[codex] Fix detached ArrayBuffer proxy DX by pranaygp · Pull Request #1985 · vercel/workflow

pranaygp · 2026-05-14T18:16:23Z

Summary

improve @workflow/world-local queue logging for the Cannot perform ArrayBuffer.prototype.slice on a detached ArrayBuffer failure mode
point developers at the concrete Next.js proxy.ts / middleware.ts matcher fix when /.well-known/workflow/* is being intercepted
make the Next.js getting-started docs easier to discover for both v4 and v5 users
add a changeset for the local-world package

Root cause

When a Next.js proxy or middleware reads the request body for Workflow's internal POST /.well-known/workflow/v1/flow request, the underlying ArrayBuffer can be detached before the executor reads it. The local queue then surfaces an undici-style fetch failed error with a detached-ArrayBuffer cause, which is technically correct but not actionable enough on its own.

What changed

detect the detached-ArrayBuffer error chain in packages/world-local/src/queue.ts
replace the raw async queue failure log with an actionable hint and docs link for this specific case
add a queue regression test for the rejected-fetch path
update the Next.js docs copy in docs/content/docs/v4/getting-started/next.mdx and docs/content/docs/v5/getting-started/next.mdx

Closes #1982

Validation

git diff --check
package tests could not be run in this worktree because pnpm, npm, corepack, and node_modules are unavailable here

vercel · 2026-05-14T18:16:25Z

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changeset-bot · 2026-05-14T18:16:28Z

🦋 Changeset detected

Latest commit: e401ced

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

This PR includes changesets to release 20 packages

Name	Type
@workflow/world-local	Patch
@workflow/cli	Patch
@workflow/core	Patch
@workflow/vitest	Patch
@workflow/world-postgres	Patch
tarballs	Patch
workflow	Patch
@workflow/world-testing	Patch
@workflow/builders	Patch
@workflow/next	Patch
@workflow/nitro	Patch
@workflow/web-shared	Patch
@workflow/web	Patch
@workflow/ai	Patch
@workflow/astro	Patch
@workflow/nest	Patch
@workflow/rollup	Patch
@workflow/sveltekit	Patch
@workflow/vite	Patch
@workflow/nuxt	Patch

Not sure what this means? Click here to learn what changesets are.

Click here if you're a maintainer who wants to add another changeset to this PR

github-actions · 2026-05-14T18:16:35Z

📊 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	0.030s (-31.8% 🟢)	1.005s (~)	0.974s	10	1.00x
💻 Local	Nitro	0.031s (-28.5% 🟢)	1.006s (~)	0.975s	10	1.02x
🐘 Postgres	Express	0.043s (-25.2% 🟢)	1.011s (~)	0.967s	10	1.44x
🐘 Postgres	Nitro	0.301s (+216.1% 🔺)	1.148s (+10.0% 🔺)	0.847s	10	9.96x
💻 Local	Next.js (Turbopack)	⚠️ missing	-	-	-	-
🐘 Postgres	Next.js (Turbopack)	⚠️ missing	-	-	-	-

▲ Production (Vercel)

World	Framework	Workflow Time	Wall Time	Overhead	Samples	vs Fastest
▲ Vercel	🥇 Next.js (Turbopack)	0.326s (+29.7% 🔺)	2.228s (-4.5%)	1.902s	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	🥇 Nitro	1.068s (-5.6% 🟢)	2.007s (~)	0.938s	10	1.00x
💻 Local	Express	1.071s (-4.8%)	2.006s (~)	0.935s	10	1.00x
🐘 Postgres	Express	1.083s (-5.6% 🟢)	2.009s (~)	0.927s	10	1.01x
🐘 Postgres	Nitro	1.313s (+15.1% 🔺)	2.043s (+1.7%)	0.731s	10	1.23x
💻 Local	Next.js (Turbopack)	⚠️ missing	-	-	-	-
🐘 Postgres	Next.js (Turbopack)	⚠️ missing	-	-	-	-

▲ Production (Vercel)

World	Framework	Workflow Time	Wall Time	Overhead	Samples	vs Fastest
▲ Vercel	🥇 Next.js (Turbopack)	1.745s (-14.2% 🟢)	3.521s (-8.1% 🟢)	1.776s	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
💻 Local	🥇 Express	10.409s (-4.7%)	11.022s (~)	0.613s	3	1.00x
💻 Local	Nitro	10.410s (-4.9%)	11.021s (~)	0.611s	3	1.00x
🐘 Postgres	Express	10.420s (-5.0%)	11.015s (~)	0.595s	3	1.00x
🐘 Postgres	Nitro	11.460s (+5.4% 🔺)	11.799s (+7.0% 🔺)	0.340s	3	1.10x
💻 Local	Next.js (Turbopack)	⚠️ missing	-	-	-	-
🐘 Postgres	Next.js (Turbopack)	⚠️ missing	-	-	-	-

▲ Production (Vercel)

World	Framework	Workflow Time	Wall Time	Overhead	Samples	vs Fastest
▲ Vercel	🥇 Next.js (Turbopack)	13.874s (-19.9% 🟢)	15.338s (-20.9% 🟢)	1.464s	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
💻 Local	🥇 Nitro	13.437s (-10.8% 🟢)	14.026s (-12.5% 🟢)	0.589s	5	1.00x
💻 Local	Express	13.452s (-10.1% 🟢)	14.027s (-6.7% 🟢)	0.575s	5	1.00x
🐘 Postgres	Express	13.463s (-7.7% 🟢)	14.016s (-6.7% 🟢)	0.554s	5	1.00x
🐘 Postgres	Nitro	16.041s (+9.9% 🔺)	16.789s (+11.7% 🔺)	0.749s	4	1.19x
💻 Local	Next.js (Turbopack)	⚠️ missing	-	-	-	-
🐘 Postgres	Next.js (Turbopack)	⚠️ missing	-	-	-	-

▲ Production (Vercel)

World	Framework	Workflow Time	Wall Time	Overhead	Samples	vs Fastest
▲ Vercel	🥇 Next.js (Turbopack)	22.123s (-57.9% 🟢)	23.610s (-56.8% 🟢)	1.487s	3	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
💻 Local	🥇 Express	11.862s (-28.5% 🟢)	12.021s (-29.4% 🟢)	0.159s	8	1.00x
💻 Local	Nitro	11.909s (-29.0% 🟢)	12.272s (-27.9% 🟢)	0.364s	8	1.00x
🐘 Postgres	Express	11.971s (-14.5% 🟢)	12.264s (-16.0% 🟢)	0.293s	8	1.01x
🐘 Postgres	Nitro	14.156s (+1.4%)	14.637s (+2.3%)	0.481s	7	1.19x
💻 Local	Next.js (Turbopack)	⚠️ missing	-	-	-	-
🐘 Postgres	Next.js (Turbopack)	⚠️ missing	-	-	-	-

▲ Production (Vercel)

World	Framework	Workflow Time	Wall Time	Overhead	Samples	vs Fastest
▲ Vercel	🥇 Next.js (Turbopack)	35.672s (-90.9% 🟢)	39.361s (-90.0% 🟢)	3.689s	3	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	1.143s (-9.3% 🟢)	2.007s (~)	0.864s	15	1.00x
💻 Local	Nitro	1.171s (-28.2% 🟢)	2.006s (-3.3%)	0.835s	15	1.02x
💻 Local	Express	1.179s (-20.8% 🟢)	2.006s (~)	0.827s	15	1.03x
🐘 Postgres	Nitro	1.550s (+21.6% 🔺)	2.203s (+9.6% 🔺)	0.653s	14	1.36x
💻 Local	Next.js (Turbopack)	⚠️ missing	-	-	-	-
🐘 Postgres	Next.js (Turbopack)	⚠️ missing	-	-	-	-

▲ Production (Vercel)

World	Framework	Workflow Time	Wall Time	Overhead	Samples	vs Fastest
▲ Vercel	🥇 Next.js (Turbopack)	2.879s (-15.3% 🟢)	4.579s (-7.2% 🟢)	1.699s	7	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	1.187s (-49.7% 🟢)	2.007s (-33.3% 🟢)	0.820s	15	1.00x
💻 Local	Nitro	1.686s (-46.4% 🟢)	2.005s (-48.4% 🟢)	0.319s	15	1.42x
💻 Local	Express	1.761s (-40.4% 🟢)	2.005s (-41.9% 🟢)	0.245s	15	1.48x
🐘 Postgres	Nitro	1.799s (-23.5% 🟢)	2.560s (-14.9% 🟢)	0.761s	12	1.52x
💻 Local	Next.js (Turbopack)	⚠️ missing	-	-	-	-
🐘 Postgres	Next.js (Turbopack)	⚠️ missing	-	-	-	-

▲ Production (Vercel)

World	Framework	Workflow Time	Wall Time	Overhead	Samples	vs Fastest
▲ Vercel	🥇 Next.js (Turbopack)	5.286s (-25.5% 🟢)	7.216s (-19.0% 🟢)	1.930s	5	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	1.284s (-63.2% 🟢)	2.008s (-49.9% 🟢)	0.724s	15	1.00x
🐘 Postgres	Nitro	2.279s (-34.5% 🟢)	3.169s (-20.9% 🟢)	0.890s	10	1.78x
💻 Local	Nitro	4.725s (-43.4% 🟢)	5.179s (-42.6% 🟢)	0.454s	6	3.68x
💻 Local	Express	5.445s (-34.7% 🟢)	5.846s (-35.2% 🟢)	0.401s	6	4.24x
💻 Local	Next.js (Turbopack)	⚠️ missing	-	-	-	-
🐘 Postgres	Next.js (Turbopack)	⚠️ missing	-	-	-	-

▲ Production (Vercel)

World	Framework	Workflow Time	Wall Time	Overhead	Samples	vs Fastest
▲ Vercel	🥇 Next.js (Turbopack)	5.425s (-39.1% 🟢)	7.217s (-34.2% 🟢)	1.792s	5	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	1.135s (-9.7% 🟢)	2.009s (~)	0.874s	15	1.00x
💻 Local	Nitro	1.351s (-27.6% 🟢)	2.006s (-14.3% 🟢)	0.655s	15	1.19x
💻 Local	Express	1.442s (-23.9% 🟢)	2.006s (-15.1% 🟢)	0.564s	15	1.27x
🐘 Postgres	Nitro	1.459s (+16.1% 🔺)	2.037s (+1.5%)	0.578s	15	1.29x
💻 Local	Next.js (Turbopack)	⚠️ missing	-	-	-	-
🐘 Postgres	Next.js (Turbopack)	⚠️ missing	-	-	-	-

▲ Production (Vercel)

World	Framework	Workflow Time	Wall Time	Overhead	Samples	vs Fastest
▲ Vercel	🥇 Next.js (Turbopack)	2.569s (-12.4% 🟢)	4.002s (-13.8% 🟢)	1.433s	8	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	1.197s (-48.9% 🟢)	2.007s (-33.3% 🟢)	0.810s	15	1.00x
🐘 Postgres	Nitro	1.557s (-33.4% 🟢)	2.407s (-20.0% 🟢)	0.850s	13	1.30x
💻 Local	Nitro	1.793s (-41.5% 🟢)	2.151s (-44.7% 🟢)	0.358s	14	1.50x
💻 Local	Express	2.190s (-30.1% 🟢)	2.508s (-33.4% 🟢)	0.317s	12	1.83x
💻 Local	Next.js (Turbopack)	⚠️ missing	-	-	-	-
🐘 Postgres	Next.js (Turbopack)	⚠️ missing	-	-	-	-

▲ Production (Vercel)

World	Framework	Workflow Time	Wall Time	Overhead	Samples	vs Fastest
▲ Vercel	🥇 Next.js (Turbopack)	4.744s (+51.0% 🔺)	6.187s (+36.8% 🔺)	1.443s	5	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	1.272s (-63.6% 🟢)	2.007s (-50.0% 🟢)	0.735s	15	1.00x
🐘 Postgres	Nitro	2.000s (-42.5% 🟢)	2.717s (-32.2% 🟢)	0.718s	12	1.57x
💻 Local	Nitro	4.902s (-46.4% 🟢)	5.345s (-46.7% 🟢)	0.443s	6	3.85x
💻 Local	Express	6.083s (-30.9% 🟢)	6.414s (-30.8% 🟢)	0.331s	5	4.78x
💻 Local	Next.js (Turbopack)	⚠️ missing	-	-	-	-
🐘 Postgres	Next.js (Turbopack)	⚠️ missing	-	-	-	-

▲ Production (Vercel)

World	Framework	Workflow Time	Wall Time	Overhead	Samples	vs Fastest
▲ Vercel	🥇 Next.js (Turbopack)	7.367s (+9.0% 🔺)	9.079s (+6.3% 🔺)	1.713s	4	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	0.472s (-43.7% 🟢)	1.023s (~)	0.551s	59	1.00x
💻 Local	Express	0.486s (-50.6% 🟢)	1.004s (-6.7% 🟢)	0.518s	60	1.03x
💻 Local	Nitro	0.490s (-50.0% 🟢)	1.004s (-8.2% 🟢)	0.514s	60	1.04x
🐘 Postgres	Nitro	0.869s (+5.9% 🔺)	1.344s (+33.6% 🔺)	0.475s	45	1.84x
💻 Local	Next.js (Turbopack)	⚠️ missing	-	-	-	-
🐘 Postgres	Next.js (Turbopack)	⚠️ missing	-	-	-	-

▲ Production (Vercel)

World	Framework	Workflow Time	Wall Time	Overhead	Samples	vs Fastest
▲ Vercel	🥇 Next.js (Turbopack)	5.726s (-60.5% 🟢)	7.340s (-54.4% 🟢)	1.614s	9	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	1.082s (-45.3% 🟢)	1.806s (-20.0% 🟢)	0.724s	50	1.00x
💻 Local	Express	1.181s (-60.8% 🟢)	2.005s (-44.1% 🟢)	0.824s	45	1.09x
💻 Local	Nitro	1.190s (-60.8% 🟢)	2.006s (-46.6% 🟢)	0.816s	45	1.10x
🐘 Postgres	Nitro	2.562s (+32.9% 🔺)	3.079s (+46.6% 🔺)	0.517s	30	2.37x
💻 Local	Next.js (Turbopack)	⚠️ missing	-	-	-	-
🐘 Postgres	Next.js (Turbopack)	⚠️ missing	-	-	-	-

▲ Production (Vercel)

World	Framework	Workflow Time	Wall Time	Overhead	Samples	vs Fastest
▲ Vercel	🥇 Next.js (Turbopack)	14.376s (-71.1% 🟢)	16.151s (-68.8% 🟢)	1.775s	6	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	1.976s (-50.5% 🟢)	2.207s (-49.5% 🟢)	0.231s	55	1.00x
💻 Local	Express	2.652s (-71.2% 🟢)	3.007s (-70.0% 🟢)	0.355s	40	1.34x
💻 Local	Nitro	2.727s (-70.7% 🟢)	3.033s (-69.7% 🟢)	0.306s	40	1.38x
🐘 Postgres	Nitro	3.383s (-17.6% 🟢)	3.949s (-14.2% 🟢)	0.566s	31	1.71x
💻 Local	Next.js (Turbopack)	⚠️ missing	-	-	-	-
🐘 Postgres	Next.js (Turbopack)	⚠️ missing	-	-	-	-

▲ Production (Vercel)

World	Framework	Workflow Time	Wall Time	Overhead	Samples	vs Fastest
▲ Vercel	🥇 Next.js (Turbopack)	43.378s (-59.5% 🟢)	45.035s (-58.7% 🟢)	1.657s	3	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	0.164s (-42.0% 🟢)	1.006s (~)	0.842s	60	1.00x
💻 Local	Express	0.444s (-20.8% 🟢)	1.004s (~)	0.560s	60	2.71x
💻 Local	Nitro	0.459s (-24.0% 🟢)	1.004s (-1.7%)	0.545s	60	2.80x
🐘 Postgres	Nitro	0.602s (+112.5% 🔺)	1.185s (+17.7% 🔺)	0.583s	52	3.67x
💻 Local	Next.js (Turbopack)	⚠️ missing	-	-	-	-
🐘 Postgres	Next.js (Turbopack)	⚠️ missing	-	-	-	-

▲ Production (Vercel)

World	Framework	Workflow Time	Wall Time	Overhead	Samples	vs Fastest
▲ Vercel	🥇 Next.js (Turbopack)	2.687s (+32.8% 🔺)	4.206s (+10.9% 🔺)	1.520s	15	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	0.281s (-44.9% 🟢)	1.006s (~)	0.725s	90	1.00x
🐘 Postgres	Nitro	1.106s (+122.9% 🔺)	1.680s (+66.9% 🔺)	0.574s	54	3.94x
💻 Local	Express	2.150s (-14.4% 🟢)	2.943s (-2.2%)	0.793s	31	7.65x
💻 Local	Nitro	2.273s (-10.4% 🟢)	2.944s (-2.2%)	0.671s	31	8.09x
💻 Local	Next.js (Turbopack)	⚠️ missing	-	-	-	-
🐘 Postgres	Next.js (Turbopack)	⚠️ missing	-	-	-	-

▲ Production (Vercel)

World	Framework	Workflow Time	Wall Time	Overhead	Samples	vs Fastest
▲ Vercel	🥇 Next.js (Turbopack)	10.672s (+201.9% 🔺)	12.206s (+135.0% 🔺)	1.533s	8	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	0.560s (-31.6% 🟢)	1.005s (-1.2%)	0.445s	120	1.00x
🐘 Postgres	Nitro	1.769s (+123.8% 🔺)	2.310s (+129.3% 🔺)	0.542s	52	3.16x
💻 Local	Nitro	9.971s (-10.9% 🟢)	10.613s (-9.0% 🟢)	0.642s	12	17.80x
💻 Local	Express	10.131s (-9.5% 🟢)	10.779s (-9.7% 🟢)	0.648s	12	18.09x
💻 Local	Next.js (Turbopack)	⚠️ missing	-	-	-	-
🐘 Postgres	Next.js (Turbopack)	⚠️ missing	-	-	-	-

▲ Production (Vercel)

World	Framework	Workflow Time	Wall Time	Overhead	Samples	vs Fastest
▲ Vercel	🥇 Next.js (Turbopack)	28.565s (+176.6% 🔺)	30.319s (+146.8% 🔺)	1.754s	4	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	1.135s (+453.2% 🔺)	2.000s (+100.3% 🔺)	0.001s (-31.3% 🟢)	2.009s (+98.6% 🔺)	0.875s	10	1.00x
💻 Local	Express	1.135s (+470.1% 🔺)	2.005s (+99.6% 🔺)	0.012s (-2.5%)	2.019s (+98.3% 🔺)	0.884s	10	1.00x
💻 Local	Nitro	1.143s (+435.0% 🔺)	2.005s (+99.6% 🔺)	0.010s (-18.4% 🟢)	2.018s (+98.0% 🔺)	0.874s	10	1.01x
🐘 Postgres	Nitro	1.416s (+590.7% 🔺)	2.004s (+100.5% 🔺)	0.100s (+6533.3% 🔺)	2.144s (+112.0% 🔺)	0.728s	10	1.25x
💻 Local	Next.js (Turbopack)	⚠️ missing	-	-	-	-	-
🐘 Postgres	Next.js (Turbopack)	⚠️ missing	-	-	-	-	-

▲ Production (Vercel)

World	Framework	Workflow Time	TTFB	Slurp	Wall Time	Overhead	Samples	vs Fastest
▲ Vercel	🥇 Next.js (Turbopack)	2.569s (-62.5% 🟢)	3.412s (-60.6% 🟢)	2.882s (+356.1% 🔺)	6.709s (-31.5% 🟢)	4.140s	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	1.519s (+141.2% 🔺)	2.009s (+99.6% 🔺)	0.003s (-9.5% 🟢)	2.024s (+97.9% 🔺)	0.505s	30	1.00x
💻 Local	Express	1.536s (+102.9% 🔺)	2.012s (+95.5% 🔺)	0.009s (~)	2.023s (+94.6% 🔺)	0.487s	30	1.01x
💻 Local	Nitro	1.544s (+84.1% 🔺)	2.011s (+98.8% 🔺)	0.010s (+6.4% 🔺)	2.023s (+81.3% 🔺)	0.479s	30	1.02x
🐘 Postgres	Nitro	3.177s (+409.1% 🔺)	3.604s (+258.0% 🔺)	0.003s (-23.2% 🟢)	3.686s (+260.5% 🔺)	0.508s	17	2.09x
💻 Local	Next.js (Turbopack)	⚠️ missing	-	-	-	-	-
🐘 Postgres	Next.js (Turbopack)	⚠️ missing	-	-	-	-	-

▲ Production (Vercel)

World	Framework	Workflow Time	TTFB	Slurp	Wall Time	Overhead	Samples	vs Fastest
▲ Vercel	🥇 Next.js (Turbopack)	6.008s (-64.5% 🟢)	7.055s (-61.3% 🟢)	0.244s (+15.5% 🔺)	7.733s (-59.2% 🟢)	1.725s	8	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	0.659s (-31.4% 🟢)	1.054s (-17.5% 🟢)	0.000s (+21.1% 🔺)	1.061s (-18.8% 🟢)	0.402s	57	1.00x
💻 Local	Express	1.363s (+11.2% 🔺)	2.015s (~)	0.000s (+10.0% 🔺)	2.017s (~)	0.655s	30	2.07x
💻 Local	Nitro	1.407s (+15.1% 🔺)	2.017s (~)	0.000s (+233.3% 🔺)	2.020s (~)	0.612s	30	2.14x
🐘 Postgres	Nitro	2.450s (+152.9% 🔺)	2.808s (+125.1% 🔺)	0.000s (+14.3% 🔺)	2.875s (+128.6% 🔺)	0.425s	21	3.72x
💻 Local	Next.js (Turbopack)	⚠️ missing	-	-	-	-	-
🐘 Postgres	Next.js (Turbopack)	⚠️ missing	-	-	-	-	-

▲ Production (Vercel)

World	Framework	Workflow Time	TTFB	Slurp	Wall Time	Overhead	Samples	vs Fastest
▲ Vercel	🥇 Next.js (Turbopack)	3.725s (-63.4% 🟢)	4.905s (-57.4% 🟢)	0.000s (+Infinity% 🔺)	5.312s (-55.9% 🟢)	1.588s	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	1.284s (-27.5% 🟢)	1.968s (-9.6% 🟢)	0.000s (+Infinity% 🔺)	1.981s (-9.9% 🟢)	0.696s	31	1.00x
💻 Local	Nitro	3.170s (-6.4% 🟢)	3.907s (-3.1%)	0.000s (-18.0% 🟢)	3.909s (-3.1%)	0.739s	16	2.47x
💻 Local	Express	3.460s (~)	3.828s (-5.1% 🟢)	0.000s (-58.3% 🟢)	4.166s (+3.2%)	0.706s	15	2.69x
🐘 Postgres	Nitro	4.511s (+151.8% 🔺)	4.842s (+126.1% 🔺)	0.000s (-100.0% 🟢)	5.009s (+130.4% 🔺)	0.498s	12	3.51x
💻 Local	Next.js (Turbopack)	⚠️ missing	-	-	-	-	-
🐘 Postgres	Next.js (Turbopack)	⚠️ missing	-	-	-	-	-

▲ Production (Vercel)

World	Framework	Workflow Time	TTFB	Slurp	Wall Time	Overhead	Samples	vs Fastest
▲ Vercel	🥇 Next.js (Turbopack)	6.094s (+8.5% 🔺)	7.427s (+6.4% 🔺)	0.000s (-100.0% 🟢)	7.839s (+4.0%)	1.745s	8	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	11/21
🐘 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	16/21
Next.js (Turbopack)	▲ Vercel	21/21
Nitro	💻 Local	16/21

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 · 2026-05-14T18:16:36Z

🧪 E2E Test Results

❌ Some tests failed

Summary

	Passed	Failed	Skipped	Total
❌ ▲ Vercel Production	1198	2	219	1419
✅ 💻 Local Development	1587	0	219	1806
✅ 📦 Local Production	1587	0	219	1806
❌ 🐘 Local Postgres	1586	1	219	1806
✅ 🪟 Windows	129	0	0	129
✅ 📋 Other	727	0	176	903
Total	6814	3	1052	7869

❌ Failed Tests

▲ Vercel Production (2 failed)

nextjs-turbopack (1 failed):

fibonacciWorkflow - recursive workflow composition via start() | wrun_01KRM8M5JMW42PMWKDC52PG37Z | 🔍 observability

vite (1 failed):

fibonacciWorkflow - recursive workflow composition via start() | wrun_01KRM8M5JMW42PMWKDC52PG37Z | 🔍 observability

🐘 Local Postgres (1 failed)

nextjs-webpack-stable-lazy-discovery-enabled (1 failed):

addTenWorkflow | wrun_01KRM88AJMT25D474EH06T0B5T

Details by Category

❌ ▲ Vercel Production

App	Passed	Failed	Skipped
✅ astro	103	0	26
✅ example	103	0	26
✅ express	103	0	26
✅ fastify	103	0	26
✅ hono	103	0	26
❌ nextjs-turbopack	126	1	2
✅ nextjs-webpack	127	0	2
✅ nitro	103	0	26
✅ nuxt	103	0	26
✅ sveltekit	122	0	7
❌ vite	102	1	26

✅ 💻 Local Development

App	Passed	Skipped
✅ astro-stable	104	25
✅ express-stable	104	25
✅ fastify-stable	104	25
✅ hono-stable	104	25
✅ nextjs-turbopack-canary	110	19
✅ nextjs-turbopack-stable-lazy-discovery-disabled	129	0
✅ nextjs-turbopack-stable-lazy-discovery-enabled	129	0
✅ nextjs-webpack-canary	110	19
✅ nextjs-webpack-stable-lazy-discovery-disabled	129	0
✅ nextjs-webpack-stable-lazy-discovery-enabled	129	0
✅ nitro-stable	104	25
✅ nuxt-stable	104	25
✅ sveltekit-stable	123	6
✅ vite-stable	104	25

✅ 📦 Local Production

App	Passed	Skipped
✅ astro-stable	104	25
✅ express-stable	104	25
✅ fastify-stable	104	25
✅ hono-stable	104	25
✅ nextjs-turbopack-canary	110	19
✅ nextjs-turbopack-stable-lazy-discovery-disabled	129	0
✅ nextjs-turbopack-stable-lazy-discovery-enabled	129	0
✅ nextjs-webpack-canary	110	19
✅ nextjs-webpack-stable-lazy-discovery-disabled	129	0
✅ nextjs-webpack-stable-lazy-discovery-enabled	129	0
✅ nitro-stable	104	25
✅ nuxt-stable	104	25
✅ sveltekit-stable	123	6
✅ vite-stable	104	25

❌ 🐘 Local Postgres

App	Passed	Failed	Skipped
✅ astro-stable	104	0	25
✅ express-stable	104	0	25
✅ fastify-stable	104	0	25
✅ hono-stable	104	0	25
✅ nextjs-turbopack-canary	110	0	19
✅ nextjs-turbopack-stable-lazy-discovery-disabled	129	0	0
✅ nextjs-turbopack-stable-lazy-discovery-enabled	129	0	0
✅ nextjs-webpack-canary	110	0	19
✅ nextjs-webpack-stable-lazy-discovery-disabled	129	0	0
❌ nextjs-webpack-stable-lazy-discovery-enabled	128	1	0
✅ nitro-stable	104	0	25
✅ nuxt-stable	104	0	25
✅ sveltekit-stable	123	0	6
✅ vite-stable	104	0	25

✅ 🪟 Windows

App	Passed	Failed	Skipped
✅ nextjs-turbopack	129	0	0

✅ 📋 Other

App	Passed	Skipped
✅ e2e-local-dev-nest-stable	104	25
✅ e2e-local-dev-tanstack-start-	104	25
✅ e2e-local-postgres-nest-stable	104	25
✅ e2e-local-postgres-tanstack-start-	104	25
✅ e2e-local-prod-nest-stable	104	25
✅ e2e-local-prod-tanstack-start-	104	25
✅ e2e-vercel-prod-tanstack-start	103	26

📋 View full workflow run

❌ Some E2E test jobs failed:

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

Check the workflow run for details.

pranaygp · 2026-05-14T18:19:08Z

+const DETACHED_ARRAYBUFFER_ERROR =
+  'Cannot perform ArrayBuffer.prototype.slice on a detached ArrayBuffer';
+const PROXY_HANDLER_DOCS_URL =
+  'https://useworkflow.dev/docs/getting-started/next#configure-proxy-handler';


Suggested change

'https://useworkflow.dev/docs/getting-started/next#configure-proxy-handler';

'https://workflow-sdk.dev/docs/getting-started/next#configure-proxy-handler';

* fix(world-local): explain detached ArrayBuffer proxy failures * fix(docs): make proxy handler anchor navigable * fix(docs): open accordions for hash links Signed-off-by: Pranay Prakash <pranay.gp@gmail.com>

github-actions · 2026-05-14T22:58:27Z

Backport PR opened against stable: #1998. Merge conflicts were resolved by AI — please review carefully.

* fix(world-local): explain detached ArrayBuffer proxy failures * fix(docs): make proxy handler anchor navigable * fix(docs): open accordions for hash links Signed-off-by: Pranay Prakash <pranay.gp@gmail.com> Co-authored-by: github-actions[bot] <41898282+github-actions[bot]@users.noreply.github.com>

fix(world-local): explain detached ArrayBuffer proxy failures

9a05560

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pranaygp commented May 14, 2026

View reviewed changes

fix(docs): make proxy handler anchor navigable

e0c425d

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fix(docs): open accordions for hash links

23b8b4e

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pranaygp disabled auto-merge May 14, 2026 22:57

pranaygp merged commit c145bf5 into main May 14, 2026
111 of 117 checks passed

pranaygp deleted the codex/fix-detached-arraybuffer-proxy-dx branch May 14, 2026 22:57

github-actions Bot mentioned this pull request May 14, 2026

Version Packages (beta) #1997

Open

github-actions Bot mentioned this pull request May 14, 2026

Backport #1985: [codex] Fix detached ArrayBuffer proxy DX #1998

Merged

	'https://useworkflow.dev/docs/getting-started/next#configure-proxy-handler';
	'https://workflow-sdk.dev/docs/getting-started/next#configure-proxy-handler';

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pranaygp commented May 14, 2026

Summary

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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

Summary

❌ Failed Tests

Details by Category

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