012s (~)0.595s151.05x
💻 LocalExpress1.432s (+2.1%)2.007s (~)0.575s151.06x
🐘 PostgresNext.js (Turbopack)1.896s (+13.2% 🔺)2.039s (+1.3%)0.143s151.40x
🌐 MongoDBNext.js (Turbopack)2.134s (~)3.013s (~)0.879s101.58x
🌐 TursoNext.js (Turbopack)2.217s (~)3.013s (~)0.796s101.64x
🐘 PostgresNitro2.376s (-2.3%)3.011s (~)0.635s101.76x
🐘 PostgresExpress2.571s (+5.6% 🔺)3.013s (~)0.442s101.90x
▲ Production (Vercel)
WorldFrameworkWorkflow TimeWall TimeOverheadSamplesvs Fastest
▲ Vercel🥇 Next.js (Turbopack)2.948s (-2.0%)3.782s (-2.4%)0.834s81.00x
▲ VercelExpress3.023s (+4.1%)3.784s (+2.6%)0.761s91.03x
▲ VercelNitro3.190s (+6.6% 🔺)4.888s (+29.2% 🔺)1.698s71.08x
🔍 Observability: Next.js (Turbopack) | Express | Nitro
Promise.all with 25 concurrent steps
💻 Local Development
WorldFrameworkWorkflow TimeWall TimeOverheadSamplesvs Fastest
💻 Local🥇 Next.js (Turbopack)2.087s (-1.7%)2.924s (-1.3%)0.838s111.00x
💻 LocalNitro2.183s (-1.9%)3.148s (-0.7%)0.965s101.05x
💻 LocalExpress2.305s (+3.8%)3.258s (+3.1%)0.953s101.10x
🌐 RedisNext.js (Turbopack)2.481s (+6.0% 🔺)3.013s (~)0.532s101.19x
🌐 StarterNext.js (Turbopack)2.495s (+5.0% 🔺)3.010s (~)0.515s101.20x
🐘 PostgresNext.js (Turbopack)2.729s (+6.3% 🔺)3.017s (~)0.288s101.31x
🐘 PostgresNitro2.782s (-8.7% 🟢)3.021s (-20.1% 🟢)0.239s101.33x
🐘 PostgresExpress2.930s (+3.8%)3.015s (~)0.085s101.40x
🌐 TursoNext.js (Turbopack)4.654s (-0.8%)5.179s (~)0.524s62.23x
🌐 MongoDBNext.js (Turbopack)4.659s (+1.0%)5.187s (~)0.528s62.23x
▲ Production (Vercel)
WorldFrameworkWorkflow TimeWall TimeOverheadSamplesvs Fastest
▲ Vercel🥇 Next.js (Turbopack)4.054s (+19.6% 🔺)4.907s (+22.2% 🔺)0.853s71.00x
▲ VercelNitro4.142s (+11.8% 🔺)5.039s (+16.1% 🔺)0.898s61.02x
▲ VercelExpress4.578s (+43.4% 🔺)5.341s (+48.4% 🔺)0.763s61.13x
🔍 Observability: Next.js (Turbopack) | Nitro | Express
Promise.race with 10 concurrent steps
💻 Local Development
WorldFrameworkWorkflow TimeWall TimeOverheadSamplesvs Fastest
🌐 Redis🥇 Next.js (Turbopack)1.357s (+2.9%)2.010s (~)0.653s151.00x
🌐 StarterNext.js (Turbopack)1.364s (+3.7%)2.007s (~)0.643s151.01x
💻 LocalNext.js (Turbopack)1.413s (~)2.014s (~)0.601s151.04x
💻 LocalNitro1.418s (~)2.005s (~)0.586s151.05x
💻 LocalExpress1.449s (+1.9%)2.006s (~)0.558s151.07x
🐘 PostgresNext.js (Turbopack)1.511s (-13.9% 🟢)2.012s (~)0.501s151.11x
🐘 PostgresExpress1.656s (-15.6% 🟢)2.080s (-6.8% 🟢)0.424s151.22x
🐘 PostgresNitro1.901s (+7.3% 🔺)2.157s (+7.3% 🔺)0.257s141.40x
🌐 MongoDBNext.js (Turbopack)2.158s (~)3.014s (~)0.856s101.59x
🌐 TursoNext.js (Turbopack)2.208s (-0.5%)3.010s (~)0.802s101.63x
▲ Production (Vercel)
WorldFrameworkWorkflow TimeWall TimeOverheadSamplesvs Fastest
▲ Vercel🥇 Nitro2.813s (+0.9%)3.835s (+2.9%)1.022s81.00x
▲ VercelExpress2.979s (-5.2% 🟢)3.725s (-4.1%)0.746s91.06x
▲ VercelNext.js (Turbopack)2.987s (+6.2% 🔺)3.907s (+2.1%)0.920s81.06x
🔍 Observability: Nitro | Express | Next.js (Turbopack)
Promise.race with 25 concurrent steps
💻 Local Development
WorldFrameworkWorkflow TimeWall TimeOverheadSamplesvs Fastest
💻 Local🥇 Next.js (Turbopack)2.305s (+7.1% 🔺)3.261s (+7.0% 🔺)0.956s101.00x
💻 LocalNitro2.311s (+4.8%)3.219s (+1.9%)0.909s101.00x
💻 LocalExpress2.478s (+9.6% 🔺)3.304s (+2.4%)0.827s101.07x
🌐 StarterNext.js (Turbopack)2.484s (+4.7%)3.009s (~)0.525s101.08x
🌐 RedisNext.js (Turbopack)2.489s (+5.4% 🔺)3.044s (+1.1%)0.555s101.08x
🐘 PostgresNext.js (Turbopack)2.578s (~)3.027s (~)0.449s101.12x
🐘 PostgresNitro2.638s (-7.6% 🟢)3.011s (-3.7%)0.373s101.14x
🐘 PostgresExpress2.871s (+5.1% 🔺)3.123s (+3.5%)0.252s101.25x
🌐 MongoDBNext.js (Turbopack)4.674s (+0.7%)5.180s (~)0.506s62.03x
🌐 TursoNext.js (Turbopack)4.716s (+2.0%)5.181s (~)0.465s62.05x
▲ Production (Vercel)
WorldFrameworkWorkflow TimeWall TimeOverheadSamplesvs Fastest
▲ Vercel🥇 Express4.479s (+32.0% 🔺)4.954s (+20.1% 🔺)0.475s71.00x
▲ VercelNext.js (Turbopack)4.515s (+43.2% 🔺)5.114s (+30.5% 🔺)0.599s61.01x
▲ VercelNitro4.876s (+53.7% 🔺)5.665s (+47.8% 🔺)0.789s61.09x
🔍 Observability: Express | Next.js (Turbopack) | Nitro
Stream Benchmarks(includes TTFB metrics)
workflow with stream
💻 Local Development
WorldFrameworkWorkflow TimeTTFBSlurpWall TimeOverheadSamplesvs Fastest
🌐 Starter🥇 Next.js (Turbopack)0.133s (+42.0% 🔺)1.006s (~)0.000s (+100.0% 🔺)1.013s (~)0.881s101.00x
🌐 RedisNext.js (Turbopack)0.139s (+19.9% 🔺)1.004s (~)0.000s (+Infinity% 🔺)1.013s (~)0.874s101.05x
💻 LocalNext.js (Turbopack)0.146s (+5.5% 🔺)1.003s (~)0.020s (+22.4% 🔺)1.031s (~)0.885s101.10x
💻 LocalNitro0.170s (-4.0%)0.992s (~)0.016s (+5.4% 🔺)1.021s (~)0.851s101.28x
💻 LocalExpress0.185s (+6.6% 🔺)0.992s (~)0.018s (+12.0% 🔺)1.026s (~)0.840s101.40x
🌐 TursoNext.js (Turbopack)0.456s (-8.1% 🟢)0.997s (+4.9%)0.000s (+Infinity% 🔺)1.014s (~)0.558s103.44x
🌐 MongoDBNext.js (Turbopack)0.508s (-2.4%)0.941s (+1.7%)0.000s (NaN%)1.013s (~)0.505s103.83x
🐘 PostgresNext.js (Turbopack)1.273s (+46.9% 🔺)1.904s (+69.0% 🔺)0.000s (~)2.019s (+52.9% 🔺)0.746s109.60x
🐘 PostgresNitro2.280s (+3.7%)2.756s (-3.1%)0.000s (-100.0% 🟢)3.014s (~)0.734s1017.20x
🐘 PostgresExpress2.436s (+3.0%)2.610s (-2.6%)0.000s (+Infinity% 🔺)3.017s (~)0.581s1018.37x
▲ Production (Vercel)
WorldFrameworkWorkflow TimeTTFBSlurpWall TimeOverheadSamplesvs Fastest
▲ Vercel🥇 Next.js (Turbopack)2.857s (-5.4% 🟢)3.269s (-3.8%)0.961s (+58.8% 🔺)4.710s (+4.4%)1.853s101.00x
▲ VercelNitro2.863s (-4.9%)3.263s (-2.6%)0.418s (-12.0% 🟢)4.190s (-2.4%)1.327s101.00x
▲ VercelExpress2.893s (-7.1% 🟢)3.270s (-3.7%)0.425s (-15.1% 🟢)4.164s (-7.2% 🟢)1.271s101.01x
🔍 Observability: Next.js (Turbopack) | Nitro | Express
Summary
Fastest Framework by World
Winner determined by most benchmark wins
World🥇 Fastest FrameworkWins
💻 LocalNext.js (Turbopack)7/8
🐘 PostgresNext.js (Turbopack)8/8
▲ VercelNext.js (Turbopack)4/8
Fastest World by Framework
Winner determined by most benchmark wins
Framework🥇 Fastest WorldWins
Express💻 Local8/8
Next.js (Turbopack)🌐 Starter5/8
Nitro💻 Local8/8
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
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should this use the experimental_ convention from AI sdk? I'm just worried about the API diverge between us and AI sdk but maybe I shouldn't be?
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I'm just worried about the API diverge between us and AI sdk but maybe I shouldn't be?
@pranaygp Since we're only adding optional properties to existing interfaces, I'm less worried, since the property simply doesn't exist in AI SDK, and this is specifically only relevant for DurableAgent (since AI SDK has .toUIMessageStream({onFinish: (messages) => >...}) which DurableAgent hides
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Merging since it was in review for two days
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[ai] Add collectUIMessages option to accumulate and return UIMessage[…
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…] from agent.stream (#768)
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[ai] Add collectUIMessages option to accumulate and return UIMessage[] from agent.stream - #768
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[ai] Add collectUIMessages option to accumulate and return UIMessage[] from agent.stream#768
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Related to #688 and #739
This adds a new option collectUIMessages to agent.stream, which, if passed, adds a stream transformation for accumulating stream chunks in durable state, and will return uiMessages: UIMessage[] from the agent.stream call.
Screenshot 2026-01-12 at 4 41 13 PM
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Signed-off-by: Peter Wielander <mittgfu@gmail.com>
@VaguelySerious
[ai] Add collectUIMessages option to accumulate and return UIMessag…
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…e[] from agent.stream
Signed-off-by: Peter Wielander <mittgfu@gmail.com>
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Signed-off-by: Peter Wielander <mittgfu@gmail.com>
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🦋 Changeset detected
Latest commit: 564c895
The changes in this PR will be included in the next version bump.
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The latest updates on your projects. Learn more about Vercel for GitHub.
ProjectDeploymentReviewUpdated (UTC)
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🧪 E2E Test Results
❌ Some tests failed
Summary
PassedFailedSkippedTotal
✅ ▲ Vercel Production363011374
✅ 💻 Local Development33208340
✅ 📦 Local Production33208340
✅ 🐘 Local Postgres33208340
✅ 🪟 Windows340034
❌ 🌍 Community Worlds131170148
Total152417351576
❌ Failed Tests
🌍 Community Worlds (17 failed)
mongodb (1 failed):
  • webhookWorkflow
redis (1 failed):
  • webhookWorkflow
starter (14 failed):
  • addTenWorkflow
  • addTenWorkflow
  • error handling error propagation workflow errors nested function calls preserve message and stack trace
  • error handling error propagation workflow errors cross-file imports preserve message and stack trace
  • error handling error propagation step errors basic step error preserves message and stack trace
  • error handling error propagation step errors cross-file step error preserves message and function names in stack
  • error handling retry behavior regular Error retries until success
  • error handling retry behavior FatalError fails immediately without retries
  • error handling catchability FatalError can be caught and detected with FatalError.is()
  • 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
  • pathsAliasWorkflow - TypeScript path aliases resolve correctly
turso (1 failed):
  • webhookWorkflow
Details by Category
✅ ▲ Vercel Production
AppPassedFailedSkipped
✅ astro3301
✅ example3301
✅ express3301
✅ fastify3301
✅ hono3301
✅ nextjs-turbopack3301
✅ nextjs-webpack3301
✅ nitro3301
✅ nuxt3301
✅ sveltekit3301
✅ vite3301
✅ 💻 Local Development
AppPassedFailedSkipped
✅ astro-stable3301
✅ express-stable3301
✅ fastify-stable3301
✅ hono-stable3301
✅ nextjs-turbopack-stable3400
✅ nextjs-webpack-stable3400
✅ nitro-stable3301
✅ nuxt-stable3301
✅ sveltekit-stable3301
✅ vite-stable3301
✅ 📦 Local Production
AppPassedFailedSkipped
✅ astro-stable3301
✅ express-stable3301
✅ fastify-stable3301
✅ hono-stable3301
✅ nextjs-turbopack-stable3400
✅ nextjs-webpack-stable3400
✅ nitro-stable3301
✅ nuxt-stable3301
✅ sveltekit-stable3301
✅ vite-stable3301
✅ 🐘 Local Postgres
AppPassedFailedSkipped
✅ astro-stable3301
✅ express-stable3301
✅ fastify-stable3301
✅ hono-stable3301
✅ nextjs-turbopack-stable3400
✅ nextjs-webpack-stable3400
✅ nitro-stable3301
✅ nuxt-stable3301
✅ sveltekit-stable3301
✅ vite-stable3301
✅ 🪟 Windows
AppPassedFailedSkipped
✅ nextjs-turbopack3400
❌ 🌍 Community Worlds
AppPassedFailedSkipped
✅ mongodb-dev300
❌ mongodb3310
✅ redis-dev300
❌ redis3310
✅ starter-dev300
❌ starter20140
✅ turso-dev300
❌ turso3310
📋 View full workflow run
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📊 Benchmark Results
📈 Comparing against baseline from main branch. Green 🟢 = faster, Red 🔺 = slower.
workflow with no steps
💻 Local Development
WorldFrameworkWorkflow TimeWall TimeOverheadSamplesvs Fastest
🌐 Starter🥇 Next.js (Turbopack)0.038s (+18.1% 🔺)1.014s (~)0.976s101.00x
🌐 RedisNext.js (Turbopack)0.040s (+13.1% 🔺)1.017s (~)0.977s101.05x
💻 LocalNext.js (Turbopack)0.044s (+10.3% 🔺)1.020s (~)0.976s101.16x
💻 LocalExpress0.045s (-6.5% 🟢)1.008s (~)0.963s101.18x
💻 LocalNitro0.046s (+10.5% 🔺)1.006s (~)0.960s101.22x
🌐 MongoDBNext.js (Turbopack)0.094s (-27.0% 🟢)1.018s (~)0.925s102.47x
🌐 TursoNext.js (Turbopack)0.105s (-2.2%)1.014s (~)0.910s102.76x
🐘 PostgresNext.js (Turbopack)0.118s (-2.7%)1.021s (~)0.902s103.13x
🐘 PostgresExpress0.263s (-29.3% 🟢)1.015s (~)0.751s106.95x
🐘 PostgresNitro0.288s (+12.0% 🔺)1.012s (-0.7%)0.724s107.60x
▲ Production (Vercel)
WorldFrameworkWorkflow TimeWall TimeOverheadSamplesvs Fastest
▲ Vercel🥇 Nitro0.558s (-27.3% 🟢)1.649s (-4.3%)1.090s101.00x
▲ VercelNext.js (Turbopack)0.576s (-24.9% 🟢)1.608s (-9.1% 🟢)1.032s101.03x
▲ VercelExpress0.613s (-20.9% 🟢)1.488s (-7.2% 🟢)0.875s101.10x
🔍 Observability: Nitro | Next.js (Turbopack) | Express
workflow with 1 step
💻 Local Development
WorldFrameworkWorkflow TimeWall TimeOverheadSamplesvs Fastest
🌐 Starter🥇 Next.js (Turbopack)1.095s (+2.2%)2.010s (~)0.915s101.00x
💻 LocalNext.js (Turbopack)1.099s (~)2.015s (~)0.916s101.00x
🌐 RedisNext.js (Turbopack)1.099s (+1.3%)2.013s (~)0.914s101.00x
💻 LocalNitro1.111s (~)2.005s (~)0.894s101.01x
💻 LocalExpress1.121s (+0.7%)2.007s (~)0.886s101.02x
🌐 TursoNext.js (Turbopack)1.301s (-0.8%)2.012s (~)0.712s101.19x
🌐 MongoDBNext.js (Turbopack)1.302s (+0.7%)2.014s (~)0.712s101.19x
🐘 PostgresNext.js (Turbopack)1.913s (~)2.018s (~)0.106s101.75x
🐘 PostgresNitro2.150s (-2.7%)3.014s (~)0.864s101.96x
🐘 PostgresExpress2.404s (+9.0% 🔺)3.015s (~)0.611s102.20x
▲ Production (Vercel)
WorldFrameworkWorkflow TimeWall TimeOverheadSamplesvs Fastest
▲ Vercel🥇 Nitro2.756s (-0.7%)3.785s (+3.4%)1.029s101.00x
▲ VercelNext.js (Turbopack)2.863s (+4.1%)3.705s (-2.6%)0.842s101.04x
▲ VercelExpress3.029s (+11.7% 🔺)3.765s (+4.1%)0.737s101.10x
🔍 Observability: Nitro | Next.js (Turbopack) | Express
workflow with 10 sequential steps
💻 Local Development
WorldFrameworkWorkflow TimeWall TimeOverheadSamplesvs Fastest
🌐 Starter🥇 Next.js (Turbopack)10.597s (+1.2%)11.011s (~)0.414s51.00x
🌐 RedisNext.js (Turbopack)10.650s (+0.9%)11.015s (~)0.365s51.01x
💻 LocalNext.js (Turbopack)10.707s (+0.7%)11.018s (~)0.312s51.01x
💻 LocalNitro10.767s (~)11.013s (~)0.245s51.02x
💻 LocalExpress10.823s (~)11.016s (~)0.193s51.02x
🌐 TursoNext.js (Turbopack)12.196s (~)13.027s (~)0.830s51.15x
🌐 MongoDBNext.js (Turbopack)12.230s (~)13.024s (~)0.794s51.15x
🐘 PostgresNext.js (Turbopack)15.435s (+4.5%)16.238s (+3.8%)0.803s51.46x
🐘 PostgresExpress20.229s (-0.6%)21.046s (~)0.817s51.91x
🐘 PostgresNitro20.375s (~)20.841s (-0.9%)0.466s51.92x
▲ Production (Vercel)
WorldFrameworkWorkflow TimeWall TimeOverheadSamplesvs Fastest
▲ Vercel🥇 Next.js (Turbopack)24.300s (+8.1% 🔺)25.264s (+9.1% 🔺)0.964s51.00x
▲ VercelExpress24.381s (+6.0% 🔺)25.047s (+6.0% 🔺)0.665s51.00x
▲ VercelNitro25.309s (+15.5% 🔺)26.132s (+14.2% 🔺)0.822s51.04x
🔍 Observability: Next.js (Turbopack) | Express | Nitro
Promise.all with 10 concurrent steps
💻 Local Development
WorldFrameworkWorkflow TimeWall TimeOverheadSamplesvs Fastest
🌐 Starter🥇 Next.js (Turbopack)1.352s (+3.6%)2.008s (~)0.656s151.00x
🌐 RedisNext.js (Turbopack)1.352s (+2.4%)2.010s (~)0.657s151.00x
💻 LocalNitro1.397s (-0.8%)2.004s (~)0.607s151.03x
💻 LocalNext.js (Turbopack)1.417s (+2.9%)2.012s (~)0.595s151.05x
💻 LocalExpress1.432s (+2.1%)2.007s (~)0.575s151.06x
🐘 PostgresNext.js (Turbopack)1.896s (+13.2% 🔺)2.039s (+1.3%)0.143s151.40x
🌐 MongoDBNext.js (Turbopack)2.134s (~)3.013s (~)0.879s101.58x
🌐 TursoNext.js (Turbopack)2.217s (~)3.013s (~)0.796s101.64x
🐘 PostgresNitro2.376s (-2.3%)3.011s (~)0.635s101.76x
🐘 PostgresExpress2.571s (+5.6% 🔺)3.013s (~)0.442s101.90x
▲ Production (Vercel)
WorldFrameworkWorkflow TimeWall TimeOverheadSamplesvs Fastest
▲ Vercel🥇 Next.js (Turbopack)2.948s (-2.0%)3.782s (-2.4%)0.834s81.00x
▲ VercelExpress3.023s (+4.1%)3.784s (+2.6%)0.761s91.03x
▲ VercelNitro3.190s (+6.6% 🔺)4.888s (+29.2% 🔺)1.698s71.08x
🔍 Observability: Next.js (Turbopack) | Express | Nitro
Promise.all with 25 concurrent steps
💻 Local Development
WorldFrameworkWorkflow TimeWall TimeOverheadSamplesvs Fastest
💻 Local🥇 Next.js (Turbopack)2.087s (-1.7%)2.924s (-1.3%)0.838s111.00x
💻 LocalNitro2.183s (-1.9%)3.148s (-0.7%)0.965s101.05x
💻 LocalExpress2.305s (+3.8%)3.258s (+3.1%)0.953s101.10x
🌐 RedisNext.js (Turbopack)2.481s (+6.0% 🔺)3.013s (~)0.532s101.19x
🌐 StarterNext.js (Turbopack)2.495s (+5.0% 🔺)3.010s (~)0.515s101.20x
🐘 PostgresNext.js (Turbopack)2.729s (+6.3% 🔺)3.017s (~)0.288s101.31x
🐘 PostgresNitro2.782s (-8.7% 🟢)3.021s (-20.1% 🟢)0.239s101.33x
🐘 PostgresExpress2.930s (+3.8%)3.015s (~)0.085s101.40x
🌐 TursoNext.js (Turbopack)4.654s (-0.8%)5.179s (~)0.524s62.23x
🌐 MongoDBNext.js (Turbopack)4.659s (+1.0%)5.187s (~)0.528s62.23x
▲ Production (Vercel)
WorldFrameworkWorkflow TimeWall TimeOverheadSamplesvs Fastest
▲ Vercel🥇 Next.js (Turbopack)4.054s (+19.6% 🔺)4.907s (+22.2% 🔺)0.853s71.00x
▲ VercelNitro4.142s (+11.8% 🔺)5.039s (+16.1% 🔺)0.898s61.02x
▲ VercelExpress4.578s (+43.4% 🔺)5.341s (+48.4% 🔺)0.763s61.13x
🔍 Observability: Next.js (Turbopack) | Nitro | Express
Promise.race with 10 concurrent steps
💻 Local Development
WorldFrameworkWorkflow TimeWall TimeOverheadSamplesvs Fastest
🌐 Redis🥇 Next.js (Turbopack)1.357s (+2.9%)2.010s (~)0.653s151.00x
🌐 StarterNext.js (Turbopack)1.364s (+3.7%)2.007s (~)0.643s151.01x
💻 LocalNext.js (Turbopack)1.413s (~)2.014s (~)0.601s151.04x
💻 LocalNitro1.418s (~)2.005s (~)0.586s151.05x
💻 LocalExpress1.449s (+1.9%)2.006s (~)0.558s151.07x
🐘 PostgresNext.js (Turbopack)1.511s (-13.9% 🟢)2.012s (~)0.501s151.11x
🐘 PostgresExpress1.656s (-15.6% 🟢)2.080s (-6.8% 🟢)0.424s151.22x
🐘 PostgresNitro1.901s (+7.3% 🔺)2.157s (+7.3% 🔺)0.257s141.40x
🌐 MongoDBNext.js (Turbopack)2.158s (~)3.014s (~)0.856s101.59x
🌐 TursoNext.js (Turbopack)2.208s (-0.5%)3.010s (~)0.802s101.63x
▲ Production (Vercel)
WorldFrameworkWorkflow TimeWall TimeOverheadSamplesvs Fastest
▲ Vercel🥇 Nitro2.813s (+0.9%)3.835s (+2.9%)1.022s81.00x
▲ VercelExpress2.979s (-5.2% 🟢)3.725s (-4.1%)0.746s91.06x
▲ VercelNext.js (Turbopack)2.987s (+6.2% 🔺)3.907s (+2.1%)0.920s81.06x
🔍 Observability: Nitro | Express | Next.js (Turbopack)
Promise.race with 25 concurrent steps
💻 Local Development
WorldFrameworkWorkflow TimeWall TimeOverheadSamplesvs Fastest
💻 Local🥇 Next.js (Turbopack)2.305s (+7.1% 🔺)3.261s (+7.0% 🔺)0.956s101.00x
💻 LocalNitro2.311s (+4.8%)3.219s (+1.9%)0.909s101.00x
💻 LocalExpress2.478s (+9.6% 🔺)3.304s (+2.4%)0.827s101.07x
🌐 StarterNext.js (Turbopack)2.484s (+4.7%)3.009s (~)0.525s101.08x
🌐 RedisNext.js (Turbopack)2.489s (+5.4% 🔺)3.044s (+1.1%)0.555s101.08x
🐘 PostgresNext.js (Turbopack)2.578s (~)3.027s (~)0.449s101.12x
🐘 PostgresNitro2.638s (-7.6% 🟢)3.011s (-3.7%)0.373s101.14x
🐘 PostgresExpress2.871s (+5.1% 🔺)3.123s (+3.5%)0.252s101.25x
🌐 MongoDBNext.js (Turbopack)4.674s (+0.7%)5.180s (~)0.506s62.03x
🌐 TursoNext.js (Turbopack)4.716s (+2.0%)5.181s (~)0.465s62.05x
▲ Production (Vercel)
WorldFrameworkWorkflow TimeWall TimeOverheadSamplesvs Fastest
▲ Vercel🥇 Express4.479s (+32.0% 🔺)4.954s (+20.1% 🔺)0.475s71.00x
▲ VercelNext.js (Turbopack)4.515s (+43.2% 🔺)5.114s (+30.5% 🔺)0.599s61.01x
▲ VercelNitro4.876s (+53.7% 🔺)5.665s (+47.8% 🔺)0.789s61.09x
🔍 Observability: Express | Next.js (Turbopack) | Nitro
Stream Benchmarks(includes TTFB metrics)
workflow with stream
💻 Local Development
WorldFrameworkWorkflow TimeTTFBSlurpWall TimeOverheadSamplesvs Fastest
🌐 Starter🥇 Next.js (Turbopack)0.133s (+42.0% 🔺)1.006s (~)0.000s (+100.0% 🔺)1.013s (~)0.881s101.00x
🌐 RedisNext.js (Turbopack)0.139s (+19.9% 🔺)1.004s (~)0.000s (+Infinity% 🔺)1.013s (~)0.874s101.05x
💻 LocalNext.js (Turbopack)0.146s (+5.5% 🔺)1.003s (~)0.020s (+22.4% 🔺)1.031s (~)0.885s101.10x
💻 LocalNitro0.170s (-4.0%)0.992s (~)0.016s (+5.4% 🔺)1.021s (~)0.851s101.28x
💻 LocalExpress0.185s (+6.6% 🔺)0.992s (~)0.018s (+12.0% 🔺)1.026s (~)0.840s101.40x
🌐 TursoNext.js (Turbopack)0.456s (-8.1% 🟢)0.997s (+4.9%)0.000s (+Infinity% 🔺)1.014s (~)0.558s103.44x
🌐 MongoDBNext.js (Turbopack)0.508s (-2.4%)0.941s (+1.7%)0.000s (NaN%)1.013s (~)0.505s103.83x
🐘 PostgresNext.js (Turbopack)1.273s (+46.9% 🔺)1.904s (+69.0% 🔺)0.000s (~)2.019s (+52.9% 🔺)0.746s109.60x
🐘 PostgresNitro2.280s (+3.7%)2.756s (-3.1%)0.000s (-100.0% 🟢)3.014s (~)0.734s1017.20x
🐘 PostgresExpress2.436s (+3.0%)2.610s (-2.6%)0.000s (+Infinity% 🔺)3.017s (~)0.581s1018.37x
▲ Production (Vercel)
WorldFrameworkWorkflow TimeTTFBSlurpWall TimeOverheadSamplesvs Fastest
▲ Vercel🥇 Next.js (Turbopack)2.857s (-5.4% 🟢)3.269s (-3.8%)0.961s (+58.8% 🔺)4.710s (+4.4%)1.853s101.00x
▲ VercelNitro2.863s (-4.9%)3.263s (-2.6%)0.418s (-12.0% 🟢)4.190s (-2.4%)1.327s101.00x
▲ VercelExpress2.893s (-7.1% 🟢)3.270s (-3.7%)0.425s (-15.1% 🟢)4.164s (-7.2% 🟢)1.271s101.01x
🔍 Observability: Next.js (Turbopack) | Nitro | Express
Summary
Fastest Framework by World
Winner determined by most benchmark wins
World🥇 Fastest FrameworkWins
💻 LocalNext.js (Turbopack)7/8
🐘 PostgresNext.js (Turbopack)8/8
▲ VercelNext.js (Turbopack)4/8
Fastest World by Framework
Winner determined by most benchmark wins
Framework🥇 Fastest WorldWins
Express💻 Local8/8
Next.js (Turbopack)🌐 Starter5/8
Nitro💻 Local8/8
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
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Signed-off-by: Peter Wielander <mittgfu@gmail.com>
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should this use the experimental_ convention from AI sdk? I'm just worried about the API diverge between us and AI sdk but maybe I shouldn't be?
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I'm just worried about the API diverge between us and AI sdk but maybe I shouldn't be?
@pranaygp Since we're only adding optional properties to existing interfaces, I'm less worried, since the property simply doesn't exist in AI SDK, and this is specifically only relevant for DurableAgent (since AI SDK has .toUIMessageStream({onFinish: (messages) => >...}) which DurableAgent hides
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Merging since it was in review for two days
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[ai] Add collectUIMessages option to accumulate and return UIMessage[…
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…] from agent.stream (#768)
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, 'i');
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[ai] Add collectUIMessages option to accumulate and return UIMessage[] from agent.stream - #768
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[ai] Add collectUIMessages option to accumulate and return UIMessage[] from agent.stream#768
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Related to #688 and #739
This adds a new option collectUIMessages to agent.stream, which, if passed, adds a stream transformation for accumulating stream chunks in durable state, and will return uiMessages: UIMessage[] from the agent.stream call.
Screenshot 2026-01-12 at 4 41 13 PM
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Signed-off-by: Peter Wielander <mittgfu@gmail.com>
@VaguelySerious
[ai] Add collectUIMessages option to accumulate and return UIMessag…
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…e[] from agent.stream
Signed-off-by: Peter Wielander <mittgfu@gmail.com>
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🦋 Changeset detected
Latest commit: 564c895
The changes in this PR will be included in the next version bump.
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The latest updates on your projects. Learn more about Vercel for GitHub.
ProjectDeploymentReviewUpdated (UTC)
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🧪 E2E Test Results
❌ Some tests failed
Summary
PassedFailedSkippedTotal
✅ ▲ Vercel Production363011374
✅ 💻 Local Development33208340
✅ 📦 Local Production33208340
✅ 🐘 Local Postgres33208340
✅ 🪟 Windows340034
❌ 🌍 Community Worlds131170148
Total152417351576
❌ Failed Tests
🌍 Community Worlds (17 failed)
mongodb (1 failed):
  • webhookWorkflow
redis (1 failed):
  • webhookWorkflow
starter (14 failed):
  • addTenWorkflow
  • addTenWorkflow
  • error handling error propagation workflow errors nested function calls preserve message and stack trace
  • error handling error propagation workflow errors cross-file imports preserve message and stack trace
  • error handling error propagation step errors basic step error preserves message and stack trace
  • error handling error propagation step errors cross-file step error preserves message and function names in stack
  • error handling retry behavior regular Error retries until success
  • error handling retry behavior FatalError fails immediately without retries
  • error handling catchability FatalError can be caught and detected with FatalError.is()
  • 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
  • pathsAliasWorkflow - TypeScript path aliases resolve correctly
turso (1 failed):
  • webhookWorkflow
Details by Category
✅ ▲ Vercel Production
AppPassedFailedSkipped
✅ astro3301
✅ example3301
✅ express3301
✅ fastify3301
✅ hono3301
✅ nextjs-turbopack3301
✅ nextjs-webpack3301
✅ nitro3301
✅ nuxt3301
✅ sveltekit3301
✅ vite3301
✅ 💻 Local Development
AppPassedFailedSkipped
✅ astro-stable3301
✅ express-stable3301
✅ fastify-stable3301
✅ hono-stable3301
✅ nextjs-turbopack-stable3400
✅ nextjs-webpack-stable3400
✅ nitro-stable3301
✅ nuxt-stable3301
✅ sveltekit-stable3301
✅ vite-stable3301
✅ 📦 Local Production
AppPassedFailedSkipped
✅ astro-stable3301
✅ express-stable3301
✅ fastify-stable3301
✅ hono-stable3301
✅ nextjs-turbopack-stable3400
✅ nextjs-webpack-stable3400
✅ nitro-stable3301
✅ nuxt-stable3301
✅ sveltekit-stable3301
✅ vite-stable3301
✅ 🐘 Local Postgres
AppPassedFailedSkipped
✅ astro-stable3301
✅ express-stable3301
✅ fastify-stable3301
✅ hono-stable3301
✅ nextjs-turbopack-stable3400
✅ nextjs-webpack-stable3400
✅ nitro-stable3301
✅ nuxt-stable3301
✅ sveltekit-stable3301
✅ vite-stable3301
✅ 🪟 Windows
AppPassedFailedSkipped
✅ nextjs-turbopack3400
❌ 🌍 Community Worlds
AppPassedFailedSkipped
✅ mongodb-dev300
❌ mongodb3310
✅ redis-dev300
❌ redis3310
✅ starter-dev300
❌ starter20140
✅ turso-dev300
❌ turso3310
📋 View full workflow run
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📊 Benchmark Results
📈 Comparing against baseline from main branch. Green 🟢 = faster, Red 🔺 = slower.
workflow with no steps
💻 Local Development
WorldFrameworkWorkflow TimeWall TimeOverheadSamplesvs Fastest
🌐 Starter🥇 Next.js (Turbopack)0.038s (+18.1% 🔺)1.014s (~)0.976s101.00x
🌐 RedisNext.js (Turbopack)0.040s (+13.1% 🔺)1.017s (~)0.977s101.05x
💻 LocalNext.js (Turbopack)0.044s (+10.3% 🔺)1.020s (~)0.976s101.16x
💻 LocalExpress0.045s (-6.5% 🟢)1.008s (~)0.963s101.18x
💻 LocalNitro0.046s (+10.5% 🔺)1.006s (~)0.960s101.22x
🌐 MongoDBNext.js (Turbopack)0.094s (-27.0% 🟢)1.018s (~)0.925s102.47x
🌐 TursoNext.js (Turbopack)0.105s (-2.2%)1.014s (~)0.910s102.76x
🐘 PostgresNext.js (Turbopack)0.118s (-2.7%)1.021s (~)0.902s103.13x
🐘 PostgresExpress0.263s (-29.3% 🟢)1.015s (~)0.751s106.95x
🐘 PostgresNitro0.288s (+12.0% 🔺)1.012s (-0.7%)0.724s107.60x
▲ Production (Vercel)
WorldFrameworkWorkflow TimeWall TimeOverheadSamplesvs Fastest
▲ Vercel🥇 Nitro0.558s (-27.3% 🟢)1.649s (-4.3%)1.090s101.00x
▲ VercelNext.js (Turbopack)0.576s (-24.9% 🟢)1.608s (-9.1% 🟢)1.032s101.03x
▲ VercelExpress0.613s (-20.9% 🟢)1.488s (-7.2% 🟢)0.875s101.10x
🔍 Observability: Nitro | Next.js (Turbopack) | Express
workflow with 1 step
💻 Local Development
WorldFrameworkWorkflow TimeWall TimeOverheadSamplesvs Fastest
🌐 Starter🥇 Next.js (Turbopack)1.095s (+2.2%)2.010s (~)0.915s101.00x
💻 LocalNext.js (Turbopack)1.099s (~)2.015s (~)0.916s101.00x
🌐 RedisNext.js (Turbopack)1.099s (+1.3%)2.013s (~)0.914s101.00x
💻 LocalNitro1.111s (~)2.005s (~)0.894s101.01x
💻 LocalExpress1.121s (+0.7%)2.007s (~)0.886s101.02x
🌐 TursoNext.js (Turbopack)1.301s (-0.8%)2.012s (~)0.712s101.19x
🌐 MongoDBNext.js (Turbopack)1.302s (+0.7%)2.014s (~)0.712s101.19x
🐘 PostgresNext.js (Turbopack)1.913s (~)2.018s (~)0.106s101.75x
🐘 PostgresNitro2.150s (-2.7%)3.014s (~)0.864s101.96x
🐘 PostgresExpress2.404s (+9.0% 🔺)3.015s (~)0.611s102.20x
▲ Production (Vercel)
WorldFrameworkWorkflow TimeWall TimeOverheadSamplesvs Fastest
▲ Vercel🥇 Nitro2.756s (-0.7%)3.785s (+3.4%)1.029s101.00x
▲ VercelNext.js (Turbopack)2.863s (+4.1%)3.705s (-2.6%)0.842s101.04x
▲ VercelExpress3.029s (+11.7% 🔺)3.765s (+4.1%)0.737s101.10x
🔍 Observability: Nitro | Next.js (Turbopack) | Express
workflow with 10 sequential steps
💻 Local Development
WorldFrameworkWorkflow TimeWall TimeOverheadSamplesvs Fastest
🌐 Starter🥇 Next.js (Turbopack)10.597s (+1.2%)11.011s (~)0.414s51.00x
🌐 RedisNext.js (Turbopack)10.650s (+0.9%)11.015s (~)0.365s51.01x
💻 LocalNext.js (Turbopack)10.707s (+0.7%)11.018s (~)0.312s51.01x
💻 LocalNitro10.767s (~)11.013s (~)0.245s51.02x
💻 LocalExpress10.823s (~)11.016s (~)0.193s51.02x
🌐 TursoNext.js (Turbopack)12.196s (~)13.027s (~)0.830s51.15x
🌐 MongoDBNext.js (Turbopack)12.230s (~)13.024s (~)0.794s51.15x
🐘 PostgresNext.js (Turbopack)15.435s (+4.5%)16.238s (+3.8%)0.803s51.46x
🐘 PostgresExpress20.229s (-0.6%)21.046s (~)0.817s51.91x
🐘 PostgresNitro20.375s (~)20.841s (-0.9%)0.466s51.92x
▲ Production (Vercel)
WorldFrameworkWorkflow TimeWall TimeOverheadSamplesvs Fastest
▲ Vercel🥇 Next.js (Turbopack)24.300s (+8.1% 🔺)25.264s (+9.1% 🔺)0.964s51.00x
▲ VercelExpress24.381s (+6.0% 🔺)25.047s (+6.0% 🔺)0.665s51.00x
▲ VercelNitro25.309s (+15.5% 🔺)26.132s (+14.2% 🔺)0.822s51.04x
🔍 Observability: Next.js (Turbopack) | Express | Nitro
Promise.all with 10 concurrent steps
💻 Local Development
WorldFrameworkWorkflow TimeWall TimeOverheadSamplesvs Fastest
🌐 Starter🥇 Next.js (Turbopack)1.352s (+3.6%)2.008s (~)0.656s151.00x
🌐 RedisNext.js (Turbopack)1.352s (+2.4%)2.010s (~)0.657s151.00x
💻 LocalNitro1.397s (-0.8%)2.004s (~)0.607s151.03x
💻 LocalNext.js (Turbopack)1.417s (+2.9%)2.012s (~)0.595s151.05x
💻 LocalExpress1.432s (+2.1%)2.007s (~)0.575s151.06x
🐘 PostgresNext.js (Turbopack)1.896s (+13.2% 🔺)2.039s (+1.3%)0.143s151.40x
🌐 MongoDBNext.js (Turbopack)2.134s (~)3.013s (~)0.879s101.58x
🌐 TursoNext.js (Turbopack)2.217s (~)3.013s (~)0.796s101.64x
🐘 PostgresNitro2.376s (-2.3%)3.011s (~)0.635s101.76x
🐘 PostgresExpress2.571s (+5.6% 🔺)3.013s (~)0.442s101.90x
▲ Production (Vercel)
WorldFrameworkWorkflow TimeWall TimeOverheadSamplesvs Fastest
▲ Vercel🥇 Next.js (Turbopack)2.948s (-2.0%)3.782s (-2.4%)0.834s81.00x
▲ VercelExpress3.023s (+4.1%)3.784s (+2.6%)0.761s91.03x
▲ VercelNitro3.190s (+6.6% 🔺)4.888s (+29.2% 🔺)1.698s71.08x
🔍 Observability: Next.js (Turbopack) | Express | Nitro
Promise.all with 25 concurrent steps
💻 Local Development
WorldFrameworkWorkflow TimeWall TimeOverheadSamplesvs Fastest
💻 Local🥇 Next.js (Turbopack)2.087s (-1.7%)2.924s (-1.3%)0.838s111.00x
💻 LocalNitro2.183s (-1.9%)3.148s (-0.7%)0.965s101.05x
💻 LocalExpress2.305s (+3.8%)3.258s (+3.1%)0.953s101.10x
🌐 RedisNext.js (Turbopack)2.481s (+6.0% 🔺)3.013s (~)0.532s101.19x
🌐 StarterNext.js (Turbopack)2.495s (+5.0% 🔺)3.010s (~)0.515s101.20x
🐘 PostgresNext.js (Turbopack)2.729s (+6.3% 🔺)3.017s (~)0.288s101.31x
🐘 PostgresNitro2.782s (-8.7% 🟢)3.021s (-20.1% 🟢)0.239s101.33x
🐘 PostgresExpress2.930s (+3.8%)3.015s (~)0.085s101.40x
🌐 TursoNext.js (Turbopack)4.654s (-0.8%)5.179s (~)0.524s62.23x
🌐 MongoDBNext.js (Turbopack)4.659s (+1.0%)5.187s (~)0.528s62.23x
▲ Production (Vercel)
WorldFrameworkWorkflow TimeWall TimeOverheadSamplesvs Fastest
▲ Vercel🥇 Next.js (Turbopack)4.054s (+19.6% 🔺)4.907s (+22.2% 🔺)0.853s71.00x
▲ VercelNitro4.142s (+11.8% 🔺)5.039s (+16.1% 🔺)0.898s61.02x
▲ VercelExpress4.578s (+43.4% 🔺)5.341s (+48.4% 🔺)0.763s61.13x
🔍 Observability: Next.js (Turbopack) | Nitro | Express
Promise.race with 10 concurrent steps
💻 Local Development
WorldFrameworkWorkflow TimeWall TimeOverheadSamplesvs Fastest
🌐 Redis🥇 Next.js (Turbopack)1.357s (+2.9%)2.010s (~)0.653s151.00x
🌐 StarterNext.js (Turbopack)1.364s (+3.7%)2.007s (~)0.643s151.01x
💻 LocalNext.js (Turbopack)1.413s (~)2.014s (~)0.601s151.04x
💻 LocalNitro1.418s (~)2.005s (~)0.586s151.05x
💻 LocalExpress1.449s (+1.9%)2.006s (~)0.558s151.07x
🐘 PostgresNext.js (Turbopack)1.511s (-13.9% 🟢)2.012s (~)0.501s151.11x
🐘 PostgresExpress1.656s (-15.6% 🟢)2.080s (-6.8% 🟢)0.424s151.22x
🐘 PostgresNitro1.901s (+7.3% 🔺)2.157s (+7.3% 🔺)0.257s141.40x
🌐 MongoDBNext.js (Turbopack)2.158s (~)3.014s (~)0.856s101.59x
🌐 TursoNext.js (Turbopack)2.208s (-0.5%)3.010s (~)0.802s101.63x
▲ Production (Vercel)
WorldFrameworkWorkflow TimeWall TimeOverheadSamplesvs Fastest
▲ Vercel🥇 Nitro2.813s (+0.9%)3.835s (+2.9%)1.022s81.00x
▲ VercelExpress2.979s (-5.2% 🟢)3.725s (-4.1%)0.746s91.06x
▲ VercelNext.js (Turbopack)2.987s (+6.2% 🔺)3.907s (+2.1%)0.920s81.06x
🔍 Observability: Nitro | Express | Next.js (Turbopack)
Promise.race with 25 concurrent steps
💻 Local Development
WorldFrameworkWorkflow TimeWall TimeOverheadSamplesvs Fastest
💻 Local🥇 Next.js (Turbopack)2.305s (+7.1% 🔺)3.261s (+7.0% 🔺)0.956s101.00x
💻 LocalNitro2.311s (+4.8%)3.219s (+1.9%)0.909s101.00x
💻 LocalExpress2.478s (+9.6% 🔺)3.304s (+2.4%)0.827s101.07x
🌐 StarterNext.js (Turbopack)2.484s (+4.7%)3.009s (~)0.525s101.08x
🌐 RedisNext.js (Turbopack)2.489s (+5.4% 🔺)3.044s (+1.1%)0.555s101.08x
🐘 PostgresNext.js (Turbopack)2.578s (~)3.027s (~)0.449s101.12x
🐘 PostgresNitro2.638s (-7.6% 🟢)3.011s (-3.7%)0.373s101.14x
🐘 PostgresExpress2.871s (+5.1% 🔺)3.123s (+3.5%)0.252s101.25x
🌐 MongoDBNext.js (Turbopack)4.674s (+0.7%)5.180s (~)0.506s62.03x
🌐 TursoNext.js (Turbopack)4.716s (+2.0%)5.181s (~)0.465s62.05x
▲ Production (Vercel)
WorldFrameworkWorkflow TimeWall TimeOverheadSamplesvs Fastest
▲ Vercel🥇 Express4.479s (+32.0% 🔺)4.954s (+20.1% 🔺)0.475s71.00x
▲ VercelNext.js (Turbopack)4.515s (+43.2% 🔺)5.114s (+30.5% 🔺)0.599s61.01x
▲ VercelNitro4.876s (+53.7% 🔺)5.665s (+47.8% 🔺)0.789s61.09x
🔍 Observability: Express | Next.js (Turbopack) | Nitro
Stream Benchmarks(includes TTFB metrics)
workflow with stream
💻 Local Development
WorldFrameworkWorkflow TimeTTFBSlurpWall TimeOverheadSamplesvs Fastest
🌐 Starter🥇 Next.js (Turbopack)0.133s (+42.0% 🔺)1.006s (~)0.000s (+100.0% 🔺)1.013s (~)0.881s101.00x
🌐 RedisNext.js (Turbopack)0.139s (+19.9% 🔺)1.004s (~)0.000s (+Infinity% 🔺)1.013s (~)0.874s101.05x
💻 LocalNext.js (Turbopack)0.146s (+5.5% 🔺)1.003s (~)0.020s (+22.4% 🔺)1.031s (~)0.885s101.10x
💻 LocalNitro0.170s (-4.0%)0.992s (~)0.016s (+5.4% 🔺)1.021s (~)0.851s101.28x
💻 LocalExpress0.185s (+6.6% 🔺)0.992s (~)0.018s (+12.0% 🔺)1.026s (~)0.840s101.40x
🌐 TursoNext.js (Turbopack)0.456s (-8.1% 🟢)0.997s (+4.9%)0.000s (+Infinity% 🔺)1.014s (~)0.558s103.44x
🌐 MongoDBNext.js (Turbopack)0.508s (-2.4%)0.941s (+1.7%)0.000s (NaN%)1.013s (~)0.505s103.83x
🐘 PostgresNext.js (Turbopack)1.273s (+46.9% 🔺)1.904s (+69.0% 🔺)0.000s (~)2.019s (+52.9% 🔺)0.746s109.60x
🐘 PostgresNitro2.280s (+3.7%)2.756s (-3.1%)0.000s (-100.0% 🟢)3.014s (~)0.734s1017.20x
🐘 PostgresExpress2.436s (+3.0%)2.610s (-2.6%)0.000s (+Infinity% 🔺)3.017s (~)0.581s1018.37x
▲ Production (Vercel)
WorldFrameworkWorkflow TimeTTFBSlurpWall TimeOverheadSamplesvs Fastest
▲ Vercel🥇 Next.js (Turbopack)2.857s (-5.4% 🟢)3.269s (-3.8%)0.961s (+58.8% 🔺)4.710s (+4.4%)1.853s101.00x
▲ VercelNitro2.863s (-4.9%)3.263s (-2.6%)0.418s (-12.0% 🟢)4.190s (-2.4%)1.327s101.00x
▲ VercelExpress2.893s (-7.1% 🟢)3.270s (-3.7%)0.425s (-15.1% 🟢)4.164s (-7.2% 🟢)1.271s101.01x
🔍 Observability: Next.js (Turbopack) | Nitro | Express
Summary
Fastest Framework by World
Winner determined by most benchmark wins
World🥇 Fastest FrameworkWins
💻 LocalNext.js (Turbopack)7/8
🐘 PostgresNext.js (Turbopack)8/8
▲ VercelNext.js (Turbopack)4/8
Fastest World by Framework
Winner determined by most benchmark wins
Framework🥇 Fastest WorldWins
Express💻 Local8/8
Next.js (Turbopack)🌐 Starter5/8
Nitro💻 Local8/8
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
@VaguelySerious
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Signed-off-by: Peter Wielander <mittgfu@gmail.com>
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@pranaygp
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should this use the experimental_ convention from AI sdk? I'm just worried about the API diverge between us and AI sdk but maybe I shouldn't be?
@VaguelySerious
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I'm just worried about the API diverge between us and AI sdk but maybe I shouldn't be?
@pranaygp Since we're only adding optional properties to existing interfaces, I'm less worried, since the property simply doesn't exist in AI SDK, and this is specifically only relevant for DurableAgent (since AI SDK has .toUIMessageStream({onFinish: (messages) => >...}) which DurableAgent hides
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Jan 14, 2026

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Merging since it was in review for two days
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[ai] Add collectUIMessages option to accumulate and return UIMessage[…
e336fc4
…] from agent.stream (#768)
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