Add stream benchmarks and improve the benchmarking code

[pranaygp]

• Added a new simple benchmark for streams processing/transforming along with TTFB (essential for AI agents)
• Refactoring and QOL improvements on the benchmark itself and the github action

[changeset-bot]

🦋 Changeset detected

Latest commit: f33adf9

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

This PR includes changesets to release 13 packages

Name	Type
@workflow/world-local	Patch
@workflow/cli	Patch
@workflow/core	Patch
@workflow/world-postgres	Patch
workflow	Patch
@workflow/world-testing	Patch
@workflow/builders	Patch
@workflow/next	Patch
@workflow/nitro	Patch
@workflow/web-shared	Patch
@workflow/ai	Patch
@workflow/sveltekit	Patch
@workflow/nuxt	Patch

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

Project	Deployment	Preview	Comments	Updated (UTC)
example-nextjs-workflow-turbopack	Ready	Preview	Comment	Dec 1, 2025 7:20am
example-nextjs-workflow-webpack	Ready	Preview	Comment	Dec 1, 2025 7:20am
example-workflow	Ready	Preview	Comment	Dec 1, 2025 7:20am
workbench-express-workflow	Ready	Preview	Comment	Dec 1, 2025 7:20am
workbench-hono-workflow	Ready	Preview	Comment	Dec 1, 2025 7:20am
workbench-nitro-workflow	Ready	Preview	Comment	Dec 1, 2025 7:20am
workbench-nuxt-workflow	Ready	Preview	Comment	Dec 1, 2025 7:20am
workbench-sveltekit-workflow	Ready	Preview	Comment	Dec 1, 2025 7:20am
workbench-vite-workflow	Ready	Preview	Comment	Dec 1, 2025 7:20am
workflow-docs	Ready	Preview	Comment	Dec 1, 2025 7:20am

[github-actions]

📊 Benchmark Results

workflow with no steps

World	Framework	Workflow Time	Wall Time	Overhead	vs Fastest
💻 Local	🥇 Next.js (Turbopack)	0.039s	1.016s	0.977s	1.00x
💻 Local	Express	0.046s	1.007s	0.961s	1.17x
💻 Local	Nitro	0.046s	1.006s	0.960s	1.18x
🐘 Postgres	Express	0.218s	1.013s	0.795s	5.56x
🐘 Postgres	Next.js (Turbopack)	0.345s	1.021s	0.676s	8.78x
🐘 Postgres	Nitro	0.392s	1.012s	0.620s	9.98x
▲ Vercel	Express	0.471s	1.356s	0.886s	11.97x
▲ Vercel	Next.js (Turbopack)	0.472s	1.363s	0.891s	12.01x
▲ Vercel	Nitro	0.615s	1.652s	1.038s	15.64x

workflow with 1 step

World	Framework	Workflow Time	Wall Time	Overhead	vs Fastest
💻 Local	🥇 Next.js (Turbopack)	0.089s	1.011s	0.922s	1.00x
💻 Local	Express	0.111s	1.006s	0.895s	1.25x
💻 Local	Nitro	0.112s	1.005s	0.894s	1.25x
🐘 Postgres	Nitro	0.713s	1.009s	0.296s	8.02x
🐘 Postgres	Express	1.171s	2.012s	0.841s	13.17x
🐘 Postgres	Next.js (Turbopack)	1.333s	2.017s	0.684s	15.00x
▲ Vercel	Next.js (Turbopack)	1.372s	2.263s	0.890s	15.43x
▲ Vercel	Express	1.406s	2.393s	0.987s	15.81x
▲ Vercel	Nitro	1.470s	2.534s	1.065s	16.53x

workflow with 10 sequential steps

World	Framework	Workflow Time	Wall Time	Overhead	vs Fastest
💻 Local	🥇 Next.js (Turbopack)	0.621s	1.009s	0.388s	1.00x
💻 Local	Nitro	0.773s	1.006s	0.233s	1.25x
💻 Local	Express	0.774s	1.007s	0.233s	1.25x
🐘 Postgres	Nitro	5.055s	5.814s	0.759s	8.14x
🐘 Postgres	Express	5.462s	6.015s	0.553s	8.79x
▲ Vercel	Next.js (Turbopack)	9.478s	10.301s	0.822s	15.26x
▲ Vercel	Express	9.660s	10.400s	0.740s	15.55x
▲ Vercel	Nitro	9.849s	10.647s	0.798s	15.86x
🐘 Postgres	Next.js (Turbopack)	10.194s	11.029s	0.835s	16.41x

workflow with 10 parallel steps

World	Framework	Workflow Time	Wall Time	Overhead	vs Fastest
💻 Local	🥇 Next.js (Turbopack)	0.380s	1.011s	0.631s	1.00x
💻 Local	Express	0.394s	1.006s	0.612s	1.04x
💻 Local	Nitro	0.394s	1.005s	0.611s	1.04x
🐘 Postgres	Nitro	0.761s	1.410s	0.648s	2.01x
🐘 Postgres	Next.js (Turbopack)	1.285s	2.015s	0.729s	3.39x
🐘 Postgres	Express	1.474s	2.011s	0.537s	3.88x
▲ Vercel	Next.js (Turbopack)	2.560s	3.386s	0.827s	6.74x
▲ Vercel	Nitro	2.619s	3.428s	0.809s	6.90x
▲ Vercel	Express	2.647s	3.685s	1.039s	6.97x

---

Stream Benchmarks

Stream benchmarks include Time to First Byte (TTFB) metrics.

workflow with stream

World	Framework	Workflow Time	TTFB	Wall Time	Overhead	vs Fastest
💻 Local	🥇 Next.js (Turbopack)	0.164s	1.002s	1.013s	0.849s	1.00x
💻 Local	Nitro	0.174s	0.992s	1.008s	0.834s	1.06x
💻 Local	Express	0.175s	0.991s	1.009s	0.833s	1.07x
🐘 Postgres	Nitro	0.908s	1.471s	1.613s	0.704s	5.54x
🐘 Postgres	Next.js (Turbopack)	1.070s	1.509s	1.715s	0.645s	6.53x
🐘 Postgres	Express	1.220s	1.819s	2.011s	0.791s	7.44x
▲ Vercel	Next.js (Turbopack)	2.208s	2.313s	2.621s	0.414s	13.47x
▲ Vercel	Express	2.254s	2.489s	2.845s	0.590s	13.75x
▲ Vercel	Nitro	2.282s	2.468s	2.864s	0.581s	13.92x

---

Summary: Fastest Framework by World

Winner determined by most benchmark wins

World	🥇 Fastest Framework	Wins
💻 Local	Next.js (Turbopack)	5/5
🐘 Postgres	Nitro	4/5
▲ Vercel	Next.js (Turbopack)	4/5

Summary: Fastest World by Framework

Winner determined by most benchmark wins

Framework	🥇 Fastest World	Wins
Express	💻 Local	5/5
Next.js (Turbopack)	💻 Local	5/5
Nitro	💻 Local	5/5

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)
• Wall Time: Total testbench time (trigger workflow + poll for result)
• Overhead: Testbench overhead (Wall Time - Workflow Time)
• vs Fastest: How much slower compared to the fastest configuration for this benchmark

Worlds:

• 💻 Local: In-memory filesystem world
• 🐘 Postgres: PostgreSQL database world
• ▲ Vercel: Vercel production world