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[world-vercel] Vary ref resolution concurrency based on header#1220

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[world-vercel] Vary ref resolution concurrency based on header#1220
VaguelySerious merged 1 commit into
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peter/vary-ref-concurrency

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@VaguelySerious VaguelySerious commented Feb 27, 2026

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[world-vercel] Vary ref resolution concurrency based on header
a7e82ca 
Signed-off-by: Peter Wielander <mittgfu@gmail.com>
@VaguelySerious VaguelySerious requested a review from a team as a code owner February 27, 2026 19:12
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changeset-bot Bot commented Feb 27, 2026

🦋 Changeset detected

Latest commit: a7e82ca

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

This PR includes changesets to release 15 packages
Name Type
@workflow/world-vercel Patch
@workflow/cli Patch
@workflow/core Patch
workflow Patch
@workflow/world-testing Patch
@workflow/builders Patch
@workflow/next Patch
@workflow/nitro Patch
@workflow/web-shared 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

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github-actions Bot commented Feb 27, 2026 •
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🧪 E2E Test Results

❌ Some tests failed

Summary

Passed Failed Skipped Total
✅ ▲ Vercel Production 523 0 49 572
✅ 💻 Local Development 556 0 68 624
✅ 📦 Local Production 556 0 68 624
❌ 🐘 Local Postgres 554 2 68 624
✅ 🪟 Windows 49 0 3 52
❌ 🌍 Community Worlds 111 45 9 165
✅ 📋 Other 135 0 21 156
Total 2484 47 286 2817

❌ Failed Tests

🐘 Local Postgres (2 failed)

express-stable (1 failed):

  • webhookWorkflow

nextjs-webpack-stable (1 failed):

  • webhookWorkflow
🌍 Community Worlds (45 failed)

turso (45 failed):

  • addTenWorkflow
  • addTenWorkflow
  • should work with react rendering in step
  • promiseAllWorkflow
  • promiseRaceWorkflow
  • promiseAnyWorkflow
  • hookWorkflow
  • webhookWorkflow
  • sleepingWorkflow
  • parallelSleepWorkflow
  • nullByteWorkflow
  • workflowAndStepMetadataWorkflow
  • fetchWorkflow
  • promiseRaceStressTestWorkflow
  • 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 retry behavior workflow completes despite transient 5xx on step_completed
  • error handling catchability FatalError can be caught and detected with FatalError.is()
  • hookCleanupTestWorkflow - hook token reuse after workflow completion
  • concurrent hook token conflict - two workflows cannot use the same hook token simultaneously
  • stepFunctionPassingWorkflow - step function references can be passed as arguments (without closure vars)
  • stepFunctionWithClosureWorkflow - step function with closure variables passed as argument
  • closureVariableWorkflow - nested step functions with closure variables
  • spawnWorkflowFromStepWorkflow - spawning a child workflow using start() inside a step
  • health check (queue-based) - workflow and step endpoints respond to health check messages
  • pathsAliasWorkflow - TypeScript path aliases resolve correctly
  • Calculator.calculate - static workflow method using static step methods from another class
  • AllInOneService.processNumber - static workflow method using sibling static step methods
  • ChainableService.processWithThis - static step methods using this to reference the class
  • thisSerializationWorkflow - step function invoked with .call() and .apply()
  • customSerializationWorkflow - custom class serialization with WORKFLOW_SERIALIZE/WORKFLOW_DESERIALIZE
  • instanceMethodStepWorkflow - instance methods with "use step" directive
  • crossContextSerdeWorkflow - classes defined in step code are deserializable in workflow context
  • stepFunctionAsStartArgWorkflow - step function reference passed as start() argument
  • cancelRun - cancelling a running workflow
  • cancelRun via CLI - cancelling a running workflow
  • pages router addTenWorkflow via pages router
  • pages router promiseAllWorkflow via pages router
  • pages router sleepingWorkflow via pages router

Details by Category

✅ ▲ Vercel Production
App Passed Failed Skipped
✅ astro 47 0 5
✅ example 47 0 5
✅ express 47 0 5
✅ fastify 47 0 5
✅ hono 47 0 5
✅ nextjs-turbopack 50 0 2
✅ nextjs-webpack 50 0 2
✅ nitro 47 0 5
✅ nuxt 47 0 5
✅ sveltekit 47 0 5
✅ vite 47 0 5
✅ 💻 Local Development
App Passed Failed Skipped
✅ astro-stable 45 0 7
✅ express-stable 45 0 7
✅ fastify-stable 45 0 7
✅ hono-stable 45 0 7
✅ nextjs-turbopack-canary 49 0 3
✅ nextjs-turbopack-stable 49 0 3
✅ nextjs-webpack-canary 49 0 3
✅ nextjs-webpack-stable 49 0 3
✅ nitro-stable 45 0 7
✅ nuxt-stable 45 0 7
✅ sveltekit-stable 45 0 7
✅ vite-stable 45 0 7
✅ 📦 Local Production
App Passed Failed Skipped
✅ astro-stable 45 0 7
✅ express-stable 45 0 7
✅ fastify-stable 45 0 7
✅ hono-stable 45 0 7
✅ nextjs-turbopack-canary 49 0 3
✅ nextjs-turbopack-stable 49 0 3
✅ nextjs-webpack-canary 49 0 3
✅ nextjs-webpack-stable 49 0 3
✅ nitro-stable 45 0 7
✅ nuxt-stable 45 0 7
✅ sveltekit-stable 45 0 7
✅ vite-stable 45 0 7
❌ 🐘 Local Postgres
App Passed Failed Skipped
✅ astro-stable 45 0 7
❌ express-stable 44 1 7
✅ fastify-stable 45 0 7
✅ hono-stable 45 0 7
✅ nextjs-turbopack-canary 49 0 3
✅ nextjs-turbopack-stable 49 0 3
✅ nextjs-webpack-canary 49 0 3
❌ nextjs-webpack-stable 48 1 3
✅ nitro-stable 45 0 7
✅ nuxt-stable 45 0 7
✅ sveltekit-stable 45 0 7
✅ vite-stable 45 0 7
✅ 🪟 Windows
App Passed Failed Skipped
✅ nextjs-turbopack 49 0 3
❌ 🌍 Community Worlds
App Passed Failed Skipped
✅ mongodb-dev 3 0 0
✅ mongodb 49 0 3
✅ redis-dev 3 0 0
✅ redis 49 0 3
✅ turso-dev 3 0 0
❌ turso 4 45 3
✅ 📋 Other
App Passed Failed Skipped
✅ e2e-local-dev-nest-stable 45 0 7
✅ e2e-local-postgres-nest-stable 45 0 7
✅ e2e-local-prod-nest-stable 45 0 7

📋 View full workflow run

❌ Some E2E test jobs failed:

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

Check the workflow run for details.

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📊 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 0.032s (-2.4%) 1.005s (~) 0.973s 10 1.00x
💻 Local Express 0.033s (~) 1.005s (~) 0.972s 10 1.03x
💻 Local Next.js (Turbopack) 0.041s (+9.0% 🔺) 1.005s (~) 0.964s 10 1.28x
🌐 Redis Next.js (Turbopack) 0.044s (-4.8%) 1.005s (~) 0.961s 10 1.36x
🐘 Postgres Nitro 0.057s (-5.0%) 1.014s (~) 0.957s 10 1.78x
🐘 Postgres Express 0.062s (+11.0% 🔺) 1.012s (~) 0.951s 10 1.92x
🌐 MongoDB Next.js (Turbopack) 0.087s (-8.0% 🟢) 1.008s (~) 0.920s 10 2.72x
🐘 Postgres Next.js (Turbopack) ⚠️ missing - - - -

▲ Production (Vercel)

World Framework Workflow Time Wall Time Overhead Samples vs Fastest
▲ Vercel 🥇 Next.js (Turbopack) 0.575s (-33.5% 🟢) 2.108s (-13.1% 🟢) 1.533s 10 1.00x
▲ Vercel Express 0.586s (+18.1% 🔺) 2.087s (-1.3%) 1.502s 10 1.02x
▲ Vercel Nitro 0.617s (+22.1% 🔺) 2.121s (+4.5%) 1.505s 10 1.07x

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

workflow with 1 step

💻 Local Development

World Framework Workflow Time Wall Time Overhead Samples vs Fastest
💻 Local 🥇 Next.js (Turbopack) 1.096s (~) 2.006s (~) 0.910s 10 1.00x
💻 Local Express 1.107s (~) 2.007s (~) 0.899s 10 1.01x
💻 Local Nitro 1.108s (~) 2.006s (~) 0.898s 10 1.01x
🌐 Redis Next.js (Turbopack) 1.111s (~) 2.006s (~) 0.896s 10 1.01x
🐘 Postgres Nitro 1.117s (-1.6%) 2.011s (~) 0.894s 10 1.02x
🐘 Postgres Express 1.149s (+2.3%) 2.014s (~) 0.865s 10 1.05x
🌐 MongoDB Next.js (Turbopack) 1.310s (-0.5%) 2.008s (~) 0.698s 10 1.20x
🐘 Postgres Next.js (Turbopack) ⚠️ missing - - - -

▲ Production (Vercel)

World Framework Workflow Time Wall Time Overhead Samples vs Fastest
▲ Vercel 🥇 Next.js (Turbopack) 2.123s (+2.8%) 3.592s (+10.9% 🔺) 1.469s 10 1.00x
▲ Vercel Nitro 2.239s (+11.5% 🔺) 3.255s (-2.0%) 1.016s 10 1.05x
▲ Vercel Express 2.269s (+13.1% 🔺) 3.478s (+6.0% 🔺) 1.209s 10 1.07x

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

workflow with 10 sequential steps

💻 Local Development

World Framework Workflow Time Wall Time Overhead Samples vs Fastest
💻 Local 🥇 Next.js (Turbopack) 10.722s (~) 11.022s (~) 0.300s 3 1.00x
🌐 Redis Next.js (Turbopack) 10.738s (~) 11.022s (~) 0.284s 3 1.00x
🐘 Postgres Nitro 10.844s (~) 11.036s (~) 0.192s 3 1.01x
💻 Local Nitro 10.845s (~) 11.022s (~) 0.176s 3 1.01x
💻 Local Express 10.847s (~) 11.022s (~) 0.175s 3 1.01x
🐘 Postgres Express 10.945s (~) 11.048s (~) 0.103s 3 1.02x
🌐 MongoDB Next.js (Turbopack) 12.281s (~) 13.022s (~) 0.741s 3 1.15x
🐘 Postgres Next.js (Turbopack) ⚠️ missing - - - -

▲ Production (Vercel)

World Framework Workflow Time Wall Time Overhead Samples vs Fastest
▲ Vercel 🥇 Nitro 17.772s (+5.8% 🔺) 19.005s (+6.0% 🔺) 1.233s 2 1.00x
▲ Vercel Express 17.863s (+6.6% 🔺) 19.422s (+8.2% 🔺) 1.559s 2 1.01x
▲ Vercel Next.js (Turbopack) 19.710s (+13.9% 🔺) 21.020s (+14.5% 🔺) 1.310s 2 1.11x

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

workflow with 25 sequential steps

💻 Local Development

World Framework Workflow Time Wall Time Overhead Samples vs Fastest
🌐 Redis 🥇 Next.js (Turbopack) 26.900s (~) 27.052s (~) 0.152s 3 1.00x
🐘 Postgres Nitro 27.270s (~) 28.060s (~) 0.790s 3 1.01x
💻 Local Next.js (Turbopack) 27.276s (~) 28.050s (~) 0.775s 3 1.01x
🐘 Postgres Express 27.489s (+0.5%) 28.069s (~) 0.580s 3 1.02x
💻 Local Nitro 27.577s (~) 28.052s (~) 0.475s 3 1.03x
💻 Local Express 27.592s (~) 28.054s (~) 0.463s 3 1.03x
🌐 MongoDB Next.js (Turbopack) 30.579s (~) 31.049s (~) 0.470s 2 1.14x
🐘 Postgres Next.js (Turbopack) ⚠️ missing - - - -

▲ Production (Vercel)

World Framework Workflow Time Wall Time Overhead Samples vs Fastest
▲ Vercel 🥇 Express 43.513s (-13.6% 🟢) 45.030s (-13.0% 🟢) 1.517s 2 1.00x
▲ Vercel Nitro 45.672s (-8.5% 🟢) 46.695s (-8.7% 🟢) 1.023s 2 1.05x
▲ Vercel Next.js (Turbopack) 46.086s (-1.1%) 47.525s (~) 1.439s 2 1.06x

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

workflow with 50 sequential steps

💻 Local Development

World Framework Workflow Time Wall Time Overhead Samples vs Fastest
🌐 Redis 🥇 Next.js (Turbopack) 54.361s (~) 55.100s (~) 0.739s 2 1.00x
🐘 Postgres Nitro 55.073s (~) 55.591s (~) 0.518s 2 1.01x
🐘 Postgres Express 55.478s (+0.6%) 56.112s (~) 0.634s 2 1.02x
💻 Local Next.js (Turbopack) 56.844s (~) 57.098s (~) 0.254s 2 1.05x
💻 Local Nitro 57.623s (+0.6%) 58.107s (~) 0.484s 2 1.06x
💻 Local Express 57.649s (~) 58.106s (~) 0.457s 2 1.06x
🌐 MongoDB Next.js (Turbopack) 61.065s (~) 61.574s (-0.8%) 0.510s 2 1.12x
🐘 Postgres Next.js (Turbopack) ⚠️ missing - - - -

▲ Production (Vercel)

World Framework Workflow Time Wall Time Overhead Samples vs Fastest
▲ Vercel 🥇 Express 100.799s (-1.1%) 102.233s (-0.5%) 1.434s 1 1.00x
▲ Vercel Next.js (Turbopack) 104.121s (+3.6%) 104.950s (+3.6%) 0.829s 1 1.03x
▲ Vercel Nitro 107.253s (+10.3% 🔺) 107.731s (+9.8% 🔺) 0.478s 1 1.06x

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

Promise.all with 10 concurrent steps

💻 Local Development

World Framework Workflow Time Wall Time Overhead Samples vs Fastest
🌐 Redis 🥇 Next.js (Turbopack) 1.268s (-1.1%) 2.006s (~) 0.738s 15 1.00x
🐘 Postgres Nitro 1.353s (-2.4%) 2.010s (~) 0.658s 15 1.07x
🐘 Postgres Express 1.386s (+1.1%) 2.011s (~) 0.625s 15 1.09x
💻 Local Next.js (Turbopack) 1.415s (~) 2.004s (~) 0.589s 15 1.12x
💻 Local Nitro 1.417s (~) 2.006s (~) 0.589s 15 1.12x
💻 Local Express 1.427s (+0.7%) 2.006s (~) 0.579s 15 1.13x
🌐 MongoDB Next.js (Turbopack) 2.175s (+0.9%) 3.008s (~) 0.833s 10 1.72x
🐘 Postgres Next.js (Turbopack) ⚠️ missing - - - -

▲ Production (Vercel)

World Framework Workflow Time Wall Time Overhead Samples vs Fastest
▲ Vercel 🥇 Express 2.368s (-21.9% 🟢) 3.767s (-9.0% 🟢) 1.399s 8 1.00x
▲ Vercel Nitro 2.497s (~) 3.571s (-4.6%) 1.074s 9 1.05x
▲ Vercel Next.js (Turbopack) 3.763s (+33.1% 🔺) 5.043s (+26.9% 🔺) 1.280s 6 1.59x

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

Promise.all with 25 concurrent steps

💻 Local Development

World Framework Workflow Time Wall Time Overhead Samples vs Fastest
🐘 Postgres 🥇 Express 2.031s (~) 2.689s (+3.5%) 0.658s 12 1.00x
🐘 Postgres Nitro 2.137s (+3.8%) 2.684s (+3.4%) 0.547s 12 1.05x
💻 Local Next.js (Turbopack) 2.477s (-0.9%) 3.006s (~) 0.529s 10 1.22x
🌐 Redis Next.js (Turbopack) 2.501s (~) 3.007s (~) 0.507s 10 1.23x
💻 Local Nitro 2.673s (+1.9%) 3.007s (~) 0.335s 10 1.32x
💻 Local Express 2.677s (+0.9%) 3.007s (~) 0.331s 10 1.32x
🌐 MongoDB Next.js (Turbopack) 4.777s (+0.9%) 5.176s (~) 0.399s 6 2.35x
🐘 Postgres Next.js (Turbopack) ⚠️ missing - - - -

▲ Production (Vercel)

World Framework Workflow Time Wall Time Overhead Samples vs Fastest
▲ Vercel 🥇 Nitro 2.734s (-27.9% 🟢) 3.685s (-26.8% 🟢) 0.951s 9 1.00x
▲ Vercel Express 2.766s (-13.6% 🟢) 3.813s (-11.8% 🟢) 1.047s 8 1.01x
▲ Vercel Next.js (Turbopack) 3.509s (+3.5%) 4.514s (-1.3%) 1.006s 7 1.28x

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

Promise.all with 50 concurrent steps

💻 Local Development

World Framework Workflow Time Wall Time Overhead Samples vs Fastest
🐘 Postgres 🥇 Express 3.636s (-5.1% 🟢) 4.308s (-3.4%) 0.672s 7 1.00x
🐘 Postgres Nitro 3.925s (+16.1% 🔺) 4.593s (+10.8% 🔺) 0.668s 7 1.08x
🌐 Redis Next.js (Turbopack) 4.021s (-2.3%) 4.724s (~) 0.703s 7 1.11x
💻 Local Next.js (Turbopack) 6.886s (+2.8%) 7.416s (+2.8%) 0.530s 5 1.89x
💻 Local Nitro 7.702s (+5.6% 🔺) 8.018s (~) 0.317s 4 2.12x
💻 Local Express 7.890s (+4.3%) 8.269s (+3.1%) 0.379s 4 2.17x
🌐 MongoDB Next.js (Turbopack) 10.015s (+2.2%) 10.350s (~) 0.335s 3 2.75x
🐘 Postgres Next.js (Turbopack) ⚠️ missing - - - -

▲ Production (Vercel)

World Framework Workflow Time Wall Time Overhead Samples vs Fastest
▲ Vercel 🥇 Nitro 2.867s (-1.2%) 3.586s (-6.6% 🟢) 0.718s 9 1.00x
▲ Vercel Express 3.274s (+5.5% 🔺) 4.321s (+3.6%) 1.047s 8 1.14x
▲ Vercel Next.js (Turbopack) 3.444s (-4.0%) 4.381s (-7.5% 🟢) 0.937s 7 1.20x

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

Promise.race with 10 concurrent steps

💻 Local Development

World Framework Workflow Time Wall Time Overhead Samples vs Fastest
🌐 Redis 🥇 Next.js (Turbopack) 1.249s (-1.7%) 2.006s (~) 0.757s 15 1.00x
🐘 Postgres Express 1.364s (~) 2.011s (~) 0.647s 15 1.09x
🐘 Postgres Nitro 1.404s (+3.4%) 2.010s (~) 0.606s 15 1.12x
💻 Local Next.js (Turbopack) 1.418s (-2.1%) 2.005s (~) 0.586s 15 1.14x
💻 Local Nitro 1.438s (~) 2.006s (~) 0.568s 15 1.15x
💻 Local Express 1.464s (+1.2%) 2.005s (~) 0.541s 15 1.17x
🌐 MongoDB Next.js (Turbopack) 2.191s (+2.0%) 3.007s (~) 0.816s 10 1.75x
🐘 Postgres Next.js (Turbopack) ⚠️ missing - - - -

▲ Production (Vercel)

World Framework Workflow Time Wall Time Overhead Samples vs Fastest
▲ Vercel 🥇 Nitro 2.244s (-4.2%) 3.379s (-2.4%) 1.135s 9 1.00x
▲ Vercel Express 2.255s (-14.1% 🟢) 3.561s (-6.0% 🟢) 1.306s 9 1.00x
▲ Vercel Next.js (Turbopack) 2.374s (-0.6%) 3.405s (-2.7%) 1.032s 9 1.06x

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

Promise.race with 25 concurrent steps

💻 Local Development

World Framework Workflow Time Wall Time Overhead Samples vs Fastest
🐘 Postgres 🥇 Nitro 1.990s (-7.4% 🟢) 2.598s (-3.1%) 0.607s 12 1.00x
🐘 Postgres Express 2.015s (-2.4%) 2.516s (-8.2% 🟢) 0.501s 12 1.01x
🌐 Redis Next.js (Turbopack) 2.489s (-1.9%) 3.008s (~) 0.519s 10 1.25x
💻 Local Next.js (Turbopack) 2.612s (+1.3%) 3.009s (~) 0.396s 10 1.31x
💻 Local Express 2.811s (~) 3.008s (-3.2%) 0.197s 10 1.41x
💻 Local Nitro 2.816s (+3.2%) 3.010s (~) 0.194s 10 1.41x
🌐 MongoDB Next.js (Turbopack) 4.726s (~) 5.176s (~) 0.450s 6 2.37x
🐘 Postgres Next.js (Turbopack) ⚠️ missing - - - -

▲ Production (Vercel)

World Framework Workflow Time Wall Time Overhead Samples vs Fastest
▲ Vercel 🥇 Express 2.477s (-8.2% 🟢) 3.701s (+3.6%) 1.224s 9 1.00x
▲ Vercel Nitro 2.563s (-1.0%) 3.724s (+3.3%) 1.161s 9 1.03x
▲ Vercel Next.js (Turbopack) 2.817s (-1.9%) 4.077s (+6.5% 🔺) 1.260s 8 1.14x

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

Promise.race with 50 concurrent steps

💻 Local Development

World Framework Workflow Time Wall Time Overhead Samples vs Fastest
🌐 Redis 🥇 Next.js (Turbopack) 4.052s (-1.7%) 5.011s (+6.1% 🔺) 0.959s 6 1.00x
🐘 Postgres Express 4.116s (-1.7%) 4.749s (~) 0.633s 7 1.02x
🐘 Postgres Nitro 4.256s (+16.0% 🔺) 4.885s (+13.4% 🔺) 0.629s 7 1.05x
💻 Local Next.js (Turbopack) 7.769s (+12.2% 🔺) 8.264s (+10.0% 🔺) 0.495s 4 1.92x
💻 Local Express 8.568s (+2.4%) 9.022s (~) 0.454s 4 2.11x
💻 Local Nitro 8.679s (+8.3% 🔺) 9.272s (+8.8% 🔺) 0.593s 4 2.14x
🌐 MongoDB Next.js (Turbopack) 9.768s (~) 10.348s (~) 0.580s 3 2.41x
🐘 Postgres Next.js (Turbopack) ⚠️ missing - - - -

▲ Production (Vercel)

World Framework Workflow Time Wall Time Overhead Samples vs Fastest
▲ Vercel 🥇 Next.js (Turbopack) 2.981s (-11.8% 🟢) 3.912s (-12.7% 🟢) 0.932s 8 1.00x
▲ Vercel Nitro 3.055s (-7.8% 🟢) 3.899s (-16.5% 🟢) 0.844s 8 1.02x
▲ Vercel Express 3.327s (+4.9%) 4.314s (-11.0% 🟢) 0.987s 7 1.12x

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

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) 0.144s (-0.7%) 1.001s (~) 0.011s (+4.6%) 1.016s (~) 0.872s 10 1.00x
🌐 Redis Next.js (Turbopack) 0.151s (-2.0%) 1.000s (~) 0.002s (~) 1.007s (~) 0.856s 10 1.05x
💻 Local Nitro 0.175s (-0.7%) 1.003s (~) 0.012s (+5.4% 🔺) 1.018s (~) 0.843s 10 1.21x
💻 Local Express 0.182s (+3.7%) 1.003s (~) 0.012s (+5.4% 🔺) 1.017s (~) 0.836s 10 1.26x
🐘 Postgres Nitro 0.189s (-3.2%) 0.990s (~) 0.001s (-12.5% 🟢) 1.012s (~) 0.823s 10 1.31x
🐘 Postgres Express 0.215s (+7.4% 🔺) 0.993s (~) 0.002s (-5.9% 🟢) 1.014s (~) 0.799s 10 1.49x
🌐 MongoDB Next.js (Turbopack) 0.505s (+0.8%) 0.942s (~) 0.002s (+6.2% 🔺) 1.009s (~) 0.503s 10 3.51x
🐘 Postgres Next.js (Turbopack) ⚠️ missing - - - - -

▲ Production (Vercel)

World Framework Workflow Time TTFB Slurp Wall Time Overhead Samples vs Fastest
▲ Vercel 🥇 Nitro 1.751s (+3.6%) 2.570s (+11.0% 🔺) 0.089s (-32.4% 🟢) 3.113s (+6.4% 🔺) 1.362s 10 1.00x
▲ Vercel Express 1.769s (-6.1% 🟢) 2.423s (-0.5%) 0.119s (-4.2%) 3.086s (-2.2%) 1.317s 10 1.01x
▲ Vercel Next.js (Turbopack) 1.831s (+3.0%) 2.750s (+13.8% 🔺) 0.103s (-30.5% 🟢) 3.368s (+10.1% 🔺) 1.538s 10 1.05x

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

Summary

Fastest Framework by World

Winner determined by most benchmark wins

World 🥇 Fastest Framework Wins
💻 Local Next.js (Turbopack) 11/12
🐘 Postgres Nitro 8/12
▲ Vercel Nitro 5/12
Fastest World by Framework

Winner determined by most benchmark wins

Framework 🥇 Fastest World Wins
Express 🐘 Postgres 6/12
Next.js (Turbopack) 💻 Local 5/12
Nitro 🐘 Postgres 7/12
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

@VaguelySerious VaguelySerious merged commit 274ea8b into main Feb 27, 2026
96 of 98 checks passed
@VaguelySerious VaguelySerious deleted the peter/vary-ref-concurrency branch February 27, 2026 19:23
@vercel-release-bot vercel-release-bot mentioned this pull request Feb 27, 2026
Merged
This was referenced Feb 27, 2026
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