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[core] Make registeredSteps a global singleton to protect against module duplication#1606

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peter/step-registry
Apr 3, 2026
Merged

[core] Make registeredSteps a global singleton to protect against module duplication#1606
VaguelySerious merged 2 commits intomainfrom
peter/step-registry

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@VaguelySerious VaguelySerious commented Apr 3, 2026

Similar to #1591

Closes #1374
Closes #1373

@VaguelySerious
[core] Make registeredSteps a global singleton to protect against mod…
d35fea0 
…ule duplication

Signed-off-by: Peter Wielander <mittgfu@gmail.com>
@VaguelySerious VaguelySerious requested a review from a team as a code owner April 3, 2026 21:01
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🦋 Changeset detected

Latest commit: 48ca289

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

This PR includes changesets to release 16 packages
Name Type
@workflow/core Patch
@workflow/builders Patch
@workflow/cli Patch
@workflow/next Patch
@workflow/nitro Patch
@workflow/vitest Patch
@workflow/web-shared Patch
workflow Patch
@workflow/world-testing 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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🧪 E2E Test Results

❌ Some tests failed

Summary

Passed Failed Skipped Total
✅ ▲ Vercel Production 868 0 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 135 60 24 219
✅ 📋 Other 213 0 42 255
Total 3819 60 675 4554

❌ Failed Tests

🌍 Community Worlds (60 failed)

mongodb (2 failed):

  • hookWorkflow is not resumable via public webhook endpoint | wrun_01KNAMYAYZDSXS450SQQZXRV78
  • concurrent hook token conflict - two workflows cannot use the same hook token simultaneously | wrun_01KNAN6FBQR89PG3JGR9TBW0JW

redis (2 failed):

  • hookWorkflow is not resumable via public webhook endpoint | wrun_01KNAMYAYZDSXS450SQQZXRV78
  • concurrent hook token conflict - two workflows cannot use the same hook token simultaneously | wrun_01KNAN6FBQR89PG3JGR9TBW0JW

turso (56 failed):

  • addTenWorkflow | wrun_01KNAMX18R87XHRQTC9XFFZMCQ
  • addTenWorkflow | wrun_01KNAMX18R87XHRQTC9XFFZMCQ
  • wellKnownAgentWorkflow (.well-known/agent) | wrun_01KNAK08MMR4N52HCBFDQ08YE0
  • should work with react rendering in step
  • promiseAllWorkflow | wrun_01KNAMX83MK1R0J441157HW49C
  • promiseRaceWorkflow | wrun_01KNAMXEWN0G7ZBSS8QN9TNRJ7
  • promiseAnyWorkflow | wrun_01KNAMXH5DGS6RHR3E6VC9170B
  • importedStepOnlyWorkflow | wrun_01KNAK0NJP3WD3V01VZ212RY4X
  • hookWorkflow | wrun_01KNAMXXDYWM0NDQZKF8HVC62M
  • hookWorkflow is not resumable via public webhook endpoint | wrun_01KNAMYAYZDSXS450SQQZXRV78
  • webhookWorkflow | wrun_01KNAMYN86M29HYVM6SDMDN3NY
  • sleepingWorkflow | wrun_01KNAMYVR2NWDZCAHCM9AMKG7T
  • parallelSleepWorkflow | wrun_01KNAMZ7TQC1NGRSWAD2GPXTS7
  • nullByteWorkflow | wrun_01KNAMZB5YH8F7SWZFXVMFR10V
  • workflowAndStepMetadataWorkflow | wrun_01KNAMZDG90HVW33YPGHCZT4MD
  • fetchWorkflow | wrun_01KNAN26HPH0VNSF6ZQFNTMV95
  • promiseRaceStressTestWorkflow | wrun_01KNAN2A26YEE394X8F5GABAHS
  • 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_01KNAN5SDAM62EXMZKGFZV6CWB
  • concurrent hook token conflict - two workflows cannot use the same hook token simultaneously | wrun_01KNAN6FBQR89PG3JGR9TBW0JW
  • hookDisposeTestWorkflow - hook token reuse after explicit disposal while workflow still running | wrun_01KNAN753QGDG79ZMKRMRDE74T
  • stepFunctionPassingWorkflow - step function references can be passed as arguments (without closure vars) | wrun_01KNAN7SY0D19ZKJRNQ9WZTF1F
  • stepFunctionWithClosureWorkflow - step function with closure variables passed as argument | wrun_01KNAN82M5016JF0KGNHXCE6K9
  • closureVariableWorkflow - nested step functions with closure variables | wrun_01KNAN883PKT0F02SAA2K5E1B8
  • spawnWorkflowFromStepWorkflow - spawning a child workflow using start() inside a step | wrun_01KNAN8AE49X87BFNRWZ5B302G
  • health check (queue-based) - workflow and step endpoints respond to health check messages
  • pathsAliasWorkflow - TypeScript path aliases resolve correctly | wrun_01KNAN8V3W2H5EEYNKX45P3THH
  • Calculator.calculate - static workflow method using static step methods from another class | wrun_01KNAN90Q71Q06BZDZET7147JW
  • AllInOneService.processNumber - static workflow method using sibling static step methods | wrun_01KNAN98EEFAWH36WEHB6030RJ
  • ChainableService.processWithThis - static step methods using this to reference the class | wrun_01KNAN9JHQDEMR4T1T4CEBBZ5W
  • thisSerializationWorkflow - step function invoked with .call() and .apply() | wrun_01KNAN9TS8QM56TT7EZVAHK0JN
  • customSerializationWorkflow - custom class serialization with WORKFLOW_SERIALIZE/WORKFLOW_DESERIALIZE | wrun_01KNANA1E90S998DBY5379PZVW
  • instanceMethodStepWorkflow - instance methods with "use step" directive | wrun_01KNANA87D02JQCHPX4J23T1CX
  • crossContextSerdeWorkflow - classes defined in step code are deserializable in workflow context | wrun_01KNANAJTJJSEPS947BCZBJJ0S
  • stepFunctionAsStartArgWorkflow - step function reference passed as start() argument | wrun_01KNANAWBZ25V9CVBC6YPN4A3K
  • cancelRun - cancelling a running workflow | wrun_01KNANB35XPSDA1YBZDWE8PQ90
  • cancelRun via CLI - cancelling a running workflow | wrun_01KNANBCBRZK0H4XGQZM7MT5CS
  • 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_01KNANBRBQ5ED0NH9FCJQEPSG0
  • sleepInLoopWorkflow - sleep inside loop with steps actually delays each iteration | wrun_01KNANCCHQW8CWXZCAVXCM0VYV
  • sleepWithSequentialStepsWorkflow - sequential steps work with concurrent sleep (control) | wrun_01KNANCQ4HBKQMW20DSF6TH682
  • importMetaUrlWorkflow - import.meta.url is available in step bundles | wrun_01KNANCXWQ3S2SNXFRQX9C5MCY
  • metadataFromHelperWorkflow - getWorkflowMetadata/getStepMetadata work from module-level helper (#1577) | wrun_01KNAND0J8SCS30762CS1PK4PH

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 83 0 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 58 2 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

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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 🥇 Express 0.043s (-1.2%) 1.006s (~) 0.963s 10 1.00x
💻 Local Nitro 0.043s (-16.3% 🟢) 1.006s (~) 0.962s 10 1.02x
💻 Local Next.js (Turbopack) 0.045s 1.005s 0.959s 10 1.07x
🐘 Postgres Express 0.052s (-22.5% 🟢) 1.011s (~) 0.959s 10 1.21x
🌐 Redis Next.js (Turbopack) 0.057s 1.005s 0.948s 10 1.34x
🐘 Postgres Next.js (Turbopack) 0.057s 1.010s 0.953s 10 1.35x
🐘 Postgres Nitro 0.062s (+7.8% 🔺) 1.010s (~) 0.948s 10 1.46x
🌐 MongoDB Next.js (Turbopack) 0.138s 1.007s 0.869s 10 3.24x

▲ Production (Vercel)

World Framework Workflow Time Wall Time Overhead Samples vs Fastest
▲ Vercel 🥇 Next.js (Turbopack) 0.563s (-12.3% 🟢) 2.693s (+10.3% 🔺) 2.130s 10 1.00x
▲ Vercel Nitro 0.624s (+21.8% 🔺) 2.766s (-0.9%) 2.142s 10 1.11x
▲ Vercel Express ⚠️ missing - - - -

🔍 Observability: Next.js (Turbopack) | Nitro

workflow with 1 step

💻 Local Development

World Framework Workflow Time Wall Time Overhead Samples vs Fastest
💻 Local 🥇 Next.js (Turbopack) 1.099s 2.005s 0.906s 10 1.00x
🐘 Postgres Express 1.121s (-1.9%) 2.010s (~) 0.889s 10 1.02x
💻 Local Nitro 1.127s (-1.3%) 2.006s (~) 0.879s 10 1.03x
🌐 Redis Next.js (Turbopack) 1.129s 2.007s 0.877s 10 1.03x
💻 Local Express 1.133s (~) 2.007s (~) 0.874s 10 1.03x
🐘 Postgres Next.js (Turbopack) 1.134s 2.012s 0.879s 10 1.03x
🐘 Postgres Nitro 1.145s (~) 2.011s (~) 0.866s 10 1.04x
🌐 MongoDB Next.js (Turbopack) 1.298s 2.008s 0.710s 10 1.18x

▲ Production (Vercel)

World Framework Workflow Time Wall Time Overhead Samples vs Fastest
▲ Vercel 🥇 Next.js (Turbopack) 2.121s (-6.5% 🟢) 3.790s (+5.8% 🔺) 1.669s 10 1.00x
▲ Vercel Nitro 2.145s (+2.2%) 3.793s (-2.7%) 1.648s 10 1.01x
▲ Vercel Express ⚠️ missing - - - -

🔍 Observability: Next.js (Turbopack) | Nitro

workflow with 10 sequential steps

💻 Local Development

World Framework Workflow Time Wall Time Overhead Samples vs Fastest
💻 Local 🥇 Next.js (Turbopack) 10.626s 11.023s 0.397s 3 1.00x
🐘 Postgres Express 10.710s (-1.5%) 11.022s (~) 0.311s 3 1.01x
🌐 Redis Next.js (Turbopack) 10.810s 11.024s 0.214s 3 1.02x
🐘 Postgres Next.js (Turbopack) 10.879s 11.024s 0.144s 3 1.02x
🐘 Postgres Nitro 10.922s (~) 11.023s (~) 0.101s 3 1.03x
💻 Local Nitro 10.931s (-0.8%) 11.023s (-2.9%) 0.092s 3 1.03x
💻 Local Express 10.944s (~) 11.024s (~) 0.080s 3 1.03x
🌐 MongoDB Next.js (Turbopack) 12.251s 13.020s 0.769s 3 1.15x

▲ Production (Vercel)

World Framework Workflow Time Wall Time Overhead Samples vs Fastest
▲ Vercel 🥇 Nitro 17.020s (-7.9% 🟢) 18.460s (-8.8% 🟢) 1.440s 2 1.00x
▲ Vercel Next.js (Turbopack) 17.108s (-6.8% 🟢) 19.344s (-3.8%) 2.236s 2 1.01x
▲ Vercel Express ⚠️ missing - - - -

🔍 Observability: Nitro | Next.js (Turbopack)

workflow with 25 sequential steps

💻 Local Development

World Framework Workflow Time Wall Time Overhead Samples vs Fastest
🐘 Postgres 🥇 Express 14.166s (-3.1%) 15.022s (~) 0.856s 4 1.00x
💻 Local Next.js (Turbopack) 14.209s 15.030s 0.821s 4 1.00x
🌐 Redis Next.js (Turbopack) 14.304s 15.030s 0.726s 4 1.01x
🐘 Postgres Next.js (Turbopack) 14.460s 15.027s 0.567s 4 1.02x
🐘 Postgres Nitro 14.479s (~) 15.021s (~) 0.543s 4 1.02x
💻 Local Express 14.993s (~) 15.029s (~) 0.035s 4 1.06x
💻 Local Nitro 15.000s (-1.4%) 15.031s (-6.2% 🟢) 0.030s 4 1.06x
🌐 MongoDB Next.js (Turbopack) 17.782s 18.024s 0.242s 4 1.26x

▲ Production (Vercel)

World Framework Workflow Time Wall Time Overhead Samples vs Fastest
▲ Vercel 🥇 Nitro 31.381s (-10.2% 🟢) 32.739s (-11.6% 🟢) 1.357s 2 1.00x
▲ Vercel Next.js (Turbopack) 33.500s (-0.7%) 35.727s (+1.0%) 2.227s 2 1.07x
▲ Vercel Express ⚠️ missing - - - -

🔍 Observability: Nitro | Next.js (Turbopack)

workflow with 50 sequential steps

💻 Local Development

World Framework Workflow Time Wall Time Overhead Samples vs Fastest
🐘 Postgres 🥇 Express 13.089s (-6.7% 🟢) 13.886s (-3.9%) 0.797s 7 1.00x
🌐 Redis Next.js (Turbopack) 13.612s 14.170s 0.558s 7 1.04x
🐘 Postgres Next.js (Turbopack) 13.739s 14.026s 0.287s 7 1.05x
🐘 Postgres Nitro 13.885s (-0.9%) 14.305s (-2.0%) 0.420s 7 1.06x
💻 Local Next.js (Turbopack) 14.810s 15.026s 0.216s 6 1.13x
💻 Local Nitro 16.479s (-4.0%) 17.033s (-5.6% 🟢) 0.554s 6 1.26x
💻 Local Express 16.827s (+0.8%) 17.032s (~) 0.205s 6 1.29x
🌐 MongoDB Next.js (Turbopack) 20.308s 21.027s 0.719s 5 1.55x

▲ Production (Vercel)

World Framework Workflow Time Wall Time Overhead Samples vs Fastest
▲ Vercel 🥇 Nitro 51.428s (-8.9% 🟢) 53.197s (-9.1% 🟢) 1.770s 2 1.00x
▲ Vercel Next.js (Turbopack) 52.629s (-3.3%) 54.446s (-1.8%) 1.817s 2 1.02x
▲ Vercel Express ⚠️ missing - - - -

🔍 Observability: Nitro | Next.js (Turbopack)

Promise.all with 10 concurrent steps

💻 Local Development

World Framework Workflow Time Wall Time Overhead Samples vs Fastest
🐘 Postgres 🥇 Express 1.201s (-5.3% 🟢) 2.011s (~) 0.811s 15 1.00x
🐘 Postgres Next.js (Turbopack) 1.245s 2.011s 0.766s 15 1.04x
🐘 Postgres Nitro 1.278s (+1.4%) 2.011s (~) 0.733s 15 1.06x
🌐 Redis Next.js (Turbopack) 1.311s 2.007s 0.696s 15 1.09x
💻 Local Next.js (Turbopack) 1.519s 2.006s 0.487s 15 1.27x
💻 Local Nitro 1.525s (-2.7%) 2.006s (~) 0.481s 15 1.27x
💻 Local Express 1.525s (-1.1%) 2.006s (~) 0.481s 15 1.27x
🌐 MongoDB Next.js (Turbopack) 2.221s 3.009s 0.787s 10 1.85x

▲ Production (Vercel)

World Framework Workflow Time Wall Time Overhead Samples vs Fastest
▲ Vercel 🥇 Nitro 2.833s (+11.2% 🔺) 4.461s (+6.0% 🔺) 1.628s 7 1.00x
▲ Vercel Next.js (Turbopack) 3.014s (+8.2% 🔺) 4.377s (+12.6% 🔺) 1.363s 7 1.06x
▲ Vercel Express ⚠️ missing - - - -

🔍 Observability: Nitro | Next.js (Turbopack)

Promise.all with 25 concurrent steps

💻 Local Development

World Framework Workflow Time Wall Time Overhead Samples vs Fastest
🐘 Postgres 🥇 Express 2.289s (-2.3%) 3.011s (~) 0.722s 10 1.00x
🐘 Postgres Nitro 2.332s (~) 3.010s (~) 0.678s 10 1.02x
🐘 Postgres Next.js (Turbopack) 2.439s 3.011s 0.572s 10 1.07x
🌐 Redis Next.js (Turbopack) 2.579s 3.008s 0.429s 10 1.13x
💻 Local Next.js (Turbopack) 2.652s 3.008s 0.356s 10 1.16x
💻 Local Express 2.959s (-4.8%) 3.342s (-16.7% 🟢) 0.383s 9 1.29x
💻 Local Nitro 2.974s (-4.7%) 3.342s (-14.0% 🟢) 0.368s 9 1.30x
🌐 MongoDB Next.js (Turbopack) 9.336s 9.763s 0.427s 4 4.08x

▲ Production (Vercel)

World Framework Workflow Time Wall Time Overhead Samples vs Fastest
▲ Vercel 🥇 Next.js (Turbopack) 3.095s (~) 4.658s (+2.9%) 1.563s 7 1.00x
▲ Vercel Nitro 3.189s (+11.7% 🔺) 5.409s (+22.6% 🔺) 2.220s 6 1.03x
▲ Vercel Express ⚠️ missing - - - -

🔍 Observability: Next.js (Turbopack) | Nitro

Promise.all with 50 concurrent steps

💻 Local Development

World Framework Workflow Time Wall Time Overhead Samples vs Fastest
🐘 Postgres 🥇 Express 3.403s (-1.9%) 4.012s (~) 0.608s 8 1.00x
🐘 Postgres Nitro 3.473s (~) 4.010s (~) 0.536s 8 1.02x
🐘 Postgres Next.js (Turbopack) 3.661s 4.011s 0.350s 8 1.08x
🌐 Redis Next.js (Turbopack) 4.100s 4.868s 0.768s 7 1.20x
💻 Local Next.js (Turbopack) 6.643s 7.215s 0.571s 5 1.95x
💻 Local Nitro 7.260s (-13.4% 🟢) 8.022s (-11.1% 🟢) 0.762s 4 2.13x
💻 Local Express 8.486s (+4.1%) 9.032s (~) 0.546s 4 2.49x
🌐 MongoDB Next.js (Turbopack) 20.096s 20.520s 0.424s 2 5.90x

▲ Production (Vercel)

World Framework Workflow Time Wall Time Overhead Samples vs Fastest
▲ Vercel 🥇 Nitro 3.405s (-0.7%) 5.274s (+1.5%) 1.869s 6 1.00x
▲ Vercel Next.js (Turbopack) 13.094s (+216.2% 🔺) 15.679s (+173.2% 🔺) 2.585s 3 3.85x
▲ Vercel Express ⚠️ missing - - - -

🔍 Observability: Nitro | Next.js (Turbopack)

Promise.race with 10 concurrent steps

💻 Local Development

World Framework Workflow Time Wall Time Overhead Samples vs Fastest
🐘 Postgres 🥇 Express 1.193s (-5.6% 🟢) 2.010s (~) 0.817s 15 1.00x
🐘 Postgres Next.js (Turbopack) 1.241s 2.009s 0.768s 15 1.04x
🐘 Postgres Nitro 1.272s (+1.1%) 2.009s (~) 0.738s 15 1.07x
🌐 Redis Next.js (Turbopack) 1.311s 2.006s 0.695s 15 1.10x
💻 Local Next.js (Turbopack) 1.473s 2.005s 0.532s 15 1.23x
💻 Local Nitro 1.503s (-4.0%) 2.006s (~) 0.503s 15 1.26x
💻 Local Express 1.563s (+1.3%) 2.006s (~) 0.443s 15 1.31x
🌐 MongoDB Next.js (Turbopack) 3.122s 3.759s 0.638s 8 2.62x

▲ Production (Vercel)

World Framework Workflow Time Wall Time Overhead Samples vs Fastest
▲ Vercel 🥇 Next.js (Turbopack) 2.186s (-2.6%) 3.683s (+2.3%) 1.497s 9 1.00x
▲ Vercel Nitro 2.239s (-11.5% 🟢) 3.879s (-10.7% 🟢) 1.640s 8 1.02x
▲ Vercel Express ⚠️ missing - - - -

🔍 Observability: Next.js (Turbopack) | Nitro

Promise.race with 25 concurrent steps

💻 Local Development

World Framework Workflow Time Wall Time Overhead Samples vs Fastest
🐘 Postgres 🥇 Express 2.298s (-1.9%) 3.010s (~) 0.712s 10 1.00x
🐘 Postgres Nitro 2.336s (+0.5%) 3.011s (~) 0.675s 10 1.02x
🐘 Postgres Next.js (Turbopack) 2.399s 3.009s 0.609s 10 1.04x
🌐 Redis Next.js (Turbopack) 2.579s 3.008s 0.429s 10 1.12x
💻 Local Next.js (Turbopack) 2.847s 3.108s 0.261s 10 1.24x
💻 Local Express 3.027s (-2.7%) 3.886s (~) 0.859s 8 1.32x
💻 Local Nitro 3.067s (-4.6%) 3.564s (-8.3% 🟢) 0.497s 9 1.33x
🌐 MongoDB Next.js (Turbopack) 9.498s 9.769s 0.270s 4 4.13x

▲ Production (Vercel)

World Framework Workflow Time Wall Time Overhead Samples vs Fastest
▲ Vercel 🥇 Nitro 2.435s (-35.0% 🟢) 3.940s (-27.1% 🟢) 1.505s 8 1.00x
▲ Vercel Next.js (Turbopack) 2.894s (-0.7%) 4.333s (+8.5% 🔺) 1.439s 8 1.19x
▲ Vercel Express ⚠️ missing - - - -

🔍 Observability: Nitro | Next.js (Turbopack)

Promise.race with 50 concurrent steps

💻 Local Development

World Framework Workflow Time Wall Time Overhead Samples vs Fastest
🐘 Postgres 🥇 Express 3.392s (-2.2%) 4.011s (~) 0.619s 8 1.00x
🐘 Postgres Nitro 3.466s (~) 4.012s (~) 0.546s 8 1.02x
🐘 Postgres Next.js (Turbopack) 3.641s 4.012s 0.371s 8 1.07x
🌐 Redis Next.js (Turbopack) 4.135s 5.012s 0.877s 6 1.22x
💻 Local Next.js (Turbopack) 7.370s 8.016s 0.647s 4 2.17x
💻 Local Nitro 8.036s (-10.2% 🟢) 8.773s (-5.4% 🟢) 0.738s 4 2.37x
💻 Local Express 8.801s (-2.3%) 9.522s (~) 0.721s 4 2.59x
🌐 MongoDB Next.js (Turbopack) 20.072s 21.021s 0.949s 2 5.92x

▲ Production (Vercel)

World Framework Workflow Time Wall Time Overhead Samples vs Fastest
▲ Vercel 🥇 Nitro 3.089s (-3.8%) 5.187s (+5.5% 🔺) 2.097s 6 1.00x
▲ Vercel Next.js (Turbopack) 3.656s (-0.6%) 5.615s (+9.5% 🔺) 1.959s 6 1.18x
▲ Vercel Express ⚠️ missing - - - -

🔍 Observability: Nitro | 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 0.633s (-25.7% 🟢) 1.008s (~) 0.375s 60 1.00x
💻 Local Next.js (Turbopack) 0.678s 1.021s 0.343s 59 1.07x
🌐 Redis Next.js (Turbopack) 0.721s 1.004s 0.284s 60 1.14x
🐘 Postgres Next.js (Turbopack) 0.757s 1.007s 0.250s 60 1.20x
🐘 Postgres Nitro 0.812s (-1.7%) 1.007s (~) 0.194s 60 1.28x
💻 Local Express 1.000s (~) 1.281s (-10.0% 🟢) 0.282s 47 1.58x
💻 Local Nitro 1.019s (-0.6%) 1.720s (-10.1% 🟢) 0.701s 35 1.61x
🌐 MongoDB Next.js (Turbopack) 2.130s 3.007s 0.877s 20 3.37x

▲ Production (Vercel)

World Framework Workflow Time Wall Time Overhead Samples vs Fastest
▲ Vercel 🥇 Nitro 9.098s (-6.1% 🟢) 10.908s (-3.8%) 1.810s 6 1.00x
▲ Vercel Next.js (Turbopack) 9.333s (-8.9% 🟢) 10.995s (-7.3% 🟢) 1.662s 6 1.03x
▲ Vercel Express ⚠️ missing - - - -

🔍 Observability: Nitro | 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 1.525s (-24.6% 🟢) 2.009s (-25.2% 🟢) 0.483s 45 1.00x
🌐 Redis Next.js (Turbopack) 1.707s 2.006s 0.299s 45 1.12x
🐘 Postgres Next.js (Turbopack) 1.863s 2.053s 0.191s 44 1.22x
🐘 Postgres Nitro 1.911s (-2.6%) 2.076s (-3.5%) 0.165s 44 1.25x
💻 Local Next.js (Turbopack) 2.174s 3.008s 0.834s 30 1.43x
💻 Local Nitro 3.018s (-2.3%) 3.609s (-10.0% 🟢) 0.590s 25 1.98x
💻 Local Express 3.046s (+1.1%) 3.759s (+4.2%) 0.713s 24 2.00x
🌐 MongoDB Next.js (Turbopack) 5.268s 6.012s 0.744s 15 3.45x

▲ Production (Vercel)

World Framework Workflow Time Wall Time Overhead Samples vs Fastest
▲ Vercel 🥇 Nitro 28.832s (-4.7%) 30.759s (-3.7%) 1.927s 3 1.00x
▲ Vercel Next.js (Turbopack) 28.950s (-3.7%) 30.704s (-3.0%) 1.754s 4 1.00x
▲ Vercel Express ⚠️ missing - - - -

🔍 Observability: Nitro | 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 3.153s (-22.3% 🟢) 3.979s (-16.8% 🟢) 0.825s 31 1.00x
🌐 Redis Next.js (Turbopack) 3.455s 4.009s 0.553s 30 1.10x
🐘 Postgres Next.js (Turbopack) 3.796s 4.044s 0.248s 30 1.20x
🐘 Postgres Nitro 3.889s (-3.3%) 4.111s (-9.3% 🟢) 0.221s 30 1.23x
💻 Local Next.js (Turbopack) 7.194s 7.953s 0.759s 16 2.28x
💻 Local Nitro 8.941s (-5.0% 🟢) 9.325s (-6.9% 🟢) 0.384s 13 2.84x
💻 Local Express 9.262s (+1.3%) 10.019s (+4.0%) 0.757s 12 2.94x
🌐 MongoDB Next.js (Turbopack) 10.371s 11.018s 0.647s 11 3.29x

▲ Production (Vercel)

World Framework Workflow Time Wall Time Overhead Samples vs Fastest
▲ Vercel 🥇 Nitro 66.700s (-17.0% 🟢) 68.206s (-17.0% 🟢) 1.506s 2 1.00x
▲ Vercel Next.js (Turbopack) 74.779s (-10.6% 🟢) 77.020s (-10.4% 🟢) 2.241s 2 1.12x
▲ Vercel Express ⚠️ missing - - - -

🔍 Observability: Nitro | 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 0.247s (-11.2% 🟢) 1.008s (~) 0.761s 60 1.00x
🐘 Postgres Next.js (Turbopack) 0.257s 1.008s 0.751s 60 1.04x
🐘 Postgres Nitro 0.280s (+2.6%) 1.007s (~) 0.727s 60 1.13x
🌐 Redis Next.js (Turbopack) 0.327s 1.021s 0.695s 60 1.32x
💻 Local Nitro 0.562s (-17.6% 🟢) 1.004s (-3.4%) 0.442s 60 2.28x
💻 Local Next.js (Turbopack) 0.584s 1.021s 0.437s 59 2.36x
💻 Local Express 0.589s (+1.4%) 1.005s (~) 0.416s 60 2.38x
🌐 MongoDB Next.js (Turbopack) 3.127s 3.946s 0.820s 16 12.66x

▲ Production (Vercel)

World Framework Workflow Time Wall Time Overhead Samples vs Fastest
▲ Vercel 🥇 Nitro 1.754s (-0.7%) 3.491s (-7.0% 🟢) 1.738s 18 1.00x
▲ Vercel Next.js (Turbopack) 1.915s (-4.0%) 3.925s (+2.5%) 2.010s 16 1.09x
▲ Vercel Express ⚠️ missing - - - -

🔍 Observability: Nitro | 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 0.388s (-22.1% 🟢) 1.007s (~) 0.620s 90 1.00x
🐘 Postgres Next.js (Turbopack) 0.472s 1.007s 0.535s 90 1.22x
🐘 Postgres Nitro 0.494s (+1.0%) 1.007s (~) 0.513s 90 1.27x
🌐 Redis Next.js (Turbopack) 1.185s 2.006s 0.821s 45 3.06x
💻 Local Nitro 2.414s (-4.6%) 3.009s (~) 0.595s 30 6.23x
💻 Local Next.js (Turbopack) 2.484s 3.007s 0.523s 30 6.41x
💻 Local Express 2.587s (+1.4%) 3.009s (~) 0.422s 30 6.68x
🌐 MongoDB Next.js (Turbopack) 9.435s 10.015s 0.580s 9 24.34x

▲ Production (Vercel)

World Framework Workflow Time Wall Time Overhead Samples vs Fastest
▲ Vercel 🥇 Nitro 2.791s (-16.8% 🟢) 4.360s (-13.9% 🟢) 1.569s 21 1.00x
▲ Vercel Next.js (Turbopack) 3.660s (-19.4% 🟢) 5.338s (-12.6% 🟢) 1.678s 17 1.31x
▲ Vercel Express ⚠️ missing - - - -

🔍 Observability: Nitro | 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 0.585s (-26.1% 🟢) 1.008s (~) 0.423s 120 1.00x
🐘 Postgres Next.js (Turbopack) 0.760s 1.007s 0.247s 120 1.30x
🐘 Postgres Nitro 0.778s (+0.6%) 1.008s (~) 0.230s 120 1.33x
🌐 Redis Next.js (Turbopack) 2.788s 3.085s 0.297s 39 4.76x
💻 Local Next.js (Turbopack) 9.670s 10.275s 0.605s 12 16.52x
💻 Local Nitro 10.673s (-6.0% 🟢) 11.119s (-6.9% 🟢) 0.447s 11 18.24x
💻 Local Express 11.268s (+0.6%) 12.029s (+0.8%) 0.761s 10 19.26x
🌐 MongoDB Next.js (Turbopack) 19.922s 20.356s 0.435s 6 34.04x

▲ Production (Vercel)

World Framework Workflow Time Wall Time Overhead Samples vs Fastest
▲ Vercel 🥇 Nitro 7.360s (-19.7% 🟢) 9.080s (-16.3% 🟢) 1.719s 14 1.00x
▲ Vercel Next.js (Turbopack) 8.700s (+5.1% 🔺) 11.029s (+13.3% 🔺) 2.329s 11 1.18x
▲ Vercel Express ⚠️ missing - - - -

🔍 Observability: Nitro | 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) 0.136s 1.002s 0.009s 1.015s 0.879s 10 1.00x
🐘 Postgres Express 0.161s (-21.2% 🟢) 0.998s (~) 0.001s (-14.3% 🟢) 1.011s (~) 0.850s 10 1.18x
🌐 Redis Next.js (Turbopack) 0.186s 1.001s 0.002s 1.008s 0.822s 10 1.36x
🐘 Postgres Next.js (Turbopack) 0.198s 1.001s 0.001s 1.010s 0.812s 10 1.45x
🐘 Postgres Nitro 0.200s (-4.3%) 0.994s (~) 0.002s (~) 1.010s (~) 0.810s 10 1.47x
💻 Local Express 0.203s (~) 1.004s (~) 0.012s (-0.8%) 1.018s (~) 0.815s 10 1.49x
💻 Local Nitro 0.209s (-3.9%) 1.003s (~) 0.010s (-13.5% 🟢) 1.016s (~) 0.806s 10 1.54x
🌐 MongoDB Next.js (Turbopack) 0.486s 0.969s 0.002s 1.009s 0.523s 10 3.57x

▲ Production (Vercel)

World Framework Workflow Time TTFB Slurp Wall Time Overhead Samples vs Fastest
▲ Vercel 🥇 Nitro 1.689s (-5.2% 🟢) 2.873s (-1.5%) 0.387s (-27.6% 🟢) 3.853s (-6.5% 🟢) 2.164s 10 1.00x
▲ Vercel Next.js (Turbopack) 1.747s (-12.7% 🟢) 3.084s (+3.5%) 0.497s (-26.1% 🟢) 4.198s (~) 2.451s 10 1.03x
▲ Vercel Express ⚠️ missing - - - - -

🔍 Observability: Nitro | 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) 0.516s 1.000s 0.005s 1.014s 0.498s 60 1.00x
🐘 Postgres Express 0.545s (-11.5% 🟢) 1.005s (~) 0.002s (-44.6% 🟢) 1.021s (~) 0.476s 59 1.06x
💻 Local Next.js (Turbopack) 0.565s 1.009s 0.009s 1.021s 0.457s 59 1.09x
🐘 Postgres Nitro 0.596s (-1.4%) 1.002s (~) 0.004s (-0.9%) 1.023s (~) 0.428s 59 1.15x
🐘 Postgres Next.js (Turbopack) 0.613s 1.009s 0.007s 1.025s 0.413s 59 1.19x
💻 Local Express 0.733s (+1.3%) 1.010s (~) 0.009s (+6.9% 🔺) 1.023s (~) 0.290s 59 1.42x
💻 Local Nitro 0.756s (-0.6%) 1.010s (~) 0.009s (-9.1% 🟢) 1.023s (~) 0.267s 59 1.46x
🌐 MongoDB Next.js (Turbopack) 1.332s 1.950s 0.003s 2.013s 0.681s 30 2.58x

▲ Production (Vercel)

World Framework Workflow Time TTFB Slurp Wall Time Overhead Samples vs Fastest
▲ Vercel 🥇 Next.js (Turbopack) 4.556s (-22.5% 🟢) 6.280s (-9.4% 🟢) 0.319s (-24.9% 🟢) 7.215s (-9.0% 🟢) 2.659s 9 1.00x
▲ Vercel Nitro 4.702s (-11.6% 🟢) 6.362s (-3.8%) 0.350s (-39.8% 🟢) 7.330s (-6.7% 🟢) 2.628s 9 1.03x
▲ Vercel Express ⚠️ missing - - - - -

🔍 Observability: Next.js (Turbopack) | Nitro

10 parallel streams (1MB each)

💻 Local Development

World Framework Workflow Time TTFB Slurp Wall Time Overhead Samples vs Fastest
🐘 Postgres 🥇 Next.js (Turbopack) 0.916s 1.053s 0.000s 1.080s 0.163s 56 1.00x
🌐 Redis Next.js (Turbopack) 0.925s 1.034s 0.000s 1.039s 0.114s 58 1.01x
🐘 Postgres Nitro 0.963s (-1.3%) 1.162s (~) 0.000s (+47.2% 🔺) 1.178s (-0.8%) 0.216s 53 1.05x
🐘 Postgres Express 0.967s (-1.1%) 1.174s (-2.0%) 0.000s (+Infinity% 🔺) 1.186s (-4.1%) 0.219s 51 1.06x
💻 Local Next.js (Turbopack) 1.238s 2.018s 0.000s 2.022s 0.783s 30 1.35x
💻 Local Nitro 1.246s (-3.8%) 2.022s (~) 0.000s (-18.2% 🟢) 2.024s (~) 0.778s 30 1.36x
💻 Local Express 1.251s (~) 2.022s (~) 0.000s (-12.5% 🟢) 2.024s (~) 0.773s 30 1.37x
🌐 MongoDB Next.js (Turbopack) 2.365s 2.957s 0.000s 3.008s 0.644s 20 2.58x

▲ Production (Vercel)

World Framework Workflow Time TTFB Slurp Wall Time Overhead Samples vs Fastest
▲ Vercel 🥇 Nitro 3.327s (+15.4% 🔺) 4.071s (+2.6%) 0.000s (-100.0% 🟢) 4.892s (+5.8% 🔺) 1.565s 13 1.00x
▲ Vercel Next.js (Turbopack) 3.364s (+3.2%) 4.461s (+8.2% 🔺) 0.000s (+Infinity% 🔺) 5.084s (+8.5% 🔺) 1.720s 12 1.01x
▲ Vercel Express ⚠️ missing - - - - -

🔍 Observability: Nitro | 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
🌐 Redis 🥇 Next.js (Turbopack) 1.642s 2.035s 0.000s 2.040s 0.398s 30 1.00x
🐘 Postgres Nitro 1.722s (~) 2.139s (+1.9%) 0.000s (+107.1% 🔺) 2.153s (+1.9%) 0.431s 28 1.05x
🐘 Postgres Express 1.774s (+1.4%) 2.215s (+7.2% 🔺) 0.000s (+Infinity% 🔺) 2.225s (+5.8% 🔺) 0.451s 28 1.08x
🐘 Postgres Next.js (Turbopack) 1.825s 2.103s 0.000s 2.150s 0.325s 28 1.11x
💻 Local Express 3.500s (-3.4%) 4.032s (-1.6%) 0.001s (+14.3% 🔺) 4.036s (-1.6%) 0.536s 15 2.13x
💻 Local Nitro 3.577s (-4.2%) 4.167s (-1.6%) 0.000s (-36.4% 🟢) 4.171s (-1.6%) 0.594s 15 2.18x
💻 Local Next.js (Turbopack) 3.825s 4.297s 0.000s 4.301s 0.476s 15 2.33x
🌐 MongoDB Next.js (Turbopack) 4.399s 4.959s 0.000s 5.010s 0.611s 12 2.68x

▲ Production (Vercel)

World Framework Workflow Time TTFB Slurp Wall Time Overhead Samples vs Fastest
▲ Vercel 🥇 Nitro 3.600s (-13.8% 🟢) 4.755s (-11.5% 🟢) 0.000s (+Infinity% 🔺) 5.384s (-10.7% 🟢) 1.784s 12 1.00x
▲ Vercel Next.js (Turbopack) 54.899s (+941.7% 🔺) 56.139s (+802.2% 🔺) 0.000s (+Infinity% 🔺) 56.883s (+740.3% 🔺) 1.984s 6 15.25x
▲ Vercel Express ⚠️ missing - - - - -

🔍 Observability: Nitro | Next.js (Turbopack)

Summary

Fastest Framework by World

Winner determined by most benchmark wins

World 🥇 Fastest Framework Wins
💻 Local Next.js (Turbopack) 17/21
🐘 Postgres Express 19/21
▲ Vercel Nitro 16/21
Fastest World by Framework

Winner determined by most benchmark wins

Framework 🥇 Fastest World Wins
Express 🐘 Postgres 20/21
Next.js (Turbopack) 🐘 Postgres 10/21
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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Additional Suggestion:

Incomplete rename of BUILTIN_RESPONSE_STEP_NAMES to BUILTIN_STEP_NAMES leaves a stale reference on line 73, causing TypeScript compilation errors TS6133 and TS2552 that break all builds.

Fix on Vercel

@vercel @VaguelySerious
Fix: Incomplete rename of BUILTIN_RESPONSE_STEP_NAMES to `BUILTIN_S…
48ca289 
…TEP_NAMES` leaves a stale reference on line 73, causing TypeScript compilation errors TS6133 and TS2552 that break all builds.

This commit fixes the issue reported at packages/core/src/private.ts:73

**Bug:** The constant `BUILTIN_RESPONSE_STEP_NAMES` was renamed to `BUILTIN_STEP_NAMES` on line 30 of `packages/core/src/private.ts`, but the reference to it in `getBuiltinResponseStepAlias` on line 73 was not updated. This causes two TypeScript errors:
- TS6133: `BUILTIN_STEP_NAMES` is declared but never read (since nothing references the new name)
- TS2552: Cannot find name `BUILTIN_RESPONSE_STEP_NAMES` (since the old name no longer exists)

This is confirmed by the Vercel build log at lines 1136-1137, which shows these exact errors from the `@workflow/core:build` step. All 13 Vercel deployments fail because of this.

**Fix:** Changed the reference on line 73 from `BUILTIN_RESPONSE_STEP_NAMES` to `BUILTIN_STEP_NAMES`, completing the rename that was started on line 30.

Co-authored-by: Vercel <vercel[bot]@users.noreply.github.com>
Co-authored-by: VaguelySerious <mittgfu@gmail.com>
@VaguelySerious VaguelySerious enabled auto-merge (squash) April 3, 2026 21:44
@VaguelySerious VaguelySerious merged commit ab872cc into main Apr 3, 2026
165 of 168 checks passed
@VaguelySerious VaguelySerious deleted the peter/step-registry branch April 3, 2026 21:53
VaguelySerious added a commit that referenced this pull request Apr 3, 2026
@VaguelySerious @claude
fix: restore registeredSteps global singleton from #1606
146052b 
The merge from main lost the Symbol.for-based global singleton for
registeredSteps (from #1606). Without it, Vite dev mode creates separate
module instances of private.ts, causing step registrations to land in one
Map while the step handler reads from another — resulting in 30-minute
timeouts on sveltekit and astro e2e suites.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
This was referenced Apr 6, 2026
Merged
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Successfully merging this pull request may close these issues.

Step functions not found when using Turbopack dev mode with non-local world backends

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@VaguelySerious @TooTallNate