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[core] Add configurable stream flush interval per world#1533

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[core] Add configurable stream flush interval per world#1533
VaguelySerious wants to merge 4 commits intomainfrom
peter/issue-1517

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Summary

  • Adds streamFlushIntervalMs optional property to the Streamer interface in @workflow/world
  • WorkflowServerWritableStream reads this from the world, falling back to the existing 10ms default
  • world-local and world-postgres expose it as a config option; world-vercel always uses the default

Closes #1517

Test plan

  • Unit tests for streamFlushIntervalMs = 0 (immediate flush)
  • Unit tests for custom non-zero interval (50ms)
  • Unit tests for undefined fallback to default
  • Typecheck passes for all affected packages
  • Existing tests pass unchanged

🤖 Generated with Claude Code

Allow non-Vercel world implementations to override the 10ms stream
write buffer flush interval. Backends with sub-millisecond writes
(Redis, local filesystem) can set a lower value or 0 for immediate
flushing, reducing end-to-end stream latency.

Closes #1517

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
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changeset-bot bot commented Mar 27, 2026

🦋 Changeset detected

Latest commit: f6c1d23

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

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github-actions bot commented Mar 27, 2026

📊 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 🥇 Nitro 0.039s (-24.0% 🟢) 1.005s (~) 0.966s 10 1.00x
💻 Local Express 0.041s (-3.7%) 1.005s (~) 0.964s 10 1.06x
💻 Local Next.js (Turbopack) 0.048s 1.005s 0.958s 10 1.22x
🌐 Redis Next.js (Turbopack) 0.055s 1.005s 0.950s 10 1.40x
🐘 Postgres Next.js (Turbopack) 0.058s 1.011s 0.953s 10 1.48x
🐘 Postgres Express 0.059s (-11.7% 🟢) 1.011s (~) 0.952s 10 1.50x
🐘 Postgres Nitro 0.062s (+7.1% 🔺) 1.011s (~) 0.949s 10 1.57x
🌐 MongoDB Next.js (Turbopack) 0.071s 1.007s 0.937s 10 1.80x

▲ Production (Vercel)

World Framework Workflow Time Wall Time Overhead Samples vs Fastest
▲ Vercel 🥇 Next.js (Turbopack) 0.520s (-18.9% 🟢) 2.559s (+4.8%) 2.038s 10 1.00x
▲ Vercel Express 0.529s (+6.7% 🔺) 2.725s (+7.5% 🔺) 2.196s 10 1.02x
▲ Vercel Nitro ⚠️ missing - - - -

🔍 Observability: Next.js (Turbopack) | Express

workflow with 1 step

💻 Local Development

World Framework Workflow Time Wall Time Overhead Samples vs Fastest
💻 Local 🥇 Nitro 1.121s (-1.9%) 2.006s (~) 0.886s 10 1.00x
💻 Local Next.js (Turbopack) 1.125s 2.005s 0.880s 10 1.00x
💻 Local Express 1.128s (-0.7%) 2.005s (~) 0.877s 10 1.01x
🌐 Redis Next.js (Turbopack) 1.136s 2.007s 0.870s 10 1.01x
🐘 Postgres Next.js (Turbopack) 1.137s 2.010s 0.874s 10 1.01x
🐘 Postgres Nitro 1.141s (-0.8%) 2.011s (~) 0.870s 10 1.02x
🐘 Postgres Express 1.144s (~) 2.009s (~) 0.865s 10 1.02x
🌐 MongoDB Next.js (Turbopack) 1.307s 2.008s 0.701s 10 1.17x

▲ Production (Vercel)

World Framework Workflow Time Wall Time Overhead Samples vs Fastest
▲ Vercel 🥇 Express 2.025s (-4.4%) 3.868s (~) 1.843s 10 1.00x
▲ Vercel Next.js (Turbopack) 2.225s (-1.9%) 3.810s (+6.3% 🔺) 1.585s 10 1.10x
▲ Vercel Nitro ⚠️ missing - - - -

🔍 Observability: Express | Next.js (Turbopack)

workflow with 10 sequential steps

💻 Local Development

World Framework Workflow Time Wall Time Overhead Samples vs Fastest
🌐 Redis 🥇 Next.js (Turbopack) 10.760s 11.023s 0.263s 3 1.00x
💻 Local Next.js (Turbopack) 10.830s 11.023s 0.193s 3 1.01x
🐘 Postgres Next.js (Turbopack) 10.849s 11.026s 0.177s 3 1.01x
💻 Local Nitro 10.868s (-1.3%) 11.023s (-2.9%) 0.155s 3 1.01x
🐘 Postgres Express 10.875s (~) 11.023s (~) 0.148s 3 1.01x
🐘 Postgres Nitro 10.925s (~) 11.022s (~) 0.096s 3 1.02x
💻 Local Express 10.940s (~) 11.023s (~) 0.083s 3 1.02x
🌐 MongoDB Next.js (Turbopack) 12.284s 13.024s 0.739s 3 1.14x

▲ Production (Vercel)

World Framework Workflow Time Wall Time Overhead Samples vs Fastest
▲ Vercel 🥇 Next.js (Turbopack) 16.974s (-7.5% 🟢) 18.994s (-5.5% 🟢) 2.020s 2 1.00x
▲ Vercel Express 17.301s (+0.8%) 19.105s (~) 1.804s 2 1.02x
▲ Vercel Nitro ⚠️ missing - - - -

🔍 Observability: Next.js (Turbopack) | Express

workflow with 25 sequential steps

💻 Local Development

World Framework Workflow Time Wall Time Overhead Samples vs Fastest
🌐 Redis 🥇 Next.js (Turbopack) 14.260s 15.028s 0.768s 4 1.00x
🐘 Postgres Next.js (Turbopack) 14.376s 15.024s 0.648s 4 1.01x
🐘 Postgres Express 14.550s (~) 15.024s (~) 0.474s 4 1.02x
🐘 Postgres Nitro 14.599s (+0.6%) 15.022s (~) 0.422s 4 1.02x
💻 Local Next.js (Turbopack) 14.643s 15.029s 0.386s 4 1.03x
💻 Local Nitro 14.843s (-2.4%) 15.029s (-6.3% 🟢) 0.186s 4 1.04x
💻 Local Express 14.935s (~) 15.029s (~) 0.094s 4 1.05x
🌐 MongoDB Next.js (Turbopack) 17.785s 18.028s 0.243s 4 1.25x

▲ Production (Vercel)

World Framework Workflow Time Wall Time Overhead Samples vs Fastest
▲ Vercel 🥇 Express 31.000s (-2.1%) 33.364s (~) 2.364s 2 1.00x
▲ Vercel Next.js (Turbopack) 31.658s (-6.2% 🟢) 33.906s (-4.1%) 2.248s 2 1.02x
▲ Vercel Nitro ⚠️ missing - - - -

🔍 Observability: Express | Next.js (Turbopack)

workflow with 50 sequential steps

💻 Local Development

World Framework Workflow Time Wall Time Overhead Samples vs Fastest
🌐 Redis 🥇 Next.js (Turbopack) 13.454s 14.025s 0.571s 7 1.00x
🐘 Postgres Next.js (Turbopack) 13.754s 14.025s 0.271s 7 1.02x
🐘 Postgres Express 13.824s (-1.4%) 14.025s (-3.0%) 0.201s 7 1.03x
🐘 Postgres Nitro 14.059s (~) 14.737s (+1.0%) 0.678s 7 1.04x
💻 Local Next.js (Turbopack) 16.125s 16.864s 0.739s 6 1.20x
💻 Local Nitro 16.221s (-5.5% 🟢) 17.031s (-5.6% 🟢) 0.809s 6 1.21x
💻 Local Express 16.371s (-1.9%) 17.030s (~) 0.659s 6 1.22x
🌐 MongoDB Next.js (Turbopack) 20.351s 21.027s 0.676s 5 1.51x

▲ Production (Vercel)

World Framework Workflow Time Wall Time Overhead Samples vs Fastest
▲ Vercel 🥇 Express 50.219s (-4.1%) 51.757s (-4.2%) 1.538s 2 1.00x
▲ Vercel Next.js (Turbopack) 55.358s (+1.7%) 57.109s (+3.0%) 1.751s 2 1.10x
▲ Vercel Nitro ⚠️ missing - - - -

🔍 Observability: Express | Next.js (Turbopack)

Promise.all with 10 concurrent steps

💻 Local Development

World Framework Workflow Time Wall Time Overhead Samples vs Fastest
🐘 Postgres 🥇 Next.js (Turbopack) 1.239s 2.011s 0.772s 15 1.00x
🌐 Redis Next.js (Turbopack) 1.261s 2.007s 0.746s 15 1.02x
🐘 Postgres Express 1.274s (~) 2.011s (~) 0.736s 15 1.03x
🐘 Postgres Nitro 1.279s (+1.5%) 2.011s (~) 0.732s 15 1.03x
💻 Local Express 1.471s (-4.6%) 2.005s (~) 0.535s 15 1.19x
💻 Local Next.js (Turbopack) 1.503s 2.005s 0.502s 15 1.21x
💻 Local Nitro 1.509s (-3.6%) 2.005s (~) 0.496s 15 1.22x
🌐 MongoDB Next.js (Turbopack) 2.747s 3.342s 0.595s 9 2.22x

▲ Production (Vercel)

World Framework Workflow Time Wall Time Overhead Samples vs Fastest
▲ Vercel 🥇 Express 2.551s (+8.0% 🔺) 4.049s (~) 1.498s 8 1.00x
▲ Vercel Next.js (Turbopack) 2.897s (+4.0%) 4.517s (+16.2% 🔺) 1.620s 7 1.14x
▲ Vercel Nitro ⚠️ missing - - - -

🔍 Observability: Express | Next.js (Turbopack)

Promise.all with 25 concurrent steps

💻 Local Development

World Framework Workflow Time Wall Time Overhead Samples vs Fastest
🐘 Postgres 🥇 Express 2.338s (~) 3.011s (~) 0.673s 10 1.00x
🐘 Postgres Nitro 2.350s (+1.1%) 3.012s (~) 0.661s 10 1.01x
🐘 Postgres Next.js (Turbopack) 2.389s 3.011s 0.621s 10 1.02x
🌐 Redis Next.js (Turbopack) 2.548s 3.008s 0.460s 10 1.09x
💻 Local Express 2.738s (-12.0% 🟢) 3.007s (-25.0% 🟢) 0.269s 10 1.17x
💻 Local Next.js (Turbopack) 2.758s 3.308s 0.551s 10 1.18x
💻 Local Nitro 2.949s (-5.5% 🟢) 3.107s (-20.0% 🟢) 0.159s 10 1.26x
🌐 MongoDB Next.js (Turbopack) 9.329s 9.764s 0.435s 4 3.99x

▲ Production (Vercel)

World Framework Workflow Time Wall Time Overhead Samples vs Fastest
▲ Vercel 🥇 Express 2.765s (-9.7% 🟢) 4.336s (-8.7% 🟢) 1.571s 7 1.00x
▲ Vercel Next.js (Turbopack) 3.153s (+1.4%) 4.775s (+5.4% 🔺) 1.622s 7 1.14x
▲ Vercel Nitro ⚠️ missing - - - -

🔍 Observability: Express | Next.js (Turbopack)

Promise.all with 50 concurrent steps

💻 Local Development

World Framework Workflow Time Wall Time Overhead Samples vs Fastest
🐘 Postgres 🥇 Express 3.468s (~) 4.011s (~) 0.543s 8 1.00x
🐘 Postgres Nitro 3.493s (+0.5%) 4.014s (~) 0.521s 8 1.01x
🐘 Postgres Next.js (Turbopack) 3.627s 4.013s 0.387s 8 1.05x
🌐 Redis Next.js (Turbopack) 4.054s 4.725s 0.672s 7 1.17x
💻 Local Express 7.587s (-6.9% 🟢) 8.019s (-11.1% 🟢) 0.432s 4 2.19x
💻 Local Next.js (Turbopack) 7.916s 8.268s 0.352s 4 2.28x
💻 Local Nitro 8.386s (~) 9.021s (~) 0.636s 4 2.42x
🌐 MongoDB Next.js (Turbopack) 20.425s 20.520s 0.095s 2 5.89x

▲ Production (Vercel)

World Framework Workflow Time Wall Time Overhead Samples vs Fastest
▲ Vercel 🥇 Express 3.353s (-12.7% 🟢) 5.142s (-7.0% 🟢) 1.789s 6 1.00x
▲ Vercel Next.js (Turbopack) 3.724s (-10.1% 🟢) 5.520s (-3.8%) 1.796s 6 1.11x
▲ Vercel Nitro ⚠️ missing - - - -

🔍 Observability: Express | Next.js (Turbopack)

Promise.race with 10 concurrent steps

💻 Local Development

World Framework Workflow Time Wall Time Overhead Samples vs Fastest
🐘 Postgres 🥇 Next.js (Turbopack) 1.226s 2.010s 0.785s 15 1.00x
🐘 Postgres Express 1.257s (~) 2.009s (~) 0.752s 15 1.03x
🐘 Postgres Nitro 1.277s (+1.5%) 2.010s (~) 0.732s 15 1.04x
🌐 Redis Next.js (Turbopack) 1.287s 2.006s 0.720s 15 1.05x
💻 Local Next.js (Turbopack) 1.478s 2.005s 0.527s 15 1.21x
💻 Local Nitro 1.513s (-3.4%) 2.006s (~) 0.493s 15 1.23x
💻 Local Express 1.579s (+2.3%) 2.073s (+3.3%) 0.494s 15 1.29x
🌐 MongoDB Next.js (Turbopack) 3.070s 3.758s 0.688s 8 2.50x

▲ Production (Vercel)

World Framework Workflow Time Wall Time Overhead Samples vs Fastest
▲ Vercel 🥇 Next.js (Turbopack) 2.263s (+0.8%) 4.117s (+14.4% 🔺) 1.854s 8 1.00x
▲ Vercel Express 2.633s (+6.8% 🔺) 4.511s (+9.1% 🔺) 1.878s 7 1.16x
▲ Vercel Nitro ⚠️ missing - - - -

🔍 Observability: Next.js (Turbopack) | Express

Promise.race with 25 concurrent steps

💻 Local Development

World Framework Workflow Time Wall Time Overhead Samples vs Fastest
🐘 Postgres 🥇 Express 2.314s (-1.2%) 3.011s (~) 0.696s 10 1.00x
🐘 Postgres Nitro 2.337s (+0.6%) 3.011s (~) 0.675s 10 1.01x
🐘 Postgres Next.js (Turbopack) 2.392s 3.009s 0.617s 10 1.03x
🌐 Redis Next.js (Turbopack) 2.672s 3.108s 0.436s 10 1.15x
💻 Local Express 2.801s (-9.9% 🟢) 3.009s (-22.6% 🟢) 0.207s 10 1.21x
💻 Local Nitro 2.880s (-10.4% 🟢) 3.008s (-22.6% 🟢) 0.127s 10 1.24x
💻 Local Next.js (Turbopack) 2.932s 3.760s 0.827s 8 1.27x
🌐 MongoDB Next.js (Turbopack) 9.511s 9.761s 0.250s 4 4.11x

▲ Production (Vercel)

World Framework Workflow Time Wall Time Overhead Samples vs Fastest
▲ Vercel 🥇 Next.js (Turbopack) 2.517s (-13.6% 🟢) 4.074s (+2.0%) 1.557s 8 1.00x
▲ Vercel Express 2.688s (+3.8%) 4.383s (+10.8% 🔺) 1.695s 8 1.07x
▲ Vercel Nitro ⚠️ missing - - - -

🔍 Observability: Next.js (Turbopack) | Express

Promise.race with 50 concurrent steps

💻 Local Development

World Framework Workflow Time Wall Time Overhead Samples vs Fastest
🐘 Postgres 🥇 Express 3.450s (-0.6%) 4.012s (~) 0.563s 8 1.00x
🐘 Postgres Nitro 3.492s (+0.9%) 4.012s (~) 0.520s 8 1.01x
🐘 Postgres Next.js (Turbopack) 3.636s 4.011s 0.375s 8 1.05x
🌐 Redis Next.js (Turbopack) 4.143s 4.726s 0.583s 7 1.20x
💻 Local Next.js (Turbopack) 8.165s 8.770s 0.606s 4 2.37x
💻 Local Express 8.399s (-6.7% 🟢) 9.022s (-5.3% 🟢) 0.623s 4 2.43x
💻 Local Nitro 8.796s (-1.7%) 9.272s (~) 0.475s 4 2.55x
🌐 MongoDB Next.js (Turbopack) 20.253s 20.520s 0.267s 2 5.87x

▲ Production (Vercel)

World Framework Workflow Time Wall Time Overhead Samples vs Fastest
▲ Vercel 🥇 Express 2.717s (-18.6% 🟢) 4.419s (-8.4% 🟢) 1.702s 7 1.00x
▲ Vercel Next.js (Turbopack) 3.590s (-2.4%) 5.375s (+4.8%) 1.786s 6 1.32x
▲ Vercel Nitro ⚠️ missing - - - -

🔍 Observability: Express | Next.js (Turbopack)

workflow with 10 sequential data payload steps (10KB)

💻 Local Development

World Framework Workflow Time Wall Time Overhead Samples vs Fastest
🌐 Redis 🥇 Next.js (Turbopack) 0.731s 1.021s 0.290s 59 1.00x
🐘 Postgres Next.js (Turbopack) 0.772s 1.007s 0.235s 60 1.06x
🐘 Postgres Express 0.812s (-4.7%) 1.007s (~) 0.195s 60 1.11x
🐘 Postgres Nitro 0.841s (+1.7%) 1.007s (~) 0.166s 60 1.15x
💻 Local Next.js (Turbopack) 0.847s 1.021s 0.174s 59 1.16x
💻 Local Nitro 0.928s (-9.6% 🟢) 1.021s (-46.6% 🟢) 0.094s 59 1.27x
💻 Local Express 1.022s (+2.4%) 1.654s (+16.2% 🔺) 0.631s 37 1.40x
🌐 MongoDB Next.js (Turbopack) 2.130s 3.007s 0.877s 20 2.91x

▲ Production (Vercel)

World Framework Workflow Time Wall Time Overhead Samples vs Fastest
▲ Vercel 🥇 Express 8.699s (-11.3% 🟢) 10.286s (-14.7% 🟢) 1.586s 6 1.00x
▲ Vercel Next.js (Turbopack) 9.419s (-8.1% 🟢) 11.291s (-4.8%) 1.872s 6 1.08x
▲ Vercel Nitro ⚠️ missing - - - -

🔍 Observability: Express | Next.js (Turbopack)

workflow with 25 sequential data payload steps (10KB)

💻 Local Development

World Framework Workflow Time Wall Time Overhead Samples vs Fastest
🌐 Redis 🥇 Next.js (Turbopack) 1.659s 2.006s 0.347s 45 1.00x
🐘 Postgres Next.js (Turbopack) 1.860s 2.053s 0.193s 44 1.12x
🐘 Postgres Express 1.971s (-2.6%) 2.316s (-13.8% 🟢) 0.345s 39 1.19x
🐘 Postgres Nitro 2.017s (+2.8%) 2.609s (+21.2% 🔺) 0.593s 35 1.22x
💻 Local Next.js (Turbopack) 2.691s 3.008s 0.318s 30 1.62x
💻 Local Nitro 2.854s (-7.6% 🟢) 3.007s (-25.0% 🟢) 0.153s 30 1.72x
💻 Local Express 3.012s (~) 3.609s (~) 0.597s 25 1.82x
🌐 MongoDB Next.js (Turbopack) 5.228s 6.012s 0.784s 15 3.15x

▲ Production (Vercel)

World Framework Workflow Time Wall Time Overhead Samples vs Fastest
▲ Vercel 🥇 Express 25.884s (-14.1% 🟢) 27.544s (-13.9% 🟢) 1.659s 4 1.00x
▲ Vercel Next.js (Turbopack) 27.479s (-8.6% 🟢) 29.379s (-7.2% 🟢) 1.900s 4 1.06x
▲ Vercel Nitro ⚠️ missing - - - -

🔍 Observability: Express | Next.js (Turbopack)

workflow with 50 sequential data payload steps (10KB)

💻 Local Development

World Framework Workflow Time Wall Time Overhead Samples vs Fastest
🌐 Redis 🥇 Next.js (Turbopack) 3.376s 4.009s 0.632s 30 1.00x
🐘 Postgres Next.js (Turbopack) 3.761s 4.010s 0.249s 30 1.11x
🐘 Postgres Express 3.948s (-2.7%) 4.149s (-13.2% 🟢) 0.201s 29 1.17x
🐘 Postgres Nitro 4.128s (+2.6%) 5.013s (+10.7% 🔺) 0.885s 24 1.22x
💻 Local Next.js (Turbopack) 8.634s 9.018s 0.384s 14 2.56x
💻 Local Nitro 8.829s (-6.2% 🟢) 9.159s (-8.6% 🟢) 0.330s 14 2.62x
💻 Local Express 8.917s (-2.5%) 9.247s (-4.0%) 0.331s 13 2.64x
🌐 MongoDB Next.js (Turbopack) 10.831s 11.201s 0.370s 11 3.21x

▲ Production (Vercel)

World Framework Workflow Time Wall Time Overhead Samples vs Fastest
▲ Vercel 🥇 Express 69.599s (-16.7% 🟢) 71.307s (-16.9% 🟢) 1.708s 2 1.00x
▲ Vercel Next.js (Turbopack) 74.469s (-11.0% 🟢) 76.541s (-10.9% 🟢) 2.072s 2 1.07x
▲ Vercel Nitro ⚠️ missing - - - -

🔍 Observability: Express | Next.js (Turbopack)

workflow with 10 concurrent data payload steps (10KB)

💻 Local Development

World Framework Workflow Time Wall Time Overhead Samples vs Fastest
🐘 Postgres 🥇 Next.js (Turbopack) 0.244s 1.008s 0.764s 60 1.00x
🐘 Postgres Express 0.281s (+0.8%) 1.008s (~) 0.727s 60 1.15x
🐘 Postgres Nitro 0.284s (+3.8%) 1.008s (~) 0.725s 60 1.16x
🌐 Redis Next.js (Turbopack) 0.306s 1.004s 0.698s 60 1.26x
💻 Local Next.js (Turbopack) 0.553s 1.004s 0.451s 60 2.27x
💻 Local Nitro 0.558s (-18.3% 🟢) 1.004s (-3.4%) 0.446s 60 2.29x
💻 Local Express 0.572s (-1.6%) 1.004s (~) 0.432s 60 2.35x
🌐 MongoDB Next.js (Turbopack) 3.377s 3.883s 0.506s 16 13.85x

▲ Production (Vercel)

World Framework Workflow Time Wall Time Overhead Samples vs Fastest
▲ Vercel 🥇 Express 1.828s (+15.9% 🔺) 3.553s (+14.5% 🔺) 1.725s 17 1.00x
▲ Vercel Next.js (Turbopack) 1.914s (-4.0%) 3.751s (-2.1%) 1.837s 17 1.05x
▲ Vercel Nitro ⚠️ missing - - - -

🔍 Observability: Express | Next.js (Turbopack)

workflow with 25 concurrent data payload steps (10KB)

💻 Local Development

World Framework Workflow Time Wall Time Overhead Samples vs Fastest
🐘 Postgres 🥇 Next.js (Turbopack) 0.480s 1.008s 0.527s 90 1.00x
🐘 Postgres Express 0.485s (-2.5%) 1.008s (~) 0.523s 90 1.01x
🐘 Postgres Nitro 0.494s (+1.0%) 1.008s (~) 0.514s 90 1.03x
🌐 Redis Next.js (Turbopack) 1.192s 2.006s 0.814s 45 2.48x
💻 Local Express 2.361s (-7.5% 🟢) 3.009s (~) 0.647s 30 4.91x
💻 Local Nitro 2.437s (-3.7%) 3.009s (~) 0.572s 30 5.07x
💻 Local Next.js (Turbopack) 2.577s 3.009s 0.432s 30 5.36x
🌐 MongoDB Next.js (Turbopack) 9.563s 10.011s 0.447s 9 19.91x

▲ Production (Vercel)

World Framework Workflow Time Wall Time Overhead Samples vs Fastest
▲ Vercel 🥇 Express 3.202s (-9.7% 🟢) 4.951s (-7.2% 🟢) 1.750s 19 1.00x
▲ Vercel Next.js (Turbopack) 3.457s (-23.8% 🟢) 5.425s (-11.2% 🟢) 1.967s 17 1.08x
▲ Vercel Nitro ⚠️ missing - - - -

🔍 Observability: Express | Next.js (Turbopack)

workflow with 50 concurrent data payload steps (10KB)

💻 Local Development

World Framework Workflow Time Wall Time Overhead Samples vs Fastest
🐘 Postgres 🥇 Next.js (Turbopack) 0.758s 1.007s 0.249s 120 1.00x
🐘 Postgres Express 0.773s (-2.4%) 1.008s (~) 0.235s 120 1.02x
🐘 Postgres Nitro 0.802s (+3.7%) 1.010s (~) 0.207s 119 1.06x
🌐 Redis Next.js (Turbopack) 2.733s 3.032s 0.299s 40 3.60x
💻 Local Express 10.406s (-7.1% 🟢) 11.026s (-7.6% 🟢) 0.619s 11 13.72x
💻 Local Nitro 10.696s (-5.8% 🟢) 11.118s (-6.9% 🟢) 0.422s 11 14.10x
💻 Local Next.js (Turbopack) 10.770s 11.389s 0.619s 11 14.20x
🌐 MongoDB Next.js (Turbopack) 19.706s 20.357s 0.651s 6 25.98x

▲ Production (Vercel)

World Framework Workflow Time Wall Time Overhead Samples vs Fastest
▲ Vercel 🥇 Express 6.924s (-16.1% 🟢) 8.750s (-10.6% 🟢) 1.826s 15 1.00x
▲ Vercel Next.js (Turbopack) 7.512s (-9.3% 🟢) 9.329s (-4.2%) 1.817s 13 1.08x
▲ Vercel Nitro ⚠️ missing - - - -

🔍 Observability: Express | 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
💻 Local 🥇 Next.js (Turbopack) 0.173s 1.002s 0.012s 1.018s 0.844s 10 1.00x
🌐 Redis Next.js (Turbopack) 0.176s 1.001s 0.002s 1.008s 0.832s 10 1.02x
💻 Local Nitro 0.193s (-11.5% 🟢) 1.003s (~) 0.012s (+6.3% 🔺) 1.017s (~) 0.825s 10 1.11x
🐘 Postgres Express 0.201s (-1.8%) 0.993s (~) 0.001s (-14.3% 🟢) 1.011s (~) 0.811s 10 1.16x
🐘 Postgres Next.js (Turbopack) 0.201s 1.000s 0.002s 1.011s 0.810s 10 1.16x
💻 Local Express 0.210s (+3.4%) 1.003s (~) 0.010s (-16.7% 🟢) 1.016s (~) 0.806s 10 1.21x
🐘 Postgres Nitro 0.215s (+2.8%) 0.997s (~) 0.001s (-6.7% 🟢) 1.011s (~) 0.796s 10 1.24x
🌐 MongoDB Next.js (Turbopack) 0.531s 0.923s 0.002s 1.009s 0.478s 10 3.06x

▲ Production (Vercel)

World Framework Workflow Time TTFB Slurp Wall Time Overhead Samples vs Fastest
▲ Vercel 🥇 Express 1.582s (-14.0% 🟢) 2.468s (-16.5% 🟢) 0.641s (+8.9% 🔺) 3.733s (-12.1% 🟢) 2.151s 10 1.00x
▲ Vercel Next.js (Turbopack) 2.240s (+11.9% 🔺) 3.444s (+15.5% 🔺) 0.371s (-44.8% 🟢) 4.561s (+8.7% 🔺) 2.321s 10 1.42x
▲ Vercel Nitro ⚠️ missing - - - - -

🔍 Observability: Express | Next.js (Turbopack)

stream pipeline with 5 transform steps (1MB)

💻 Local Development

World Framework Workflow Time TTFB Slurp Wall Time Overhead Samples vs Fastest
🌐 Redis 🥇 Next.js (Turbopack) 0.499s 1.001s 0.003s 1.011s 0.511s 60 1.00x
🐘 Postgres Next.js (Turbopack) 0.607s 1.008s 0.004s 1.022s 0.415s 59 1.22x
🐘 Postgres Express 0.609s (-1.2%) 1.001s (~) 0.006s (+46.3% 🔺) 1.024s (~) 0.415s 59 1.22x
🐘 Postgres Nitro 0.626s (+3.7%) 1.007s (~) 0.004s (-0.9%) 1.023s (~) 0.397s 59 1.25x
💻 Local Next.js (Turbopack) 0.665s 1.010s 0.010s 1.023s 0.358s 59 1.33x
💻 Local Nitro 0.690s (-9.3% 🟢) 1.009s (~) 0.008s (-15.4% 🟢) 1.020s (-0.6%) 0.331s 59 1.38x
💻 Local Express 0.749s (+3.5%) 1.010s (~) 0.009s (+6.1% 🔺) 1.023s (~) 0.273s 59 1.50x
🌐 MongoDB Next.js (Turbopack) 1.338s 1.949s 0.003s 2.013s 0.675s 30 2.68x

▲ Production (Vercel)

World Framework Workflow Time TTFB Slurp Wall Time Overhead Samples vs Fastest
▲ Vercel 🥇 Express 3.993s (-7.4% 🟢) 5.091s (-6.9% 🟢) 0.270s (+17.0% 🔺) 6.172s (-4.5%) 2.178s 10 1.00x
▲ Vercel Next.js (Turbopack) 6.878s (+17.0% 🔺) 7.938s (+14.5% 🔺) 0.203s (-52.1% 🟢) 9.163s (+15.6% 🔺) 2.285s 7 1.72x
▲ Vercel Nitro ⚠️ missing - - - - -

🔍 Observability: Express | Next.js (Turbopack)

10 parallel streams (1MB each)

💻 Local Development

World Framework Workflow Time TTFB Slurp Wall Time Overhead Samples vs Fastest
🌐 Redis 🥇 Next.js (Turbopack) 0.924s 1.034s 0.000s 1.039s 0.115s 58 1.00x
🐘 Postgres Express 0.929s (-4.9%) 1.146s (-4.3%) 0.000s (+Infinity% 🔺) 1.162s (-6.0% 🟢) 0.233s 52 1.01x
🐘 Postgres Next.js (Turbopack) 0.934s 1.251s 0.000s 1.259s 0.325s 48 1.01x
🐘 Postgres Nitro 0.955s (-2.1%) 1.247s (+7.1% 🔺) 0.000s (+8.3% 🔺) 1.259s (+6.1% 🔺) 0.304s 48 1.03x
💻 Local Nitro 1.175s (-9.3% 🟢) 2.018s (~) 0.000s (-45.5% 🟢) 2.020s (~) 0.846s 30 1.27x
💻 Local Express 1.216s (-2.5%) 2.020s (~) 0.000s (-25.0% 🟢) 2.022s (~) 0.806s 30 1.32x
💻 Local Next.js (Turbopack) 1.275s 2.020s 0.000s 2.024s 0.748s 30 1.38x
🌐 MongoDB Next.js (Turbopack) 2.358s 2.952s 0.000s 3.008s 0.649s 20 2.55x

▲ Production (Vercel)

World Framework Workflow Time TTFB Slurp Wall Time Overhead Samples vs Fastest
▲ Vercel 🥇 Next.js (Turbopack) 3.740s (+14.7% 🔺) 5.000s (+21.2% 🔺) 0.000s (+Infinity% 🔺) 5.799s (+23.8% 🔺) 2.059s 11 1.00x
▲ Vercel Express 4.490s (+49.5% 🔺) 5.519s (+34.7% 🔺) 0.000s (-100.0% 🟢) 6.208s (+28.9% 🔺) 1.718s 10 1.20x
▲ Vercel Nitro ⚠️ missing - - - - -

🔍 Observability: Next.js (Turbopack) | Express

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

💻 Local Development

World Framework Workflow Time TTFB Slurp Wall Time Overhead Samples vs Fastest
🌐 Redis 🥇 Next.js (Turbopack) 1.651s 2.033s 0.000s 2.040s 0.388s 30 1.00x
🐘 Postgres Express 1.714s (-2.0%) 2.131s (+3.1%) 0.000s (+Infinity% 🔺) 2.148s (+2.2%) 0.434s 29 1.04x
🐘 Postgres Next.js (Turbopack) 1.808s 2.146s 0.000s 2.154s 0.346s 28 1.09x
🐘 Postgres Nitro 1.854s (+8.1% 🔺) 2.134s (+1.7%) 0.000s (~) 2.169s (+2.7%) 0.315s 29 1.12x
💻 Local Express 3.379s (-6.7% 🟢) 4.033s (-1.6%) 0.000s (~) 4.036s (-1.6%) 0.657s 15 2.05x
💻 Local Nitro 3.384s (-9.4% 🟢) 3.968s (-6.3% 🟢) 0.000s (-57.4% 🟢) 3.972s (-6.3% 🟢) 0.588s 16 2.05x
💻 Local Next.js (Turbopack) 3.638s 4.166s 0.000s 4.170s 0.532s 15 2.20x
🌐 MongoDB Next.js (Turbopack) 4.399s 4.963s 0.000s 5.011s 0.612s 12 2.66x

▲ Production (Vercel)

World Framework Workflow Time TTFB Slurp Wall Time Overhead Samples vs Fastest
▲ Vercel 🥇 Express 3.511s (-6.1% 🟢) 4.660s (-7.4% 🟢) 0.007s (+1893.8% 🔺) 5.419s (-4.1%) 1.908s 12 1.00x
▲ Vercel Next.js (Turbopack) 4.269s (-19.0% 🟢) 5.436s (-12.6% 🟢) 0.000s (+Infinity% 🔺) 6.203s (-8.4% 🟢) 1.934s 10 1.22x
▲ Vercel Nitro ⚠️ missing - - - - -

🔍 Observability: Express | Next.js (Turbopack)

Summary

Fastest Framework by World

Winner determined by most benchmark wins

World 🥇 Fastest Framework Wins
💻 Local Next.js (Turbopack) 11/21
🐘 Postgres Next.js (Turbopack) 14/21
▲ Vercel Express 16/21
Fastest World by Framework

Winner determined by most benchmark wins

Framework 🥇 Fastest World Wins
Express 🐘 Postgres 17/21
Next.js (Turbopack) 🌐 Redis 9/21
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.

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github-actions bot commented Mar 27, 2026

🧪 E2E Test Results

Some tests failed

Summary

Passed Failed Skipped Total
❌ ▲ Vercel Production 867 1 67 935
✅ 💻 Local Development 842 0 178 1020
✅ 📦 Local Production 842 0 178 1020
✅ 🐘 Local Postgres 842 0 178 1020
✅ 🪟 Windows 77 0 8 85
❌ 🌍 Community Worlds 134 61 24 219
✅ 📋 Other 213 0 42 255
Total 3817 62 675 4554

❌ Failed Tests

▲ Vercel Production (1 failed)

nextjs-turbopack (1 failed):

🌍 Community Worlds (61 failed)

mongodb (3 failed):

  • hookWorkflow is not resumable via public webhook endpoint | wrun_01KNATQFNR5WNSBJYMEWCGKBKM
  • webhookWorkflow | wrun_01KNATQREVCSMW0TX1V8WGE560
  • concurrent hook token conflict - two workflows cannot use the same hook token simultaneously | wrun_01KNATZDVNTAJNEN6KKF1X61F5

redis (2 failed):

  • hookWorkflow is not resumable via public webhook endpoint | wrun_01KNATQFNR5WNSBJYMEWCGKBKM
  • concurrent hook token conflict - two workflows cannot use the same hook token simultaneously | wrun_01KNATZDVNTAJNEN6KKF1X61F5

turso (56 failed):

  • addTenWorkflow | wrun_01KNATP3RVMK23SGG03BGC6016
  • addTenWorkflow | wrun_01KNATP3RVMK23SGG03BGC6016
  • wellKnownAgentWorkflow (.well-known/agent) | wrun_01KNATPCCSZ0Y9EDCT62E4YPJW
  • should work with react rendering in step
  • promiseAllWorkflow | wrun_01KNATPAJWSTCQH06N0WG3XW6X
  • promiseRaceWorkflow | wrun_01KNATPHJNTZP797W8S52S1W9S
  • promiseAnyWorkflow | wrun_01KNATPKZHGR55CVCCP22RMTJA
  • importedStepOnlyWorkflow | wrun_01KNATPPZ3Q0T1S906GS40EKDE
  • hookWorkflow | wrun_01KNATQ470658GYN4S1A5KDZ71
  • hookWorkflow is not resumable via public webhook endpoint | wrun_01KNATQFNR5WNSBJYMEWCGKBKM
  • webhookWorkflow | wrun_01KNATQREVCSMW0TX1V8WGE560
  • sleepingWorkflow | wrun_01KNATQYPZ1AYVXCBB46Q07P3P
  • parallelSleepWorkflow | wrun_01KNATRB2FQW2DZ5KCJA67V81B
  • nullByteWorkflow | wrun_01KNATRFM4RSFFCFX3BG2KSEJB
  • workflowAndStepMetadataWorkflow | wrun_01KNATRHZ33AXHDPY39H0ENTP2
  • fetchWorkflow | wrun_01KNATV2TZR00CFEMTP5AZ03H8
  • promiseRaceStressTestWorkflow | wrun_01KNATV6EA31EGKBRVE06YKM2B
  • 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 retry behavior RetryableError respects custom retryAfter delay
  • error handling retry behavior maxRetries=0 disables retries
  • error handling catchability FatalError can be caught and detected with FatalError.is()
  • error handling not registered WorkflowNotRegisteredError fails the run when workflow does not exist
  • error handling not registered StepNotRegisteredError fails the step but workflow can catch it
  • error handling not registered StepNotRegisteredError fails the run when not caught in workflow
  • hookCleanupTestWorkflow - hook token reuse after workflow completion | wrun_01KNATYS3CAHW09DS04EKC7YRK
  • concurrent hook token conflict - two workflows cannot use the same hook token simultaneously | wrun_01KNATZDVNTAJNEN6KKF1X61F5
  • hookDisposeTestWorkflow - hook token reuse after explicit disposal while workflow still running | wrun_01KNAV03CBBAEW2NWVV18E2EPN
  • stepFunctionPassingWorkflow - step function references can be passed as arguments (without closure vars) | wrun_01KNAV0R1JWR2402AZTTX8XRF3
  • stepFunctionWithClosureWorkflow - step function with closure variables passed as argument | wrun_01KNAV129B10VP1FWRRV0MB7MD
  • closureVariableWorkflow - nested step functions with closure variables | wrun_01KNAV183GR6EXZNX1GBTAAX8N
  • spawnWorkflowFromStepWorkflow - spawning a child workflow using start() inside a step | wrun_01KNAV1AFN5DC0KMT1MFPZT1JT
  • health check (queue-based) - workflow and step endpoints respond to health check messages
  • pathsAliasWorkflow - TypeScript path aliases resolve correctly | wrun_01KNAV1TM5BA01X76SBPGMYZBE
  • Calculator.calculate - static workflow method using static step methods from another class | wrun_01KNAV20F6GD4573BDYBA3YM5M
  • AllInOneService.processNumber - static workflow method using sibling static step methods | wrun_01KNAV2779VS3AQ0BH93AYCT02
  • ChainableService.processWithThis - static step methods using this to reference the class | wrun_01KNAV2E94TJ6WVETF2XSDB8GD
  • thisSerializationWorkflow - step function invoked with .call() and .apply() | wrun_01KNAV2N4Z2ZHMNQV3Q856AJBY
  • customSerializationWorkflow - custom class serialization with WORKFLOW_SERIALIZE/WORKFLOW_DESERIALIZE | wrun_01KNAV2W1XAR9095EMZXPB3XEG
  • instanceMethodStepWorkflow - instance methods with "use step" directive | wrun_01KNAV32V04VEAE4T79HZ11Q9N
  • crossContextSerdeWorkflow - classes defined in step code are deserializable in workflow context | wrun_01KNAV3HAJACQDCCX2TCTJFT4H
  • stepFunctionAsStartArgWorkflow - step function reference passed as start() argument | wrun_01KNAV3SA5SC29E6Z3GG3XJ5MX
  • cancelRun - cancelling a running workflow | wrun_01KNAV40ANF611K09M8BTMK671
  • cancelRun via CLI - cancelling a running workflow | wrun_01KNAV49T0VMNW16AAFMS34MWX
  • pages router addTenWorkflow via pages router
  • pages router promiseAllWorkflow via pages router
  • pages router sleepingWorkflow via pages router
  • hookWithSleepWorkflow - hook payloads delivered correctly with concurrent sleep | wrun_01KNAV4PA1RFXG6VJ5CV0PAZ76
  • sleepInLoopWorkflow - sleep inside loop with steps actually delays each iteration | wrun_01KNAV5AX0ZKN8XA99YW7B874A
  • sleepWithSequentialStepsWorkflow - sequential steps work with concurrent sleep (control) | wrun_01KNAV5Q9226S6WN8EF6KFW3AG
  • importMetaUrlWorkflow - import.meta.url is available in step bundles | wrun_01KNAV5YADMWKFC14GACH2BAXT
  • metadataFromHelperWorkflow - getWorkflowMetadata/getStepMetadata work from module-level helper (#1577) | wrun_01KNAV60KNG2F9A2YS46KHGK5P

Details by Category

❌ ▲ Vercel Production
App Passed Failed Skipped
✅ astro 78 0 7
✅ example 78 0 7
✅ express 78 0 7
✅ fastify 78 0 7
✅ hono 78 0 7
❌ nextjs-turbopack 82 1 2
✅ nextjs-webpack 83 0 2
✅ nitro 78 0 7
✅ nuxt 78 0 7
✅ sveltekit 78 0 7
✅ vite 78 0 7
✅ 💻 Local Development
App Passed Failed Skipped
✅ astro-stable 71 0 14
✅ express-stable 71 0 14
✅ fastify-stable 71 0 14
✅ hono-stable 71 0 14
✅ nextjs-turbopack-canary 60 0 25
✅ nextjs-turbopack-stable 77 0 8
✅ nextjs-webpack-canary 60 0 25
✅ nextjs-webpack-stable 77 0 8
✅ nitro-stable 71 0 14
✅ nuxt-stable 71 0 14
✅ sveltekit-stable 71 0 14
✅ vite-stable 71 0 14
✅ 📦 Local Production
App Passed Failed Skipped
✅ astro-stable 71 0 14
✅ express-stable 71 0 14
✅ fastify-stable 71 0 14
✅ hono-stable 71 0 14
✅ nextjs-turbopack-canary 60 0 25
✅ nextjs-turbopack-stable 77 0 8
✅ nextjs-webpack-canary 60 0 25
✅ nextjs-webpack-stable 77 0 8
✅ nitro-stable 71 0 14
✅ nuxt-stable 71 0 14
✅ sveltekit-stable 71 0 14
✅ vite-stable 71 0 14
✅ 🐘 Local Postgres
App Passed Failed Skipped
✅ astro-stable 71 0 14
✅ express-stable 71 0 14
✅ fastify-stable 71 0 14
✅ hono-stable 71 0 14
✅ nextjs-turbopack-canary 60 0 25
✅ nextjs-turbopack-stable 77 0 8
✅ nextjs-webpack-canary 60 0 25
✅ nextjs-webpack-stable 77 0 8
✅ nitro-stable 71 0 14
✅ nuxt-stable 71 0 14
✅ sveltekit-stable 71 0 14
✅ vite-stable 71 0 14
✅ 🪟 Windows
App Passed Failed Skipped
✅ nextjs-turbopack 77 0 8
❌ 🌍 Community Worlds
App Passed Failed Skipped
✅ mongodb-dev 5 0 0
❌ mongodb 57 3 8
✅ redis-dev 5 0 0
❌ redis 58 2 8
✅ turso-dev 5 0 0
❌ turso 4 56 8
✅ 📋 Other
App Passed Failed Skipped
✅ e2e-local-dev-nest-stable 71 0 14
✅ e2e-local-postgres-nest-stable 71 0 14
✅ e2e-local-prod-nest-stable 71 0 14

📋 View full workflow run


Some E2E test jobs failed:

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

Check the workflow run for details.

Co-authored-by: Peter Wielander <mittgfu@gmail.com>
Signed-off-by: Peter Wielander <mittgfu@gmail.com>
@VaguelySerious VaguelySerious marked this pull request as ready for review April 3, 2026 23:20
@VaguelySerious VaguelySerious requested a review from a team as a code owner April 3, 2026 23:20
Signed-off-by: Peter Wielander <mittgfu@gmail.com>
Signed-off-by: Peter Wielander <mittgfu@gmail.com>
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STREAM_FLUSH_INTERVAL_MS should be configurable per-world

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