docs: add AI generation pipelines guide by johnlindquist · Pull Request #1108 · vercel/workflow

johnlindquist · 2026-02-18T17:54:40Z

Summary

Adds generation pipelines guide to the AI Agents documentation section
Covers batch content generation, image/media generation, multi-stage pipelines, fan-out patterns, progress streaming, and AI error handling
Motivated by usage data: 155 teams using AI/ML workflows but docs only cover chat-based agents

Test plan

Verify MDX renders correctly
Verify code examples are syntactically valid (all 7 code samples pass pnpm test:docs)
Verify meta.json navigation works
Link validation passes (bun run lint:links - 0 errors)

changeset-bot · 2026-02-18T17:54:44Z

⚠️ No Changeset found

Latest commit: 021f818

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vercel · 2026-02-18T17:54:45Z

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

Project	Deployment	Actions	Updated (UTC)
example-nextjs-workflow-turbopack	Ready	Preview, Comment, Open in v0	Feb 19, 2026 6:32pm
example-nextjs-workflow-webpack	Ready	Preview, Comment, Open in v0	Feb 19, 2026 6:32pm
example-workflow	Ready	Preview, Comment, Open in v0	Feb 19, 2026 6:32pm
workbench-astro-workflow	Ready	Preview, Comment, Open in v0	Feb 19, 2026 6:32pm
workbench-express-workflow	Ready	Preview, Comment, Open in v0	Feb 19, 2026 6:32pm
workbench-fastify-workflow	Ready	Preview, Comment, Open in v0	Feb 19, 2026 6:32pm
workbench-hono-workflow	Ready	Preview, Comment, Open in v0	Feb 19, 2026 6:32pm
workbench-nitro-workflow	Ready	Preview, Comment, Open in v0	Feb 19, 2026 6:32pm
workbench-nuxt-workflow	Ready	Preview, Comment, Open in v0	Feb 19, 2026 6:32pm
workbench-sveltekit-workflow	Ready	Preview, Comment, Open in v0	Feb 19, 2026 6:32pm
workbench-vite-workflow	Ready	Preview, Comment, Open in v0	Feb 19, 2026 6:32pm
workflow-docs	Ready	Preview, 💬 6 unresolved, Open in v0	Feb 19, 2026 6:32pm
workflow-nest	Ready	Preview, Comment, Open in v0	Feb 19, 2026 6:32pm
workflow-swc-playground	Ready	Preview, Comment, Open in v0	Feb 19, 2026 6:32pm

github-actions · 2026-02-18T17:54:50Z

🧪 E2E Test Results

❌ Some tests failed

Summary

	Passed	Failed	Skipped	Total
❌ ▲ Vercel Production	533	1	38	572
✅ 💻 Local Development	556	0	68	624
✅ 📦 Local Production	556	0	68	624
✅ 🐘 Local Postgres	556	0	68	624
✅ 🪟 Windows	49	0	3	52
❌ 🌍 Community Worlds	110	46	9	165
✅ 📋 Other	135	0	21	156
Total	2495	47	275	2817

❌ Failed Tests

▲ Vercel Production (1 failed)

nitro (1 failed):

promiseAnyWorkflow

🌍 Community Worlds (46 failed)

mongodb (1 failed):

webhookWorkflow

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	48	0	4
✅ example	48	0	4
✅ express	48	0	4
✅ fastify	48	0	4
✅ hono	48	0	4
✅ nextjs-turbopack	51	0	1
✅ nextjs-webpack	51	0	1
❌ nitro	47	1	4
✅ nuxt	48	0	4
✅ sveltekit	48	0	4
✅ vite	48	0	4

✅ 💻 Local Development

App	Passed	Skipped
✅ astro-stable	45	7
✅ express-stable	45	7
✅ fastify-stable	45	7
✅ hono-stable	45	7
✅ nextjs-turbopack-canary	49	3
✅ nextjs-turbopack-stable	49	3
✅ nextjs-webpack-canary	49	3
✅ nextjs-webpack-stable	49	3
✅ nitro-stable	45	7
✅ nuxt-stable	45	7
✅ sveltekit-stable	45	7
✅ vite-stable	45	7

✅ 📦 Local Production

App	Passed	Skipped
✅ astro-stable	45	7
✅ express-stable	45	7
✅ fastify-stable	45	7
✅ hono-stable	45	7
✅ nextjs-turbopack-canary	49	3
✅ nextjs-turbopack-stable	49	3
✅ nextjs-webpack-canary	49	3
✅ nextjs-webpack-stable	49	3
✅ nitro-stable	45	7
✅ nuxt-stable	45	7
✅ sveltekit-stable	45	7
✅ vite-stable	45	7

✅ 🐘 Local Postgres

App	Passed	Skipped
✅ astro-stable	45	7
✅ express-stable	45	7
✅ fastify-stable	45	7
✅ hono-stable	45	7
✅ nextjs-turbopack-canary	49	3
✅ nextjs-turbopack-stable	49	3
✅ nextjs-webpack-canary	49	3
✅ nextjs-webpack-stable	49	3
✅ nitro-stable	45	7
✅ nuxt-stable	45	7
✅ sveltekit-stable	45	7
✅ vite-stable	45	7

✅ 🪟 Windows

App	Passed	Failed	Skipped
✅ nextjs-turbopack	49	0	3

❌ 🌍 Community Worlds

App	Passed	Failed	Skipped
✅ mongodb-dev	3	0	0
❌ mongodb	48	1	3
✅ redis-dev	3	0	0
✅ redis	49	0	3
✅ turso-dev	3	0	0
❌ turso	4	45	3

✅ 📋 Other

App	Passed	Skipped
✅ e2e-local-dev-nest-stable	45	7
✅ e2e-local-postgres-nest-stable	45	7
✅ e2e-local-prod-nest-stable	45	7

📋 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.

github-actions · 2026-02-18T17:54:53Z

📊 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	0.033s (-2.4%)	1.006s (~)	0.973s	10	1.00x
💻 Local	Express	0.035s (+8.3% 🔺)	1.005s (~)	0.970s	10	1.07x
🐘 Postgres	Nitro	0.111s (-76.7% 🟢)	1.010s (~)	0.899s	10	3.38x
🐘 Postgres	Express	0.129s (+25.1% 🔺)	1.009s (~)	0.880s	10	3.93x
💻 Local	Next.js (Turbopack)	⚠️ missing	-	-	-	-
🐘 Postgres	Next.js (Turbopack)	⚠️ missing	-	-	-	-

▲ Production (Vercel)

World	Framework	Workflow Time	Wall Time	Overhead	Samples	vs Fastest
▲ Vercel	🥇 Express	0.578s (-16.3% 🟢)	1.911s (-8.0% 🟢)	1.334s	10	1.00x
▲ Vercel	Nitro	0.608s (-42.9% 🟢)	1.948s (-21.5% 🟢)	1.340s	10	1.05x
▲ Vercel	Next.js (Turbopack)	0.641s (-21.2% 🟢)	1.934s (-6.4% 🟢)	1.294s	10	1.11x

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

workflow with 1 step

💻 Local Development

World	Framework	Workflow Time	Wall Time	Overhead	Samples	vs Fastest
💻 Local	🥇 Nitro	1.105s (~)	2.006s (~)	0.901s	10	1.00x
💻 Local	Express	1.106s (~)	2.006s (~)	0.900s	10	1.00x
🐘 Postgres	Nitro	1.990s (-15.2% 🟢)	2.412s (-20.0% 🟢)	0.422s	10	1.80x
🐘 Postgres	Express	2.208s (-10.9% 🟢)	2.614s (-13.3% 🟢)	0.405s	10	2.00x
💻 Local	Next.js (Turbopack)	⚠️ missing	-	-	-	-
🐘 Postgres	Next.js (Turbopack)	⚠️ missing	-	-	-	-

▲ Production (Vercel)

World	Framework	Workflow Time	Wall Time	Overhead	Samples	vs Fastest
▲ Vercel	🥇 Nitro	2.249s (-1.9%)	3.001s (-4.4%)	0.752s	10	1.00x
▲ Vercel	Next.js (Turbopack)	2.277s (+1.3%)	3.189s (+2.7%)	0.912s	10	1.01x
▲ Vercel	Express	2.302s (+5.5% 🔺)	3.183s (+0.9%)	0.881s	10	1.02x

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

workflow with 10 sequential steps

💻 Local Development

World	Framework	Workflow Time	Wall Time	Overhead	Samples	vs Fastest
💻 Local	🥇 Nitro	10.832s (~)	11.023s (~)	0.191s	3	1.00x
💻 Local	Express	10.840s (~)	11.022s (~)	0.182s	3	1.00x
🐘 Postgres	Express	15.373s (-24.5% 🟢)	16.049s (-23.8% 🟢)	0.676s	2	1.42x
🐘 Postgres	Nitro	15.377s (-23.9% 🟢)	16.047s (-23.8% 🟢)	0.670s	2	1.42x
💻 Local	Next.js (Turbopack)	⚠️ missing	-	-	-	-
🐘 Postgres	Next.js (Turbopack)	⚠️ missing	-	-	-	-

▲ Production (Vercel)

World	Framework	Workflow Time	Wall Time	Overhead	Samples	vs Fastest
▲ Vercel	🥇 Nitro	17.733s (+0.7%)	18.274s (-5.1% 🟢)	0.541s	2	1.00x
▲ Vercel	Express	17.780s (+0.6%)	18.496s (-1.5%)	0.715s	2	1.00x
▲ Vercel	Next.js (Turbopack)	17.988s (-9.7% 🟢)	18.947s (-9.2% 🟢)	0.959s	2	1.01x

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

workflow with 25 sequential steps

💻 Local Development

World	Framework	Workflow Time	Wall Time	Overhead	Samples	vs Fastest
💻 Local	🥇 Nitro	27.456s (~)	28.050s (~)	0.595s	3	1.00x
💻 Local	Express	27.561s (~)	28.053s (~)	0.492s	3	1.00x
🐘 Postgres	Express	37.684s (-24.9% 🟢)	38.100s (-24.7% 🟢)	0.416s	2	1.37x
🐘 Postgres	Nitro	39.697s (-21.4% 🟢)	40.104s (-21.6% 🟢)	0.408s	2	1.45x
💻 Local	Next.js (Turbopack)	⚠️ missing	-	-	-	-
🐘 Postgres	Next.js (Turbopack)	⚠️ missing	-	-	-	-

▲ Production (Vercel)

World	Framework	Workflow Time	Wall Time	Overhead	Samples	vs Fastest
▲ Vercel	🥇 Next.js (Turbopack)	43.839s (+1.4%)	45.184s (+0.8%)	1.345s	2	1.00x
▲ Vercel	Express	44.611s (+4.0%)	45.603s (+3.5%)	0.992s	2	1.02x
▲ Vercel	Nitro	47.048s (+8.7% 🔺)	48.245s (+8.9% 🔺)	1.196s	2	1.07x

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

workflow with 50 sequential steps

💻 Local Development

World	Framework	Workflow Time	Wall Time	Overhead	Samples	vs Fastest
💻 Local	🥇 Nitro	57.224s (~)	58.102s (~)	0.878s	2	1.00x
💻 Local	Express	57.407s (~)	58.105s (~)	0.698s	2	1.00x
🐘 Postgres	Express	80.309s (-20.0% 🟢)	80.688s (-20.3% 🟢)	0.379s	2	1.40x
🐘 Postgres	Nitro	92.910s (-7.2% 🟢)	93.230s (-7.0% 🟢)	0.320s	1	1.62x
💻 Local	Next.js (Turbopack)	⚠️ missing	-	-	-	-
🐘 Postgres	Next.js (Turbopack)	⚠️ missing	-	-	-	-

▲ Production (Vercel)

World	Framework	Workflow Time	Wall Time	Overhead	Samples	vs Fastest
▲ Vercel	🥇 Nitro	90.234s (+4.2%)	91.330s (+3.9%)	1.096s	1	1.00x
▲ Vercel	Express	90.540s (+2.5%)	91.752s (+3.0%)	1.212s	2	1.00x
▲ Vercel	Next.js (Turbopack)	101.032s (+14.7% 🔺)	102.200s (+14.3% 🔺)	1.168s	1	1.12x

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

Promise.all with 10 concurrent steps

💻 Local Development

World	Framework	Workflow Time	Wall Time	Overhead	Samples	vs Fastest
💻 Local	🥇 Nitro	1.407s (-1.9%)	2.005s (~)	0.598s	15	1.00x
💻 Local	Express	1.431s (+2.1%)	2.005s (~)	0.574s	15	1.02x
🐘 Postgres	Express	2.122s (-11.9% 🟢)	2.513s (-16.6% 🟢)	0.391s	12	1.51x
🐘 Postgres	Nitro	2.468s (+15.6% 🔺)	3.014s (~)	0.546s	10	1.75x
💻 Local	Next.js (Turbopack)	⚠️ missing	-	-	-	-
🐘 Postgres	Next.js (Turbopack)	⚠️ missing	-	-	-	-

▲ Production (Vercel)

World	Framework	Workflow Time	Wall Time	Overhead	Samples	vs Fastest
▲ Vercel	🥇 Express	2.635s (+8.6% 🔺)	3.502s (+3.8%)	0.867s	9	1.00x
▲ Vercel	Nitro	2.674s (+15.8% 🔺)	3.586s (+8.8% 🔺)	0.912s	9	1.01x
▲ Vercel	Next.js (Turbopack)	3.122s (-8.6% 🟢)	4.121s (-4.4%)	0.999s	8	1.18x

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

Promise.all with 25 concurrent steps

💻 Local Development

World	Framework	Workflow Time	Wall Time	Overhead	Samples	vs Fastest
💻 Local	🥇 Nitro	2.597s (~)	3.008s (~)	0.411s	10	1.00x
💻 Local	Express	2.639s (+3.4%)	3.007s (~)	0.368s	10	1.02x
🐘 Postgres	Nitro	8.924s (+5.2% 🔺)	9.528s (+5.4% 🔺)	0.605s	4	3.44x
🐘 Postgres	Express	10.188s (+26.2% 🔺)	10.697s (+29.2% 🔺)	0.509s	3	3.92x
💻 Local	Next.js (Turbopack)	⚠️ missing	-	-	-	-
🐘 Postgres	Next.js (Turbopack)	⚠️ missing	-	-	-	-

▲ Production (Vercel)

World	Framework	Workflow Time	Wall Time	Overhead	Samples	vs Fastest
▲ Vercel	🥇 Nitro	2.669s (~)	3.527s (+2.0%)	0.857s	9	1.00x
▲ Vercel	Express	2.820s (-9.3% 🟢)	3.630s (-14.2% 🟢)	0.810s	9	1.06x
▲ Vercel	Next.js (Turbopack)	2.948s (-7.6% 🟢)	4.635s (+18.4% 🔺)	1.687s	7	1.10x

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

Promise.all with 50 concurrent steps

💻 Local Development

World	Framework	Workflow Time	Wall Time	Overhead	Samples	vs Fastest
💻 Local	🥇 Nitro	7.271s (-1.0%)	8.021s (~)	0.750s	4	1.00x
💻 Local	Express	7.577s (+4.1%)	8.019s (~)	0.442s	4	1.04x
🐘 Postgres	Nitro	43.576s (-9.8% 🟢)	44.112s (-10.2% 🟢)	0.536s	1	5.99x
🐘 Postgres	Express	47.288s (+13.6% 🔺)	48.116s (+14.2% 🔺)	0.828s	1	6.50x
💻 Local	Next.js (Turbopack)	⚠️ missing	-	-	-	-
🐘 Postgres	Next.js (Turbopack)	⚠️ missing	-	-	-	-

▲ Production (Vercel)

World	Framework	Workflow Time	Wall Time	Overhead	Samples	vs Fastest
▲ Vercel	🥇 Nitro	4.206s (+25.9% 🔺)	5.287s (+22.9% 🔺)	1.081s	6	1.00x
▲ Vercel	Next.js (Turbopack)	4.404s (-13.3% 🟢)	5.568s (-8.7% 🟢)	1.164s	6	1.05x
▲ Vercel	Express	8.436s (+81.9% 🔺)	9.494s (+68.9% 🔺)	1.058s	4	2.01x

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

Promise.race with 10 concurrent steps

💻 Local Development

World	Framework	Workflow Time	Wall Time	Overhead	Samples	vs Fastest
💻 Local	🥇 Express	1.440s (+1.4%)	2.006s (~)	0.566s	15	1.00x
💻 Local	Nitro	1.446s (+1.1%)	2.005s (~)	0.559s	15	1.00x
🐘 Postgres	Nitro	2.059s (-9.4% 🟢)	2.682s (~)	0.622s	12	1.43x
🐘 Postgres	Express	2.069s (+5.4% 🔺)	2.397s (-4.7%)	0.327s	13	1.44x
💻 Local	Next.js (Turbopack)	⚠️ missing	-	-	-	-
🐘 Postgres	Next.js (Turbopack)	⚠️ missing	-	-	-	-

▲ Production (Vercel)

World	Framework	Workflow Time	Wall Time	Overhead	Samples	vs Fastest
▲ Vercel	🥇 Nitro	2.307s (-13.3% 🟢)	3.146s (-13.5% 🟢)	0.839s	10	1.00x
▲ Vercel	Next.js (Turbopack)	3.648s (+62.2% 🔺)	4.726s (+46.9% 🔺)	1.078s	7	1.58x
▲ Vercel	Express	15.148s (+585.0% 🔺)	16.281s (+397.6% 🔺)	1.133s	2	6.57x

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

Promise.race with 25 concurrent steps

💻 Local Development

World	Framework	Workflow Time	Wall Time	Overhead	Samples	vs Fastest
💻 Local	🥇 Nitro	2.674s (~)	3.007s (~)	0.333s	10	1.00x
💻 Local	Express	2.753s (+2.6%)	3.009s (~)	0.256s	10	1.03x
🐘 Postgres	Express	10.352s (-9.6% 🟢)	10.694s (-11.1% 🟢)	0.342s	3	3.87x
🐘 Postgres	Nitro	10.978s (-17.6% 🟢)	11.699s (-14.7% 🟢)	0.720s	3	4.11x
💻 Local	Next.js (Turbopack)	⚠️ missing	-	-	-	-
🐘 Postgres	Next.js (Turbopack)	⚠️ missing	-	-	-	-

▲ Production (Vercel)

World	Framework	Workflow Time	Wall Time	Overhead	Samples	vs Fastest
▲ Vercel	🥇 Nitro	2.662s (+15.5% 🔺)	3.332s (+4.7%)	0.670s	10	1.00x
▲ Vercel	Next.js (Turbopack)	5.975s (+138.2% 🔺)	6.864s (+99.6% 🔺)	0.889s	6	2.24x
▲ Vercel	Express	12.221s (+361.9% 🔺)	13.438s (+277.8% 🔺)	1.217s	3	4.59x

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

Promise.race with 50 concurrent steps

💻 Local Development

World	Framework	Workflow Time	Wall Time	Overhead	Samples	vs Fastest
💻 Local	🥇 Nitro	8.056s (+2.4%)	8.267s (~)	0.211s	4	1.00x
💻 Local	Express	8.076s (~)	8.774s (+6.1% 🔺)	0.697s	4	1.00x
🐘 Postgres	Express	49.148s (-4.6%)	50.107s (-3.9%)	0.959s	1	6.10x
🐘 Postgres	Nitro	51.540s (-0.8%)	52.127s (~)	0.587s	1	6.40x
💻 Local	Next.js (Turbopack)	⚠️ missing	-	-	-	-
🐘 Postgres	Next.js (Turbopack)	⚠️ missing	-	-	-	-

▲ Production (Vercel)

World	Framework	Workflow Time	Wall Time	Overhead	Samples	vs Fastest
▲ Vercel	🥇 Nitro	13.749s (+343.9% 🔺)	14.661s (+267.9% 🔺)	0.912s	3	1.00x
▲ Vercel	Next.js (Turbopack)	19.264s (+399.3% 🔺)	20.451s (+306.5% 🔺)	1.187s	2	1.40x
▲ Vercel	Express	33.611s (+771.4% 🔺)	38.442s (+726.8% 🔺)	4.831s	1	2.44x

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

Stream Benchmarks (includes TTFB metrics)

workflow with stream

💻 Local Development

World	Framework	Workflow Time	TTFB	Slurp	Wall Time	Overhead	Samples	vs Fastest
💻 Local	🥇 Nitro	0.171s (-2.2%)	1.002s (~)	0.011s (-3.6%)	1.016s (~)	0.845s	10	1.00x
💻 Local	Express	0.177s (+4.7%)	1.002s (~)	0.011s (-4.3%)	1.016s (~)	0.840s	10	1.03x
🐘 Postgres	Nitro	1.368s (-38.6% 🟢)	1.674s (-40.6% 🟢)	0.002s (+11.8% 🔺)	2.015s (-33.2% 🟢)	0.647s	10	7.98x
🐘 Postgres	Express	1.379s (-43.9% 🟢)	1.661s (-35.7% 🟢)	0.002s (+15.4% 🔺)	2.013s (-33.2% 🟢)	0.633s	10	8.05x
💻 Local	Next.js (Turbopack)	⚠️ missing	-	-	-	-	-
🐘 Postgres	Next.js (Turbopack)	⚠️ missing	-	-	-	-	-

▲ Production (Vercel)

World	Framework	Workflow Time	TTFB	Slurp	Wall Time	Overhead	Samples	vs Fastest
▲ Vercel	🥇 Next.js (Turbopack)	2.032s (-18.3% 🟢)	2.653s (-13.5% 🟢)	0.288s (+24.3% 🔺)	3.491s (-9.5% 🟢)	1.459s	10	1.00x
▲ Vercel	Express	2.100s (+6.8% 🔺)	2.743s (+4.1%)	0.126s (-79.3% 🟢)	3.420s (-9.9% 🟢)	1.320s	10	1.03x
▲ Vercel	Nitro	2.151s (+11.0% 🔺)	2.828s (+5.2% 🔺)	0.224s (-61.9% 🟢)	3.571s (-6.5% 🟢)	1.420s	10	1.06x

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

Summary

Fastest Framework by World

Winner determined by most benchmark wins

World	🥇 Fastest Framework	Wins
💻 Local	Nitro	11/12
🐘 Postgres	Nitro	6/12
▲ Vercel	Nitro	8/12

Fastest World by Framework

Winner determined by most benchmark wins

Framework	🥇 Fastest World	Wins
Express	💻 Local	12/12
Next.js (Turbopack)	▲ Vercel	12/12
Nitro	💻 Local	10/12

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

Wrap writer.write() + releaseLock() in try/finally blocks to ensure locks are always released, matching the Streaming guide's best practices.

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vercel bot deployed to Preview – workbench-hono-workflow February 18, 2026 17:57 View deployment

vercel bot deployed to Preview – workflow-nest February 18, 2026 17:57 View deployment

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vercel bot deployed to Preview – workbench-fastify-workflow February 18, 2026 17:57 View deployment

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vercel bot deployed to Preview – workbench-astro-workflow February 18, 2026 17:58 View deployment

vercel bot deployed to Preview – workbench-vite-workflow February 18, 2026 17:58 View deployment

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vercel bot deployed to Preview – workbench-sveltekit-workflow February 18, 2026 17:59 View deployment

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vercel bot deployed to Preview – workbench-nuxt-workflow February 18, 2026 17:59 View deployment

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docs(ai): add generation pipelines guide for non-chat AI workflows

6267c8d

johnlindquist force-pushed the docs/ai-generation branch from 77af417 to 6267c8d Compare February 18, 2026 18:02

docs(ai): add try/finally for stream writer lock safety

6d0f102

Wrap writer.write() + releaseLock() in try/finally blocks to ensure locks are always released, matching the Streaming guide's best practices.

vercel bot deployed to Preview – workflow-swc-playground February 18, 2026 19:27 View deployment

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vercel bot deployed to Preview – workbench-express-workflow February 18, 2026 19:27 View deployment

vercel bot deployed to Preview – workflow-nest February 18, 2026 19:27 View deployment

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vercel bot deployed to Preview – workbench-hono-workflow February 18, 2026 19:27 View deployment

vercel bot deployed to Preview – workbench-nitro-workflow February 18, 2026 19:27 View deployment

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docs(ai): use @workflow/ai provider wrappers and stepId for idempotency

021f818

vercel bot deployed to Preview – workflow-swc-playground February 18, 2026 20:41 View deployment

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vercel bot deployed to Preview – workbench-sveltekit-workflow February 18, 2026 20:41 View deployment

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vercel bot deployed to Preview – workbench-hono-workflow February 18, 2026 20:41 View deployment

vercel bot deployed to Preview – example-workflow February 18, 2026 20:41 View deployment

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Conversation

johnlindquist commented Feb 18, 2026

Summary

Test plan

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🧪 E2E Test Results

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❌ Failed Tests

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📊 Benchmark Results

💻 Local Development

▲ Production (Vercel)

💻 Local Development

▲ Production (Vercel)

💻 Local Development

▲ Production (Vercel)

💻 Local Development

▲ Production (Vercel)

💻 Local Development

▲ Production (Vercel)

💻 Local Development

▲ Production (Vercel)

💻 Local Development

▲ Production (Vercel)

💻 Local Development

▲ Production (Vercel)

💻 Local Development

▲ Production (Vercel)

💻 Local Development

▲ Production (Vercel)

💻 Local Development

▲ Production (Vercel)

💻 Local Development

▲ Production (Vercel)

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