[workbench] Add TanStack Start workbench by VaguelySerious · Pull Request #1875 · vercel/workflow

VaguelySerious · 2026-04-30T02:14:40Z

Summary

Adds a TanStack Start workbench app under workbench/tanstack-start/. TanStack Start runs on Vite + Nitro, so the existing workflow/vite plugin already supports it — no SDK changes are needed.
Wires the new app into the local-build, dev, local-prod, local-postgres, and Vercel-prod e2e matrices with the same shape as the other vite/nitro apps.
Adds a getting-started/tanstack-start guide and removes the "coming soon" badge from the home-page framework grid.

Derived from first principles, but cross-checked against #877 for project ID and route names so the existing Vercel project (prj_643jeVugTMq5ivsOFQHcbLG1qcnu) can be reused.

Notable choices

Workbench app is intentionally minimal — just /, /api/chat (HMR sentinel), and /api/test-direct-step-call. Symlinks workflows/ and plugins/ from workbench/nitro-v3/ so we don't fork the test suite.
routeTree.gen.ts is gitignored and added to biome's exclusion list — TanStack regenerates it on vite dev/vite build.
Both src/routes/api/* files avoid statically importing workflow source. TanStack Start bundles all src/routes/** files together; statically importing a workflow file pulls its class definitions into the route chunk, where the SWC plugin re-emits class-registration IIFEs under the app's host. Combined with the canonical registrations under the source-file host, the second Object.defineProperty(cls, "classId", { configurable: false }) then throws at module-load time. Using a dynamic import for the HMR sentinel and an inline step for the direct-step-call test avoids this pathway.
Docs page is forked from getting-started/vite.mdx (same Vite plugin under the hood).

Test plan

Validated locally against the workbench's prod build (pnpm build && node .output/server/index.mjs) with both world backends, mirroring CI:

pnpm turbo run build --filter='!./workbench/*' (packages + docs)
cd workbench/tanstack-start && pnpm build (prod build)
APP_NAME=tanstack-start pnpm vitest run packages/core/e2e/local-build.test.ts — 13/13 pass
APP_NAME=tanstack-start DEV_TEST_CONFIG=... pnpm vitest run packages/core/e2e/dev.test.ts against vite dev — 3/3 pass (3 N/A skipped: Next.js-only)
APP_NAME=tanstack-start ... pnpm vitest run packages/core/e2e/e2e.test.ts against vite dev — 70/70 pass (6 N/A skipped: Pages Router)
Same against prod build with local world — 71/71 pass (6 N/A skipped)
Same against prod build with postgres world (Docker postgres:18-alpine matching CI) — 71/71 pass (6 N/A skipped)

CI status

✅ E2E Local Dev (tanstack-start)
✅ E2E Local Prod (tanstack-start)
✅ E2E Local Postgres (tanstack-start)
❌ E2E Vercel Prod (tanstack-start) — Vercel preview never appears for this branch's SHA. The project ID was carried over from feat: add tanstack support #877's draft; whoever takes this over needs to confirm workbench-tanstack-start-workflow is connected to this repo / has the GitHub deployment hook enabled before un-drafting.
❌ Docs Preview Smoke Checks — same failure happens on other recent PRs and is being fixed in ci: switch Vercel deployment-protection bypass to OIDC Trusted Sources #1882 (migrating from static VERCEL_AUTOMATION_BYPASS_SECRET to OIDC Trusted Sources). Not caused by changes in this PR.
Other failures on this PR (Benchmark Vercel, Community Worlds, nextjs Vercel deployments) are pre-existing and unrelated.

🤖 Generated with Claude Code

changeset-bot · 2026-04-30T02:14:44Z

🦋 Changeset detected

Latest commit: bdfbb81

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

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vercel · 2026-04-30T02:14:46Z

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

Project	Deployment	Actions	Updated (UTC)
example-nextjs-workflow-turbopack	Ready	Preview, Comment	May 4, 2026 0:19am
example-nextjs-workflow-webpack	Ready	Preview, Comment	May 4, 2026 0:19am
example-workflow	Ready	Preview, Comment	May 4, 2026 0:19am
workbench-astro-workflow	Ready	Preview, Comment	May 4, 2026 0:19am
workbench-express-workflow	Ready	Preview, Comment	May 4, 2026 0:19am
workbench-fastify-workflow	Ready	Preview, Comment	May 4, 2026 0:19am
workbench-hono-workflow	Ready	Preview, Comment	May 4, 2026 0:19am
workbench-nitro-workflow	Ready	Preview, Comment	May 4, 2026 0:19am
workbench-nuxt-workflow	Ready	Preview, Comment	May 4, 2026 0:19am
workbench-sveltekit-workflow	Ready	Preview, Comment	May 4, 2026 0:19am
workbench-vite-workflow	Ready	Preview, Comment	May 4, 2026 0:19am
workflow-docs	Ready	Preview, Comment, Open in v0	May 4, 2026 0:19am
workflow-swc-playground	Ready	Preview, Comment	May 4, 2026 0:19am
workflow-web	Ready	Preview, Comment	May 4, 2026 0:19am

github-actions · 2026-04-30T02:14:48Z

📊 Benchmark Results

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

workflow with no steps

💻 Local Development

World	Framework	Workflow Time	Wall Time	Overhead	Samples	vs Fastest
💻 Local	🥇 Express	0.034s (-22.6% 🟢)	1.004s (~)	0.970s	10	1.00x
💻 Local	Nitro	0.041s (-4.9%)	1.006s (~)	0.965s	10	1.20x
🐘 Postgres	Express	0.045s (-21.7% 🟢)	1.008s (~)	0.963s	10	1.32x
💻 Local	Next.js (Turbopack)	0.046s	1.005s	0.959s	10	1.35x
🐘 Postgres	Next.js (Turbopack)	0.056s	1.011s	0.955s	10	1.63x
🐘 Postgres	Nitro	0.058s (-39.0% 🟢)	1.010s (-3.2%)	0.952s	10	1.69x

▲ Production (Vercel)

World	Framework	Workflow Time	Wall Time	Overhead	Samples	vs Fastest
▲ Vercel	🥇 Next.js (Turbopack)	1.210s (+381.2% 🔺)	4.397s (+88.5% 🔺)	3.187s	10	1.00x
▲ Vercel	Express	⚠️missing	-	-	-	-
▲ Vercel	Nitro	⚠️missing	-	-	-	-

🔍 Observability: Next.js (Turbopack)

workflow with 1 step

💻 Local Development

World	Framework	Workflow Time	Wall Time	Overhead	Samples	vs Fastest
💻 Local	🥇 Express	1.102s (-2.0%)	2.005s (~)	0.902s	10	1.00x
🐘 Postgres	Express	1.110s (-3.1%)	2.008s (~)	0.897s	10	1.01x
💻 Local	Next.js (Turbopack)	1.119s	2.006s	0.887s	10	1.01x
💻 Local	Nitro	1.136s (~)	2.006s (~)	0.870s	10	1.03x
🐘 Postgres	Next.js (Turbopack)	1.146s	2.008s	0.862s	10	1.04x
🐘 Postgres	Nitro	1.148s (+0.7%)	2.009s (~)	0.861s	10	1.04x

▲ Production (Vercel)

World	Framework	Workflow Time	Wall Time	Overhead	Samples	vs Fastest
▲ Vercel	🥇 Next.js (Turbopack)	2.969s (+45.9% 🔺)	6.427s (+67.8% 🔺)	3.458s	10	1.00x
▲ Vercel	Express	⚠️missing	-	-	-	-
▲ Vercel	Nitro	⚠️missing	-	-	-	-

🔍 Observability: Next.js (Turbopack)

workflow with 10 sequential steps

💻 Local Development

World	Framework	Workflow Time	Wall Time	Overhead	Samples	vs Fastest
🐘 Postgres	🥇 Express	10.647s (-2.9%)	11.017s (~)	0.370s	3	1.00x
💻 Local	Express	10.748s (-1.6%)	11.020s (~)	0.272s	3	1.01x
💻 Local	Next.js (Turbopack)	10.841s	11.024s	0.183s	3	1.02x
🐘 Postgres	Next.js (Turbopack)	10.906s	11.350s	0.444s	3	1.02x
💻 Local	Nitro	10.938s (~)	11.023s (~)	0.085s	3	1.03x
🐘 Postgres	Nitro	10.973s (+0.9%)	11.356s (+3.0%)	0.383s	3	1.03x

▲ Production (Vercel)

World	Framework	Workflow Time	Wall Time	Overhead	Samples	vs Fastest
▲ Vercel	🥇 Next.js (Turbopack)	17.666s (+2.0%)	23.484s (+21.1% 🔺)	5.818s	2	1.00x
▲ Vercel	Express	⚠️missing	-	-	-	-
▲ Vercel	Nitro	⚠️missing	-	-	-	-

🔍 Observability: Next.js (Turbopack)

workflow with 25 sequential steps

💻 Local Development

World	Framework	Workflow Time	Wall Time	Overhead	Samples	vs Fastest
🐘 Postgres	🥇 Express	13.975s (-4.2%)	14.222s (-5.3% 🟢)	0.247s	5	1.00x
🐘 Postgres	Next.js (Turbopack)	14.426s	15.019s	0.592s	4	1.03x
💻 Local	Express	14.474s (-3.3%)	15.027s (~)	0.554s	4	1.04x
🐘 Postgres	Nitro	14.540s (~)	15.022s (~)	0.482s	4	1.04x
💻 Local	Next.js (Turbopack)	14.700s	15.031s	0.332s	4	1.05x
💻 Local	Nitro	14.987s (~)	15.030s (-6.2% 🟢)	0.043s	4	1.07x

▲ Production (Vercel)

World	Framework	Workflow Time	Wall Time	Overhead	Samples	vs Fastest
▲ Vercel	🥇 Next.js (Turbopack)	37.830s (-28.0% 🟢)	39.739s (-27.2% 🟢)	1.910s	2	1.00x
▲ Vercel	Express	⚠️missing	-	-	-	-
▲ Vercel	Nitro	⚠️missing	-	-	-	-

🔍 Observability: Next.js (Turbopack)

workflow with 50 sequential steps

💻 Local Development

World	Framework	Workflow Time	Wall Time	Overhead	Samples	vs Fastest
🐘 Postgres	🥇 Express	12.857s (-8.2% 🟢)	13.021s (-10.8% 🟢)	0.164s	7	1.00x
🐘 Postgres	Next.js (Turbopack)	13.751s	14.018s	0.267s	7	1.07x
🐘 Postgres	Nitro	14.075s (+0.8%)	14.735s (+3.0%)	0.660s	7	1.09x
💻 Local	Express	15.076s (-9.2% 🟢)	15.693s (-7.9% 🟢)	0.617s	6	1.17x
💻 Local	Next.js (Turbopack)	16.151s	17.031s	0.880s	6	1.26x
💻 Local	Nitro	16.415s (-2.2%)	17.031s (~)	0.617s	6	1.28x

▲ Production (Vercel)

World	Framework	Workflow Time	Wall Time	Overhead	Samples	vs Fastest
▲ Vercel	🥇 Next.js (Turbopack)	60.553s (-84.6% 🟢)	63.398s (-84.0% 🟢)	2.845s	2	1.00x
▲ Vercel	Express	⚠️missing	-	-	-	-
▲ Vercel	Nitro	⚠️missing	-	-	-	-

🔍 Observability: Next.js (Turbopack)

Promise.all with 10 concurrent steps

💻 Local Development

World	Framework	Workflow Time	Wall Time	Overhead	Samples	vs Fastest
🐘 Postgres	🥇 Express	1.188s (-5.7% 🟢)	2.009s (~)	0.821s	15	1.00x
🐘 Postgres	Next.js (Turbopack)	1.239s	2.009s	0.770s	15	1.04x
🐘 Postgres	Nitro	1.258s (-1.3%)	2.010s (~)	0.752s	15	1.06x
💻 Local	Express	1.393s (-6.4% 🟢)	2.005s (~)	0.612s	15	1.17x
💻 Local	Nitro	1.495s (-8.4% 🟢)	2.006s (-3.3%)	0.511s	15	1.26x
💻 Local	Next.js (Turbopack)	1.555s	2.007s	0.451s	15	1.31x

▲ Production (Vercel)

World	Framework	Workflow Time	Wall Time	Overhead	Samples	vs Fastest
▲ Vercel	🥇 Next.js (Turbopack)	2.008s (-40.9% 🟢)	3.747s (-24.0% 🟢)	1.739s	9	1.00x
▲ Vercel	Express	⚠️missing	-	-	-	-
▲ Vercel	Nitro	⚠️missing	-	-	-	-

🔍 Observability: Next.js (Turbopack)

Promise.all with 25 concurrent steps

💻 Local Development

World	Framework	Workflow Time	Wall Time	Overhead	Samples	vs Fastest
🐘 Postgres	🥇 Express	2.262s (-4.2%)	3.009s (~)	0.747s	10	1.00x
💻 Local	Express	2.357s (-20.2% 🟢)	3.006s (-12.9% 🟢)	0.649s	10	1.04x
🐘 Postgres	Next.js (Turbopack)	2.388s	3.010s	0.622s	10	1.06x
🐘 Postgres	Nitro	2.419s (+2.9%)	3.009s (~)	0.591s	10	1.07x
💻 Local	Nitro	2.851s (-9.3% 🟢)	3.110s (-20.0% 🟢)	0.258s	10	1.26x
💻 Local	Next.js (Turbopack)	2.944s	3.676s	0.732s	9	1.30x

▲ Production (Vercel)

World	Framework	Workflow Time	Wall Time	Overhead	Samples	vs Fastest
▲ Vercel	🥇 Next.js (Turbopack)	3.837s (-46.0% 🟢)	8.128s (-8.7% 🟢)	4.290s	4	1.00x
▲ Vercel	Express	⚠️missing	-	-	-	-
▲ Vercel	Nitro	⚠️missing	-	-	-	-

🔍 Observability: Next.js (Turbopack)

Promise.all with 50 concurrent steps

💻 Local Development

World	Framework	Workflow Time	Wall Time	Overhead	Samples	vs Fastest
🐘 Postgres	🥇 Express	3.377s (-3.1%)	4.010s (~)	0.633s	8	1.00x
🐘 Postgres	Nitro	3.476s (~)	4.011s (~)	0.534s	8	1.03x
🐘 Postgres	Next.js (Turbopack)	3.643s	4.011s	0.368s	8	1.08x
💻 Local	Express	6.116s (-26.7% 🟢)	6.817s (-24.5% 🟢)	0.701s	5	1.81x
💻 Local	Nitro	7.329s (-12.2% 🟢)	8.019s (-11.1% 🟢)	0.690s	4	2.17x
💻 Local	Next.js (Turbopack)	8.502s	9.021s	0.519s	4	2.52x

▲ Production (Vercel)

World	Framework	Workflow Time	Wall Time	Overhead	Samples	vs Fastest
▲ Vercel	🥇 Next.js (Turbopack)	4.764s (-46.6% 🟢)	10.121s (-7.7% 🟢)	5.358s	3	1.00x
▲ Vercel	Express	⚠️missing	-	-	-	-
▲ Vercel	Nitro	⚠️missing	-	-	-	-

🔍 Observability: Next.js (Turbopack)

Promise.race with 10 concurrent steps

💻 Local Development

World	Framework	Workflow Time	Wall Time	Overhead	Samples	vs Fastest
🐘 Postgres	🥇 Express	1.199s (-4.6%)	2.008s (~)	0.809s	15	1.00x
🐘 Postgres	Next.js (Turbopack)	1.227s	2.008s	0.781s	15	1.02x
🐘 Postgres	Nitro	1.262s (~)	2.008s (~)	0.746s	15	1.05x
💻 Local	Express	1.417s (-25.2% 🟢)	2.005s (-15.2% 🟢)	0.588s	15	1.18x
💻 Local	Nitro	1.499s (-19.6% 🟢)	2.006s (-14.3% 🟢)	0.507s	15	1.25x
💻 Local	Next.js (Turbopack)	1.512s	2.006s	0.494s	15	1.26x

▲ Production (Vercel)

World	Framework	Workflow Time	Wall Time	Overhead	Samples	vs Fastest
▲ Vercel	🥇 Next.js (Turbopack)	2.028s (-30.8% 🟢)	8.044s (+73.3% 🔺)	6.016s	5	1.00x
▲ Vercel	Express	⚠️missing	-	-	-	-
▲ Vercel	Nitro	⚠️missing	-	-	-	-

🔍 Observability: Next.js (Turbopack)

Promise.race with 25 concurrent steps

💻 Local Development

World	Framework	Workflow Time	Wall Time	Overhead	Samples	vs Fastest
🐘 Postgres	🥇 Express	2.278s (-2.7%)	3.009s (~)	0.731s	10	1.00x
🐘 Postgres	Nitro	2.333s (~)	3.009s (~)	0.676s	10	1.02x
🐘 Postgres	Next.js (Turbopack)	2.451s	3.008s	0.557s	10	1.08x
💻 Local	Express	2.492s (-20.5% 🟢)	3.007s (-20.1% 🟢)	0.515s	10	1.09x
💻 Local	Nitro	2.898s (-5.4% 🟢)	3.342s (-14.0% 🟢)	0.444s	9	1.27x
💻 Local	Next.js (Turbopack)	2.995s	3.565s	0.570s	9	1.31x

▲ Production (Vercel)

World	Framework	Workflow Time	Wall Time	Overhead	Samples	vs Fastest
▲ Vercel	🥇 Next.js (Turbopack)	2.508s (-20.2% 🟢)	5.548s (+22.7% 🔺)	3.039s	6	1.00x
▲ Vercel	Express	⚠️missing	-	-	-	-
▲ Vercel	Nitro	⚠️missing	-	-	-	-

🔍 Observability: Next.js (Turbopack)

Promise.race with 50 concurrent steps

💻 Local Development

World	Framework	Workflow Time	Wall Time	Overhead	Samples	vs Fastest
🐘 Postgres	🥇 Express	3.363s (-3.9%)	4.010s (~)	0.647s	8	1.00x
🐘 Postgres	Nitro	3.453s (-0.8%)	4.009s (~)	0.556s	8	1.03x
🐘 Postgres	Next.js (Turbopack)	3.641s	4.010s	0.369s	8	1.08x
💻 Local	Express	6.670s (-24.2% 🟢)	7.215s (-22.2% 🟢)	0.546s	5	1.98x
💻 Local	Nitro	7.924s (-13.3% 🟢)	8.272s (-17.5% 🟢)	0.348s	4	2.36x
💻 Local	Next.js (Turbopack)	8.246s	8.768s	0.521s	4	2.45x

▲ Production (Vercel)

World	Framework	Workflow Time	Wall Time	Overhead	Samples	vs Fastest
▲ Vercel	🥇 Next.js (Turbopack)	4.759s (-29.6% 🟢)	6.208s (-27.3% 🟢)	1.449s	5	1.00x
▲ Vercel	Express	⚠️missing	-	-	-	-
▲ Vercel	Nitro	⚠️missing	-	-	-	-

🔍 Observability: Next.js (Turbopack)

workflow with 10 sequential data payload steps (10KB)

💻 Local Development

World	Framework	Workflow Time	Wall Time	Overhead	Samples	vs Fastest
🐘 Postgres	🥇 Express	0.597s (-28.8% 🟢)	1.006s (-1.7%)	0.409s	60	1.00x
🐘 Postgres	Next.js (Turbopack)	0.749s	1.006s	0.257s	60	1.25x
💻 Local	Express	0.812s (-17.5% 🟢)	1.004s (-6.7% 🟢)	0.192s	60	1.36x
🐘 Postgres	Nitro	0.826s (+0.6%)	1.023s (+1.7%)	0.197s	59	1.38x
💻 Local	Next.js (Turbopack)	0.858s	1.022s	0.164s	59	1.44x
💻 Local	Nitro	1.014s (+3.4%)	1.627s (+48.8% 🔺)	0.613s	37	1.70x

▲ Production (Vercel)

World	Framework	Workflow Time	Wall Time	Overhead	Samples	vs Fastest
▲ Vercel	🥇 Next.js (Turbopack)	11.062s (-23.7% 🟢)	13.187s (-18.0% 🟢)	2.125s	5	1.00x
▲ Vercel	Express	⚠️missing	-	-	-	-
▲ Vercel	Nitro	⚠️missing	-	-	-	-

🔍 Observability: Next.js (Turbopack)

workflow with 25 sequential data payload steps (10KB)

💻 Local Development

World	Framework	Workflow Time	Wall Time	Overhead	Samples	vs Fastest
🐘 Postgres	🥇 Express	1.432s (-27.6% 🟢)	2.007s (-11.1% 🟢)	0.575s	45	1.00x
🐘 Postgres	Next.js (Turbopack)	1.856s	2.029s	0.173s	45	1.30x
🐘 Postgres	Nitro	1.930s (~)	2.174s (+3.5%)	0.244s	42	1.35x
💻 Local	Express	2.467s (-18.2% 🟢)	3.007s (-16.1% 🟢)	0.540s	30	1.72x
💻 Local	Next.js (Turbopack)	2.747s	3.042s	0.295s	30	1.92x
💻 Local	Nitro	3.019s (-0.5%)	3.649s (-2.9%)	0.630s	25	2.11x

▲ Production (Vercel)

World	Framework	Workflow Time	Wall Time	Overhead	Samples	vs Fastest
▲ Vercel	🥇 Next.js (Turbopack)	30.085s (-39.6% 🟢)	31.809s (-38.5% 🟢)	1.723s	3	1.00x
▲ Vercel	Express	⚠️missing	-	-	-	-
▲ Vercel	Nitro	⚠️missing	-	-	-	-

🔍 Observability: Next.js (Turbopack)

workflow with 50 sequential data payload steps (10KB)

💻 Local Development

World	Framework	Workflow Time	Wall Time	Overhead	Samples	vs Fastest
🐘 Postgres	🥇 Express	2.962s (-25.8% 🟢)	3.193s (-26.9% 🟢)	0.231s	38	1.00x
🐘 Postgres	Next.js (Turbopack)	3.779s	4.008s	0.230s	30	1.28x
🐘 Postgres	Nitro	3.998s (-2.6%)	4.403s (-4.4%)	0.405s	28	1.35x
💻 Local	Express	7.440s (-19.2% 🟢)	8.014s (-20.0% 🟢)	0.574s	15	2.51x
💻 Local	Next.js (Turbopack)	8.807s	9.089s	0.282s	14	2.97x
💻 Local	Nitro	8.931s (-3.9%)	9.325s (-6.9% 🟢)	0.394s	13	3.02x

▲ Production (Vercel)

World	Framework	Workflow Time	Wall Time	Overhead	Samples	vs Fastest
▲ Vercel	🥇 Next.js (Turbopack)	81.626s (-23.8% 🟢)	83.612s (-23.2% 🟢)	1.986s	2	1.00x
▲ Vercel	Express	⚠️missing	-	-	-	-
▲ Vercel	Nitro	⚠️missing	-	-	-	-

🔍 Observability: Next.js (Turbopack)

workflow with 10 concurrent data payload steps (10KB)

💻 Local Development

World	Framework	Workflow Time	Wall Time	Overhead	Samples	vs Fastest
🐘 Postgres	🥇 Express	0.225s (-20.4% 🟢)	1.006s (~)	0.782s	60	1.00x
🐘 Postgres	Next.js (Turbopack)	0.255s	1.007s	0.752s	60	1.13x
🐘 Postgres	Nitro	0.279s (-1.6%)	1.007s (~)	0.728s	60	1.24x
💻 Local	Express	0.475s (-15.3% 🟢)	1.004s (~)	0.529s	60	2.11x
💻 Local	Next.js (Turbopack)	0.550s	1.005s	0.455s	60	2.45x
💻 Local	Nitro	0.578s (-4.5%)	1.004s (-1.7%)	0.427s	60	2.57x

▲ Production (Vercel)

World	Framework	Workflow Time	Wall Time	Overhead	Samples	vs Fastest
▲ Vercel	🥇 Next.js (Turbopack)	1.680s (-16.9% 🟢)	3.653s (-3.7%)	1.972s	17	1.00x
▲ Vercel	Express	⚠️missing	-	-	-	-
▲ Vercel	Nitro	⚠️missing	-	-	-	-

🔍 Observability: Next.js (Turbopack)

workflow with 25 concurrent data payload steps (10KB)

💻 Local Development

World	Framework	Workflow Time	Wall Time	Overhead	Samples	vs Fastest
🐘 Postgres	🥇 Express	0.360s (-29.4% 🟢)	1.005s (~)	0.645s	90	1.00x
🐘 Postgres	Next.js (Turbopack)	0.474s	1.006s	0.532s	90	1.32x
🐘 Postgres	Nitro	0.487s (-1.9%)	1.007s (~)	0.520s	90	1.35x
💻 Local	Express	2.023s (-19.5% 🟢)	2.632s (-12.5% 🟢)	0.608s	35	5.62x
💻 Local	Nitro	2.358s (-7.1% 🟢)	3.008s (~)	0.650s	30	6.55x
💻 Local	Next.js (Turbopack)	2.655s	3.009s	0.354s	30	7.37x

▲ Production (Vercel)

World	Framework	Workflow Time	Wall Time	Overhead	Samples	vs Fastest
▲ Vercel	🥇 Next.js (Turbopack)	3.477s (-1.7%)	5.331s (+2.6%)	1.854s	17	1.00x
▲ Vercel	Express	⚠️missing	-	-	-	-
▲ Vercel	Nitro	⚠️missing	-	-	-	-

🔍 Observability: Next.js (Turbopack)

workflow with 50 concurrent data payload steps (10KB)

💻 Local Development

World	Framework	Workflow Time	Wall Time	Overhead	Samples	vs Fastest
🐘 Postgres	🥇 Express	0.569s (-30.5% 🟢)	1.006s (-1.1%)	0.437s	120	1.00x
🐘 Postgres	Next.js (Turbopack)	0.755s	1.006s	0.251s	120	1.33x
🐘 Postgres	Nitro	0.812s (+2.7%)	1.008s (~)	0.196s	120	1.43x
💻 Local	Express	8.696s (-22.3% 🟢)	9.247s (-22.6% 🟢)	0.552s	14	15.29x
💻 Local	Nitro	10.377s (-7.3% 🟢)	10.936s (-6.2% 🟢)	0.559s	11	18.25x
💻 Local	Next.js (Turbopack)	10.892s	11.485s	0.592s	11	19.15x

▲ Production (Vercel)

World	Framework	Workflow Time	Wall Time	Overhead	Samples	vs Fastest
▲ Vercel	🥇 Next.js (Turbopack)	6.197s (-40.0% 🟢)	8.275s (-32.7% 🟢)	2.078s	15	1.00x
▲ Vercel	Express	⚠️missing	-	-	-	-
▲ Vercel	Nitro	⚠️missing	-	-	-	-

🔍 Observability: Next.js (Turbopack)

Stream Benchmarks(includes TTFB metrics)

workflow with stream

💻 Local Development

World	Framework	Workflow Time	TTFB	Slurp	Wall Time	Overhead	Samples	vs Fastest
🐘 Postgres	🥇 Express	0.151s (-26.3% 🟢)	1.000s (~)	0.001s (-31.3% 🟢)	1.010s (~)	0.859s	10	1.00x
💻 Local	Express	0.166s (-16.7% 🟢)	1.003s (~)	0.008s (-32.2% 🟢)	1.013s (-0.5%)	0.847s	10	1.10x
💻 Local	Next.js (Turbopack)	0.178s	1.004s	0.012s	1.019s	0.841s	10	1.18x
🐘 Postgres	Next.js (Turbopack)	0.186s	1.001s	0.001s	1.009s	0.823s	10	1.23x
💻 Local	Nitro	0.208s (-2.8%)	1.004s (~)	0.010s (-19.2% 🟢)	1.016s (~)	0.808s	10	1.37x
🐘 Postgres	Nitro	0.216s (+5.3% 🔺)	1.000s (~)	0.001s (-26.7% 🟢)	1.009s (~)	0.793s	10	1.43x

▲ Production (Vercel)

World	Framework	Workflow Time	TTFB	Slurp	Wall Time	Overhead	Samples	vs Fastest
▲ Vercel	🥇 Next.js (Turbopack)	1.639s (-76.1% 🟢)	2.913s (-66.3% 🟢)	2.385s (+277.4% 🔺)	5.713s (-41.6% 🟢)	4.074s	10	1.00x
▲ Vercel	Express	⚠️missing	-	-	-	-	-
▲ Vercel	Nitro	⚠️missing	-	-	-	-	-

🔍 Observability: Next.js (Turbopack)

stream pipeline with 5 transform steps (1MB)

💻 Local Development

World	Framework	Workflow Time	TTFB	Slurp	Wall Time	Overhead	Samples	vs Fastest
🐘 Postgres	🥇 Express	0.496s (-21.3% 🟢)	1.005s (~)	0.003s (-12.8% 🟢)	1.019s (~)	0.523s	59	1.00x
🐘 Postgres	Next.js (Turbopack)	0.599s	1.008s	0.003s	1.019s	0.420s	59	1.21x
🐘 Postgres	Nitro	0.631s (+1.0%)	1.003s (~)	0.004s (+3.7%)	1.023s (~)	0.392s	59	1.27x
💻 Local	Express	0.734s (-3.1%)	1.009s (-1.9%)	0.009s (-2.0%)	1.113s (+7.0% 🔺)	0.379s	54	1.48x
💻 Local	Nitro	0.756s (-9.8% 🟢)	1.012s (~)	0.010s (+3.5%)	1.024s (-8.2% 🟢)	0.267s	59	1.52x
💻 Local	Next.js (Turbopack)	0.760s	1.011s	0.011s	1.117s	0.357s	54	1.53x

▲ Production (Vercel)

World	Framework	Workflow Time	TTFB	Slurp	Wall Time	Overhead	Samples	vs Fastest
▲ Vercel	🥇 Next.js (Turbopack)	4.605s (-72.8% 🟢)	5.710s (-68.7% 🟢)	0.405s (+91.6% 🔺)	7.131s (-62.3% 🟢)	2.526s	9	1.00x
▲ Vercel	Express	⚠️missing	-	-	-	-	-
▲ Vercel	Nitro	⚠️missing	-	-	-	-	-

🔍 Observability: Next.js (Turbopack)

10 parallel streams (1MB each)

💻 Local Development

World	Framework	Workflow Time	TTFB	Slurp	Wall Time	Overhead	Samples	vs Fastest
🐘 Postgres	🥇 Express	0.922s (-4.0%)	1.108s (-13.3% 🟢)	0.000s (-58.2% 🟢)	1.116s (-14.6% 🟢)	0.194s	55	1.00x
🐘 Postgres	Next.js (Turbopack)	0.953s	1.205s	0.000s	1.237s	0.284s	49	1.03x
🐘 Postgres	Nitro	0.965s (~)	1.152s (-7.7% 🟢)	0.000s (+41.2% 🔺)	1.178s (-6.4% 🟢)	0.213s	51	1.05x
💻 Local	Express	1.046s (-14.6% 🟢)	1.780s (-11.9% 🟢)	0.000s (+14.7% 🔺)	1.782s (-11.9% 🟢)	0.736s	34	1.13x
💻 Local	Nitro	1.224s (~)	2.022s (~)	0.000s (+233.3% 🔺)	2.024s (~)	0.800s	30	1.33x
💻 Local	Next.js (Turbopack)	1.274s	2.019s	0.000s	2.022s	0.749s	30	1.38x

▲ Production (Vercel)

World	Framework	Workflow Time	TTFB	Slurp	Wall Time	Overhead	Samples	vs Fastest
▲ Vercel	🥇 Next.js (Turbopack)	3.372s (-66.9% 🟢)	4.694s (-59.3% 🟢)	0.000s (NaN%)	5.167s (-57.1% 🟢)	1.795s	12	1.00x
▲ Vercel	Express	⚠️missing	-	-	-	-	-
▲ Vercel	Nitro	⚠️missing	-	-	-	-	-

🔍 Observability: Next.js (Turbopack)

fan-out fan-in 10 streams (1MB each)

💻 Local Development

World	Framework	Workflow Time	TTFB	Slurp	Wall Time	Overhead	Samples	vs Fastest
🐘 Postgres	🥇 Express	1.652s (-6.8% 🟢)	2.106s (-3.3%)	0.000s (+Infinity% 🔺)	2.115s (-3.8%)	0.463s	29	1.00x
🐘 Postgres	Nitro	1.793s (~)	2.178s (+1.7%)	0.000s (+200.0% 🔺)	2.189s (+0.7%)	0.396s	28	1.09x
🐘 Postgres	Next.js (Turbopack)	1.851s	2.182s	0.000s	2.191s	0.340s	28	1.12x
💻 Local	Express	2.949s (-15.0% 🟢)	3.294s (-18.3% 🟢)	0.000s (-80.3% 🟢)	3.296s (-18.4% 🟢)	0.347s	19	1.79x
💻 Local	Nitro	3.503s (+3.4%)	3.973s (-1.5%)	0.001s (+87.5% 🔺)	3.976s (-1.5%)	0.473s	16	2.12x
💻 Local	Next.js (Turbopack)	3.645s	4.098s	0.000s	4.103s	0.457s	15	2.21x

▲ Production (Vercel)

World	Framework	Workflow Time	TTFB	Slurp	Wall Time	Overhead	Samples	vs Fastest
▲ Vercel	🥇 Next.js (Turbopack)	4.283s (-23.8% 🟢)	5.674s (-18.7% 🟢)	0.000s (-100.0% 🟢)	6.234s (-17.3% 🟢)	1.952s	11	1.00x
▲ Vercel	Express	⚠️missing	-	-	-	-	-
▲ Vercel	Nitro	⚠️missing	-	-	-	-	-

🔍 Observability: Next.js (Turbopack)

Summary

Fastest Framework by World

Winner determined by most benchmark wins

World	🥇 Fastest Framework	Wins
💻 Local	Express	21/21
🐘 Postgres	Express	21/21
▲ Vercel	Next.js (Turbopack)	21/21

Fastest World by Framework

Winner determined by most benchmark wins

Framework	🥇 Fastest World	Wins
Express	🐘 Postgres	19/21
Next.js (Turbopack)	🐘 Postgres	17/21
Nitro	🐘 Postgres	17/21

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
🌐 Turso: Community world (local development)
🌐 MongoDB: Community world (local development)
🌐 Redis: Community world (local development)
🌐 Jazz: Community world (local development)

📋 View full workflow run

❌ Some benchmark jobs failed:

Local: success
Postgres: success
Vercel: failure

Check the workflow run for details.

github-actions · 2026-04-30T02:14:52Z

🧪 E2E Test Results

✅ All tests passed

Summary

	Passed	Skipped	Total
✅ ▲ Vercel Production	1011	67	1078
✅ 💻 Local Development	1090	86	1176
✅ 📦 Local Production	1090	86	1176
✅ 🐘 Local Postgres	1090	86	1176
✅ 🪟 Windows	98	0	98
✅ 📋 Other	552	36	588
Total	4931	361	5292

Details by Category

✅ ▲ Vercel Production

App	Passed	Skipped
✅ astro	91	7
✅ example	91	7
✅ express	91	7
✅ fastify	91	7
✅ hono	91	7
✅ nextjs-turbopack	96	2
✅ nextjs-webpack	96	2
✅ nitro	91	7
✅ nuxt	91	7
✅ sveltekit	91	7
✅ vite	91	7

✅ 💻 Local Development

App	Passed	Skipped
✅ astro-stable	92	6
✅ express-stable	92	6
✅ fastify-stable	92	6
✅ hono-stable	92	6
✅ nextjs-turbopack-canary	79	19
✅ nextjs-turbopack-stable	98	0
✅ nextjs-webpack-canary	79	19
✅ nextjs-webpack-stable	98	0
✅ nitro-stable	92	6
✅ nuxt-stable	92	6
✅ sveltekit-stable	92	6
✅ vite-stable	92	6

✅ 📦 Local Production

App	Passed	Skipped
✅ astro-stable	92	6
✅ express-stable	92	6
✅ fastify-stable	92	6
✅ hono-stable	92	6
✅ nextjs-turbopack-canary	79	19
✅ nextjs-turbopack-stable	98	0
✅ nextjs-webpack-canary	79	19
✅ nextjs-webpack-stable	98	0
✅ nitro-stable	92	6
✅ nuxt-stable	92	6
✅ sveltekit-stable	92	6
✅ vite-stable	92	6

✅ 🐘 Local Postgres

App	Passed	Skipped
✅ astro-stable	92	6
✅ express-stable	92	6
✅ fastify-stable	92	6
✅ hono-stable	92	6
✅ nextjs-turbopack-canary	79	19
✅ nextjs-turbopack-stable	98	0
✅ nextjs-webpack-canary	79	19
✅ nextjs-webpack-stable	98	0
✅ nitro-stable	92	6
✅ nuxt-stable	92	6
✅ sveltekit-stable	92	6
✅ vite-stable	92	6

✅ 🪟 Windows

App	Passed	Failed	Skipped
✅ nextjs-turbopack	98	0	0

✅ 📋 Other

App	Passed	Skipped
✅ e2e-local-dev-nest-stable	92	6
✅ e2e-local-dev-tanstack-start-stable	92	6
✅ e2e-local-postgres-nest-stable	92	6
✅ e2e-local-postgres-tanstack-start-stable	92	6
✅ e2e-local-prod-nest-stable	92	6
✅ e2e-local-prod-tanstack-start-stable	92	6

📋 View full workflow run

socket-security · 2026-04-30T02:15:56Z

Review the following changes in direct dependencies. Learn more about Socket for GitHub.

Diff	Package	Supply Chain Security	Vulnerability	Quality	Maintenance	License
	npm/@types/react-dom@19.2.3
	npm/@types/react@19.2.3
	npm/@tanstack/react-start@1.167.52
	npm/@vitejs/plugin-react@5.2.0

View full report

TanStack Start runs on Vite + Nitro, so the existing workflow/vite plugin already supports it - this PR just adds a workbench app to exercise the combination in the e2e test suite, plus a getting-started doc. The workbench app mirrors workbench/vite (symlinked workflows + nitro pg plugin) but uses TanStack Start's file-based router for the test routes. Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

Signed-off-by: Peter Wielander <mittgfu@gmail.com>

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VaguelySerious mentioned this pull request Apr 30, 2026
feat: add tanstack support #877
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VaguelySerious marked this pull request as ready for review May 3, 2026 00:25

fix changeset
0e796e3
Signed-off-by: Peter Wielander <mittgfu@gmail.com>

VaguelySerious enabled auto-merge (squash) May 3, 2026 01:35

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pranaygp approved these changes May 4, 2026
View reviewed changes

Merge branch 'main' into peter/tanstack-start
bdfbb81

This was referenced May 4, 2026
[ci] Enable Vercel-prod e2e for tanstack-start #1904
Merged
[backport] [workbench] Add TanStack Start workbench (#1875, #1907) #1914
Merged

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📊 Benchmark Results

💻 Local Development

▲ Production (Vercel)

💻 Local Development

▲ Production (Vercel)

💻 Local Development

▲ Production (Vercel)

💻 Local Development

▲ Production (Vercel)

💻 Local Development

▲ Production (Vercel)

💻 Local Development

▲ Production (Vercel)

💻 Local Development

▲ Production (Vercel)

💻 Local Development

▲ Production (Vercel)

💻 Local Development

▲ Production (Vercel)

💻 Local Development

▲ Production (Vercel)

💻 Local Development

▲ Production (Vercel)

💻 Local Development

▲ Production (Vercel)

💻 Local Development

▲ Production (Vercel)

💻 Local Development

▲ Production (Vercel)

💻 Local Development

▲ Production (Vercel)

💻 Local Development

▲ Production (Vercel)

💻 Local Development

▲ Production (Vercel)

💻 Local Development

▲ Production (Vercel)

💻 Local Development

▲ Production (Vercel)

💻 Local Development

▲ Production (Vercel)

💻 Local Development

▲ Production (Vercel)

Summary

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🧪 E2E Test Results

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