feat(next): add /_workflow web ui during dev by VaguelySerious · Pull Request #2111 · vercel/workflow

VaguelySerious · 2026-05-26T14:47:42Z

Adds a /_workflow redirect during next dev that boots the @workflow/web observability dashboard on a random port and redirects the browser to it.

Mirrors #2110 for the Next.js integration.

Test plan

pnpm build in packages/next succeeds
curl -i http://localhost:3000/_workflow from workbench/nextjs-turbopack returns 307 to http://localhost:<random-port>/
Dashboard root responds 200 with <title>Workflow Observability UI</title>

🤖 Generated with Claude Code

Adds a `/_workflow` redirect during `next dev` that boots the `@workflow/web` observability dashboard on a random port and redirects the browser to it. Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

changeset-bot · 2026-05-26T14:47:47Z

🦋 Changeset detected

Latest commit: cdfbc6e

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

This PR includes changesets to release 16 packages

Name	Type
@workflow/next	Minor
workflow	Patch
@workflow/world-testing	Patch
@workflow/core	Patch
@workflow/builders	Patch
@workflow/cli	Patch
@workflow/nitro	Patch
@workflow/vitest	Patch
@workflow/web-shared	Patch
@workflow/web	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

github-actions · 2026-05-26T14:47:54Z

📊 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	0.032s (-27.5% 🟢)	1.005s (~)	0.973s	10	1.00x
💻 Local	Nitro	0.034s (-20.4% 🟢)	1.013s (+0.7%)	0.978s	10	1.07x
💻 Local	Next.js (Turbopack)	0.051s	1.006s	0.955s	10	1.58x
🐘 Postgres	Nitro	0.052s (-45.6% 🟢)	1.012s (-2.9%)	0.961s	10	1.61x
🐘 Postgres	Express	0.053s (-9.1% 🟢)	1.012s (~)	0.959s	10	1.64x
🐘 Postgres	Next.js (Turbopack)	0.059s	1.010s	0.952s	10	1.83x

▲ Production (Vercel)

World	Framework	Workflow Time	Wall Time	Overhead	Samples	vs Fastest
▲ Vercel	🥇 Nitro	0.273s (-33.5% 🟢)	2.095s (-16.5% 🟢)	1.823s	10	1.00x
▲ Vercel	Express	0.304s (+29.0% 🔺)	2.339s (+9.5% 🔺)	2.035s	10	1.11x
▲ Vercel	Next.js (Turbopack)	0.414s (+64.5% 🔺)	2.263s (-3.0%)	1.850s	10	1.52x

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

workflow with 1 step

💻 Local Development

World	Framework	Workflow Time	Wall Time	Overhead	Samples	vs Fastest
💻 Local	🥇 Nitro	1.060s (-6.3% 🟢)	2.005s (~)	0.946s	10	1.00x
💻 Local	Express	1.073s (-4.6%)	2.006s (~)	0.933s	10	1.01x
🐘 Postgres	Nitro	1.081s (-5.2% 🟢)	2.009s (~)	0.929s	10	1.02x
🐘 Postgres	Express	1.086s (-5.3% 🟢)	2.008s (~)	0.922s	10	1.02x
💻 Local	Next.js (Turbopack)	1.109s	2.006s	0.897s	10	1.05x
🐘 Postgres	Next.js (Turbopack)	1.129s	2.009s	0.880s	10	1.07x

▲ Production (Vercel)

World	Framework	Workflow Time	Wall Time	Overhead	Samples	vs Fastest
▲ Vercel	🥇 Nitro	1.558s (-60.0% 🟢)	3.420s (-42.1% 🟢)	1.863s	10	1.00x
▲ Vercel	Next.js (Turbopack)	1.601s (-21.3% 🟢)	3.610s (-5.8% 🟢)	2.009s	10	1.03x
▲ Vercel	Express	1.632s (-13.0% 🟢)	3.486s (-8.4% 🟢)	1.854s	10	1.05x

🔍 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	10.357s (-5.4% 🟢)	11.021s (~)	0.665s	3	1.00x
💻 Local	Express	10.425s (-4.5%)	11.023s (~)	0.598s	3	1.01x
🐘 Postgres	Nitro	10.432s (-4.0%)	11.017s (~)	0.585s	3	1.01x
🐘 Postgres	Express	10.437s (-4.8%)	11.018s (~)	0.581s	3	1.01x
💻 Local	Next.js (Turbopack)	10.652s	11.022s	0.370s	3	1.03x
🐘 Postgres	Next.js (Turbopack)	10.721s	11.016s	0.295s	3	1.04x

▲ Production (Vercel)

World	Framework	Workflow Time	Wall Time	Overhead	Samples	vs Fastest
▲ Vercel	🥇 Express	13.633s (-19.7% 🟢)	15.386s (-23.1% 🟢)	1.754s	2	1.00x
▲ Vercel	Nitro	13.960s (-41.2% 🟢)	15.020s (-40.2% 🟢)	1.060s	2	1.02x
▲ Vercel	Next.js (Turbopack)	15.831s (-8.6% 🟢)	17.890s (-7.8% 🟢)	2.059s	2	1.16x

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

workflow with 25 sequential steps

💻 Local Development

World	Framework	Workflow Time	Wall Time	Overhead	Samples	vs Fastest
💻 Local	🥇 Nitro	13.335s (-11.5% 🟢)	14.028s (-12.5% 🟢)	0.693s	5	1.00x
🐘 Postgres	Nitro	13.457s (-7.8% 🟢)	14.017s (-6.7% 🟢)	0.560s	5	1.01x
💻 Local	Express	13.496s (-9.8% 🟢)	14.028s (-6.7% 🟢)	0.532s	5	1.01x
🐘 Postgres	Express	13.499s (-7.4% 🟢)	14.023s (-6.6% 🟢)	0.524s	5	1.01x
💻 Local	Next.js (Turbopack)	14.043s	14.829s	0.786s	5	1.05x
🐘 Postgres	Next.js (Turbopack)	14.181s	15.014s	0.833s	4	1.06x

▲ Production (Vercel)

World	Framework	Workflow Time	Wall Time	Overhead	Samples	vs Fastest
▲ Vercel	🥇 Nitro	20.975s (-67.5% 🟢)	22.742s (-65.9% 🟢)	1.768s	3	1.00x
▲ Vercel	Next.js (Turbopack)	22.553s (-57.1% 🟢)	24.688s (-54.8% 🟢)	2.134s	3	1.08x
▲ Vercel	Express	22.652s (-55.0% 🟢)	24.524s (-53.3% 🟢)	1.872s	3	1.08x

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

workflow with 50 sequential steps

💻 Local Development

World	Framework	Workflow Time	Wall Time	Overhead	Samples	vs Fastest
💻 Local	🥇 Nitro	11.676s (-30.4% 🟢)	12.022s (-29.4% 🟢)	0.346s	8	1.00x
🐘 Postgres	Nitro	11.934s (-14.6% 🟢)	12.269s (-14.3% 🟢)	0.335s	8	1.02x
🐘 Postgres	Express	11.937s (-14.8% 🟢)	12.140s (-16.8% 🟢)	0.204s	8	1.02x
💻 Local	Express	11.973s (-27.9% 🟢)	12.399s (-27.2% 🟢)	0.426s	8	1.03x
💻 Local	Next.js (Turbopack)	13.012s	13.309s	0.298s	7	1.11x
🐘 Postgres	Next.js (Turbopack)	13.223s	14.017s	0.793s	7	1.13x

▲ Production (Vercel)

World	Framework	Workflow Time	Wall Time	Overhead	Samples	vs Fastest
▲ Vercel	🥇 Express	29.367s (-75.8% 🟢)	31.297s (-74.7% 🟢)	1.929s	3	1.00x
▲ Vercel	Next.js (Turbopack)	31.493s (-92.0% 🟢)	33.479s (-91.5% 🟢)	1.986s	3	1.07x
▲ Vercel	Nitro	33.290s (-92.1% 🟢)	34.889s (-91.8% 🟢)	1.599s	3	1.13x

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

Promise.all with 10 concurrent steps

💻 Local Development

World	Framework	Workflow Time	Wall Time	Overhead	Samples	vs Fastest
💻 Local	🥇 Nitro	1.143s (-29.9% 🟢)	2.005s (-3.3%)	0.862s	15	1.00x
🐘 Postgres	Express	1.152s (-8.6% 🟢)	2.008s (~)	0.856s	15	1.01x
🐘 Postgres	Nitro	1.157s (-9.2% 🟢)	2.007s (~)	0.850s	15	1.01x
💻 Local	Express	1.173s (-21.2% 🟢)	2.007s (~)	0.834s	15	1.03x
🐘 Postgres	Next.js (Turbopack)	1.192s	2.006s	0.814s	15	1.04x
💻 Local	Next.js (Turbopack)	1.278s	2.006s	0.728s	15	1.12x

▲ Production (Vercel)

World	Framework	Workflow Time	Wall Time	Overhead	Samples	vs Fastest
▲ Vercel	🥇 Next.js (Turbopack)	2.812s (-17.2% 🟢)	4.642s (-5.9% 🟢)	1.830s	7	1.00x
▲ Vercel	Nitro	3.061s (+8.6% 🔺)	4.632s (+7.2% 🔺)	1.572s	7	1.09x
▲ Vercel	Express	3.229s (+12.9% 🔺)	5.144s (+11.3% 🔺)	1.915s	6	1.15x

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

Promise.all with 25 concurrent steps

💻 Local Development

World	Framework	Workflow Time	Wall Time	Overhead	Samples	vs Fastest
🐘 Postgres	🥇 Nitro	1.201s (-48.9% 🟢)	2.006s (-33.3% 🟢)	0.805s	15	1.00x
🐘 Postgres	Express	1.206s (-48.9% 🟢)	2.006s (-33.3% 🟢)	0.801s	15	1.00x
🐘 Postgres	Next.js (Turbopack)	1.346s	2.007s	0.661s	15	1.12x
💻 Local	Nitro	1.597s (-49.2% 🟢)	2.005s (-48.4% 🟢)	0.408s	15	1.33x
💻 Local	Next.js (Turbopack)	1.677s	2.006s	0.329s	15	1.40x
💻 Local	Express	1.696s (-42.6% 🟢)	2.006s (-41.9% 🟢)	0.310s	15	1.41x

▲ Production (Vercel)

World	Framework	Workflow Time	Wall Time	Overhead	Samples	vs Fastest
▲ Vercel	🥇 Nitro	3.356s (-17.2% 🟢)	4.852s (-18.0% 🟢)	1.497s	7	1.00x
▲ Vercel	Express	3.560s (-1.6%)	5.148s (+0.7%)	1.588s	6	1.06x
▲ Vercel	Next.js (Turbopack)	6.102s (-14.1% 🟢)	7.706s (-13.5% 🟢)	1.604s	4	1.82x

🔍 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	🥇 Nitro	1.321s (-62.0% 🟢)	2.008s (-49.9% 🟢)	0.687s	15	1.00x
🐘 Postgres	Express	1.321s (-62.1% 🟢)	2.008s (-49.9% 🟢)	0.687s	15	1.00x
🐘 Postgres	Next.js (Turbopack)	1.593s	2.007s	0.414s	15	1.21x
💻 Local	Nitro	3.840s (-54.0% 🟢)	4.438s (-50.8% 🟢)	0.599s	7	2.91x
💻 Local	Next.js (Turbopack)	4.524s	5.155s	0.631s	7	3.42x
💻 Local	Express	4.757s (-42.9% 🟢)	5.156s (-42.9% 🟢)	0.398s	7	3.60x

▲ Production (Vercel)

World	Framework	Workflow Time	Wall Time	Overhead	Samples	vs Fastest
▲ Vercel	🥇 Next.js (Turbopack)	6.215s (-30.3% 🟢)	8.063s (-26.4% 🟢)	1.848s	4	1.00x
▲ Vercel	Express	6.350s (+49.8% 🔺)	7.891s (+28.8% 🔺)	1.541s	4	1.02x
▲ Vercel	Nitro	6.366s (+80.6% 🔺)	8.038s (+45.3% 🔺)	1.672s	4	1.02x

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

Promise.race with 10 concurrent steps

💻 Local Development

World	Framework	Workflow Time	Wall Time	Overhead	Samples	vs Fastest
🐘 Postgres	🥇 Nitro	1.150s (-8.5% 🟢)	2.009s (~)	0.859s	15	1.00x
🐘 Postgres	Express	1.153s (-8.3% 🟢)	2.008s (~)	0.854s	15	1.00x
🐘 Postgres	Next.js (Turbopack)	1.200s	2.008s	0.808s	15	1.04x
💻 Local	Nitro	1.331s (-28.6% 🟢)	2.006s (-14.3% 🟢)	0.674s	15	1.16x
💻 Local	Express	1.421s (-24.9% 🟢)	2.006s (-15.1% 🟢)	0.585s	15	1.24x
💻 Local	Next.js (Turbopack)	1.700s	2.391s	0.692s	13	1.48x

▲ Production (Vercel)

World	Framework	Workflow Time	Wall Time	Overhead	Samples	vs Fastest
▲ Vercel	🥇 Next.js (Turbopack)	2.468s (-15.8% 🟢)	4.125s (-11.1% 🟢)	1.657s	8	1.00x
▲ Vercel	Nitro	2.705s (+10.0% 🔺)	4.042s (-3.1%)	1.337s	8	1.10x
▲ Vercel	Express	2.734s (+5.9% 🔺)	4.290s (-1.4%)	1.556s	7	1.11x

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

Promise.race with 25 concurrent steps

💻 Local Development

World	Framework	Workflow Time	Wall Time	Overhead	Samples	vs Fastest
🐘 Postgres	🥇 Nitro	1.196s (-48.9% 🟢)	2.008s (-33.3% 🟢)	0.812s	15	1.00x
🐘 Postgres	Express	1.211s (-48.3% 🟢)	2.009s (-33.3% 🟢)	0.798s	15	1.01x
🐘 Postgres	Next.js (Turbopack)	1.333s	2.007s	0.674s	15	1.11x
💻 Local	Nitro	1.771s (-42.2% 🟢)	2.220s (-42.9% 🟢)	0.449s	14	1.48x
💻 Local	Express	1.818s (-42.0% 🟢)	2.223s (-40.9% 🟢)	0.405s	14	1.52x
💻 Local	Next.js (Turbopack)	2.000s	2.392s	0.392s	13	1.67x

▲ Production (Vercel)

World	Framework	Workflow Time	Wall Time	Overhead	Samples	vs Fastest
▲ Vercel	🥇 Express	3.411s (+6.8% 🔺)	5.286s (+10.3% 🔺)	1.875s	6	1.00x
▲ Vercel	Next.js (Turbopack)	3.471s (+10.5% 🔺)	5.247s (+16.0% 🔺)	1.776s	6	1.02x
▲ Vercel	Nitro	3.798s (+17.5% 🔺)	5.378s (+5.9% 🔺)	1.580s	6	1.11x

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

Promise.race with 50 concurrent steps

💻 Local Development

World	Framework	Workflow Time	Wall Time	Overhead	Samples	vs Fastest
🐘 Postgres	🥇 Nitro	1.316s (-62.2% 🟢)	2.009s (-49.9% 🟢)	0.693s	15	1.00x
🐘 Postgres	Express	1.367s (-60.9% 🟢)	2.008s (-49.9% 🟢)	0.641s	15	1.04x
🐘 Postgres	Next.js (Turbopack)	1.595s	2.009s	0.414s	15	1.21x
💻 Local	Nitro	4.172s (-54.4% 🟢)	4.725s (-52.9% 🟢)	0.553s	7	3.17x
💻 Local	Next.js (Turbopack)	4.705s	5.345s	0.640s	6	3.58x
💻 Local	Express	5.741s (-34.8% 🟢)	6.214s (-33.0% 🟢)	0.473s	5	4.36x

▲ Production (Vercel)

World	Framework	Workflow Time	Wall Time	Overhead	Samples	vs Fastest
▲ Vercel	🥇 Next.js (Turbopack)	5.508s (-18.5% 🟢)	7.370s (-13.7% 🟢)	1.863s	5	1.00x
▲ Vercel	Nitro	7.011s (+37.7% 🔺)	8.327s (+22.1% 🔺)	1.316s	4	1.27x
▲ Vercel	Express	7.220s (+12.5% 🔺)	8.841s (+8.1% 🔺)	1.620s	4	1.31x

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

workflow with 10 sequential data payload steps (10KB)

💻 Local Development

World	Framework	Workflow Time	Wall Time	Overhead	Samples	vs Fastest
🐘 Postgres	🥇 Nitro	0.440s (-46.4% 🟢)	1.007s (~)	0.568s	60	1.00x
🐘 Postgres	Express	0.454s (-45.9% 🟢)	1.007s (-1.6%)	0.553s	60	1.03x
💻 Local	Express	0.473s (-51.9% 🟢)	1.004s (-6.7% 🟢)	0.531s	60	1.08x
💻 Local	Nitro	0.528s (-46.2% 🟢)	1.004s (-8.2% 🟢)	0.476s	60	1.20x
🐘 Postgres	Next.js (Turbopack)	0.672s	1.006s	0.334s	60	1.53x
💻 Local	Next.js (Turbopack)	0.737s	1.004s	0.267s	60	1.68x

▲ Production (Vercel)

World	Framework	Workflow Time	Wall Time	Overhead	Samples	vs Fastest
▲ Vercel	🥇 Nitro	5.173s (-76.5% 🟢)	6.724s (-72.0% 🟢)	1.550s	9	1.00x
▲ Vercel	Next.js (Turbopack)	5.252s (-63.8% 🟢)	7.030s (-56.3% 🟢)	1.778s	9	1.02x
▲ Vercel	Express	5.561s (-70.8% 🟢)	7.296s (-65.8% 🟢)	1.735s	9	1.07x

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

workflow with 25 sequential data payload steps (10KB)

💻 Local Development

World	Framework	Workflow Time	Wall Time	Overhead	Samples	vs Fastest
🐘 Postgres	🥇 Nitro	1.031s (-46.5% 🟢)	1.558s (-25.8% 🟢)	0.527s	58	1.00x
🐘 Postgres	Express	1.137s (-42.5% 🟢)	1.964s (-13.0% 🟢)	0.826s	46	1.10x
💻 Local	Express	1.248s (-58.6% 🟢)	2.006s (-44.1% 🟢)	0.757s	45	1.21x
💻 Local	Nitro	1.351s (-55.5% 🟢)	1.984s (-47.2% 🟢)	0.632s	46	1.31x
🐘 Postgres	Next.js (Turbopack)	1.598s	2.007s	0.409s	45	1.55x
💻 Local	Next.js (Turbopack)	1.822s	2.028s	0.205s	45	1.77x

▲ Production (Vercel)

World	Framework	Workflow Time	Wall Time	Overhead	Samples	vs Fastest
▲ Vercel	🥇 Nitro	12.653s (-68.0% 🟢)	14.422s (-65.1% 🟢)	1.769s	7	1.00x
▲ Vercel	Express	13.780s (-60.1% 🟢)	15.985s (-56.6% 🟢)	2.205s	6	1.09x
▲ Vercel	Next.js (Turbopack)	14.008s (-71.9% 🟢)	16.046s (-69.0% 🟢)	2.037s	6	1.11x

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

workflow with 50 sequential data payload steps (10KB)

💻 Local Development

World	Framework	Workflow Time	Wall Time	Overhead	Samples	vs Fastest
🐘 Postgres	🥇 Nitro	2.072s (-49.5% 🟢)	2.477s (-46.2% 🟢)	0.405s	49	1.00x
🐘 Postgres	Express	2.323s (-41.8% 🟢)	2.889s (-33.9% 🟢)	0.566s	42	1.12x
💻 Local	Nitro	2.780s (-70.1% 🟢)	3.251s (-67.6% 🟢)	0.470s	37	1.34x
💻 Local	Express	2.799s (-69.6% 🟢)	3.085s (-69.2% 🟢)	0.286s	39	1.35x
🐘 Postgres	Next.js (Turbopack)	3.122s	4.009s	0.887s	30	1.51x
💻 Local	Next.js (Turbopack)	3.862s	4.108s	0.246s	30	1.86x

▲ Production (Vercel)

World	Framework	Workflow Time	Wall Time	Overhead	Samples	vs Fastest
▲ Vercel	🥇 Nitro	26.080s (-73.1% 🟢)	28.587s (-71.0% 🟢)	2.506s	5	1.00x
▲ Vercel	Express	26.401s (-79.7% 🟢)	28.748s (-78.2% 🟢)	2.347s	5	1.01x
▲ Vercel	Next.js (Turbopack)	28.192s (-73.7% 🟢)	30.409s (-72.1% 🟢)	2.216s	4	1.08x

🔍 Observability: Nitro | 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	🥇 Nitro	0.177s (-37.7% 🟢)	1.006s (~)	0.829s	60	1.00x
🐘 Postgres	Express	0.189s (-32.9% 🟢)	1.006s (~)	0.816s	60	1.07x
🐘 Postgres	Next.js (Turbopack)	0.223s	1.006s	0.783s	60	1.26x
💻 Local	Nitro	0.371s (-38.7% 🟢)	1.004s (-1.7%)	0.633s	60	2.10x
💻 Local	Express	0.408s (-27.2% 🟢)	1.004s (~)	0.597s	60	2.31x
💻 Local	Next.js (Turbopack)	0.540s	1.004s	0.464s	60	3.06x

▲ Production (Vercel)

World	Framework	Workflow Time	Wall Time	Overhead	Samples	vs Fastest
▲ Vercel	🥇 Express	2.165s (+10.8% 🔺)	3.900s (+7.2% 🔺)	1.736s	16	1.00x
▲ Vercel	Next.js (Turbopack)	2.320s (+14.7% 🔺)	4.115s (+8.5% 🔺)	1.795s	15	1.07x
▲ Vercel	Nitro	2.511s (+51.2% 🔺)	4.296s (+28.2% 🔺)	1.784s	16	1.16x

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

workflow with 25 concurrent data payload steps (10KB)

💻 Local Development

World	Framework	Workflow Time	Wall Time	Overhead	Samples	vs Fastest
🐘 Postgres	🥇 Express	0.295s (-42.2% 🟢)	1.006s (~)	0.712s	90	1.00x
🐘 Postgres	Nitro	0.302s (-39.1% 🟢)	1.006s (~)	0.704s	90	1.03x
🐘 Postgres	Next.js (Turbopack)	0.427s	1.006s	0.579s	90	1.45x
💻 Local	Nitro	1.921s (-24.3% 🟢)	2.316s (-23.0% 🟢)	0.395s	39	6.52x
💻 Local	Express	2.158s (-14.1% 🟢)	2.767s (-8.0% 🟢)	0.609s	33	7.32x
💻 Local	Next.js (Turbopack)	2.183s	2.945s	0.763s	31	7.41x

▲ Production (Vercel)

World	Framework	Workflow Time	Wall Time	Overhead	Samples	vs Fastest
▲ Vercel	🥇 Express	5.100s (+67.4% 🔺)	7.006s (+45.7% 🔺)	1.906s	13	1.00x
▲ Vercel	Next.js (Turbopack)	5.405s (+52.9% 🔺)	7.311s (+40.8% 🔺)	1.906s	13	1.06x
▲ Vercel	Nitro	5.710s (+77.0% 🔺)	7.140s (+48.1% 🔺)	1.431s	13	1.12x

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

workflow with 50 concurrent data payload steps (10KB)

💻 Local Development

World	Framework	Workflow Time	Wall Time	Overhead	Samples	vs Fastest
🐘 Postgres	🥇 Express	0.624s (-23.8% 🟢)	1.006s (-1.1%)	0.382s	120	1.00x
🐘 Postgres	Nitro	0.636s (-19.5% 🟢)	1.007s (~)	0.371s	120	1.02x
🐘 Postgres	Next.js (Turbopack)	0.879s	1.059s	0.180s	114	1.41x
💻 Local	Nitro	9.006s (-19.5% 🟢)	9.411s (-19.3% 🟢)	0.405s	13	14.43x
💻 Local	Express	10.137s (-9.4% 🟢)	10.781s (-9.7% 🟢)	0.644s	12	16.24x
💻 Local	Next.js (Turbopack)	10.823s	11.303s	0.480s	11	17.34x

▲ Production (Vercel)

World	Framework	Workflow Time	Wall Time	Overhead	Samples	vs Fastest
▲ Vercel	🥇 Express	14.111s (+90.2% 🔺)	15.859s (+71.6% 🔺)	1.747s	8	1.00x
▲ Vercel	Nitro	15.799s (+104.6% 🔺)	17.663s (+87.9% 🔺)	1.864s	7	1.12x
▲ Vercel	Next.js (Turbopack)	16.971s (+64.3% 🔺)	19.437s (+58.2% 🔺)	2.466s	7	1.20x

🔍 Observability: Express | 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	🥇 Nitro	1.126s (+427.0% 🔺)	2.005s (+99.6% 🔺)	0.009s (-28.8% 🟢)	2.016s (+97.9% 🔺)	0.890s	10	1.00x
🐘 Postgres	Nitro	1.139s (+455.5% 🔺)	2.001s (+100.2% 🔺)	0.001s (-26.7% 🟢)	2.010s (+98.7% 🔺)	0.871s	10	1.01x
💻 Local	Express	1.147s (+476.0% 🔺)	2.005s (+99.6% 🔺)	0.011s (-12.4% 🟢)	2.018s (+98.2% 🔺)	0.871s	10	1.02x
🐘 Postgres	Express	1.149s (+460.0% 🔺)	1.999s (+100.2% 🔺)	0.002s (-6.3% 🟢)	2.010s (+98.8% 🔺)	0.862s	10	1.02x
💻 Local	Next.js (Turbopack)	1.177s	2.004s	0.010s	2.018s	0.840s	10	1.05x
🐘 Postgres	Next.js (Turbopack)	1.194s	2.002s	0.001s	2.012s	0.818s	10	1.06x

▲ Production (Vercel)

World	Framework	Workflow Time	TTFB	Slurp	Wall Time	Overhead	Samples	vs Fastest
▲ Vercel	🥇 Next.js (Turbopack)	2.410s (-64.8% 🟢)	4.145s (-52.1% 🟢)	13.126s (+1977.2% 🔺)	17.774s (+81.6% 🔺)	15.364s	10	1.00x
▲ Vercel	Express	2.477s (-1.1%)	3.666s (-10.4% 🟢)	2.090s (+117.6% 🔺)	6.208s (+11.0% 🔺)	3.731s	10	1.03x
▲ Vercel	Nitro	2.974s (-22.4% 🟢)	4.026s (-23.7% 🟢)	2.060s (+177.6% 🔺)	6.483s (~)	3.509s	10	1.23x

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

stream pipeline with 5 transform steps (1MB)

💻 Local Development

World	Framework	Workflow Time	TTFB	Slurp	Wall Time	Overhead	Samples	vs Fastest
💻 Local	🥇 Nitro	1.472s (+75.6% 🔺)	2.010s (+98.6% 🔺)	0.009s (-4.0%)	2.021s (+81.1% 🔺)	0.548s	30	1.00x
🐘 Postgres	Express	1.526s (+142.3% 🔺)	2.003s (+99.0% 🔺)	0.004s (+2.7%)	2.026s (+98.0% 🔺)	0.499s	30	1.04x
🐘 Postgres	Nitro	1.538s (+146.4% 🔺)	2.003s (+99.0% 🔺)	0.004s (-4.1%)	2.031s (+98.6% 🔺)	0.493s	30	1.04x
💻 Local	Express	1.542s (+103.6% 🔺)	2.013s (+95.6% 🔺)	0.010s (+8.4% 🔺)	2.025s (+94.8% 🔺)	0.484s	30	1.05x
🐘 Postgres	Next.js (Turbopack)	1.663s	2.010s	0.004s	2.023s	0.361s	30	1.13x
💻 Local	Next.js (Turbopack)	1.673s	2.010s	0.011s	2.024s	0.351s	30	1.14x

▲ Production (Vercel)

World	Framework	Workflow Time	TTFB	Slurp	Wall Time	Overhead	Samples	vs Fastest
▲ Vercel	🥇 Nitro	6.048s (-79.5% 🟢)	7.020s (-77.2% 🟢)	0.215s (+92.1% 🔺)	7.684s (-75.8% 🟢)	1.635s	8	1.00x
▲ Vercel	Express	6.205s (-4.6%)	7.594s (-5.2% 🟢)	0.252s (-38.3% 🟢)	8.318s (-5.8% 🟢)	2.113s	8	1.03x
▲ Vercel	Next.js (Turbopack)	6.599s (-61.0% 🟢)	8.038s (-55.9% 🟢)	0.266s (+25.7% 🔺)	8.775s (-53.7% 🟢)	2.176s	7	1.09x

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

10 parallel streams (1MB each)

💻 Local Development

World	Framework	Workflow Time	TTFB	Slurp	Wall Time	Overhead	Samples	vs Fastest
🐘 Postgres	🥇 Nitro	0.668s (-31.0% 🟢)	1.030s (-17.4% 🟢)	0.000s (-100.0% 🟢)	1.050s (-16.5% 🟢)	0.382s	58	1.00x
🐘 Postgres	Express	0.677s (-29.6% 🟢)	1.048s (-18.0% 🟢)	0.000s (+61.4% 🔺)	1.062s (-18.7% 🟢)	0.385s	57	1.01x
🐘 Postgres	Next.js (Turbopack)	0.740s	1.054s	0.000s	1.061s	0.321s	57	1.11x
💻 Local	Nitro	1.200s (-1.9%)	1.949s (-3.5%)	0.000s (-3.2%)	1.951s (-3.5%)	0.751s	31	1.80x
💻 Local	Express	1.418s (+15.8% 🔺)	2.015s (~)	0.000s (-10.0% 🟢)	2.018s (~)	0.599s	30	2.12x
💻 Local	Next.js (Turbopack)	1.466s	2.014s	0.000s	2.017s	0.551s	30	2.19x

▲ Production (Vercel)

World	Framework	Workflow Time	TTFB	Slurp	Wall Time	Overhead	Samples	vs Fastest
▲ Vercel	🥇 Next.js (Turbopack)	3.511s (-65.5% 🟢)	4.793s (-58.4% 🟢)	0.000s (+Infinity% 🔺)	5.254s (-56.4% 🟢)	1.743s	12	1.00x
▲ Vercel	Express	3.737s (~)	5.237s (+2.6%)	0.000s (-100.0% 🟢)	5.748s (+3.9%)	2.010s	11	1.06x
▲ Vercel	Nitro	3.863s (+26.6% 🔺)	4.866s (+10.8% 🔺)	0.000s (+8.3% 🔺)	5.270s (+9.6% 🔺)	1.407s	12	1.10x

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

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

💻 Local Development

World	Framework	Workflow Time	TTFB	Slurp	Wall Time	Overhead	Samples	vs Fastest
🐘 Postgres	🥇 Express	1.263s (-28.7% 🟢)	2.030s (-6.8% 🟢)	0.000s (+Infinity% 🔺)	2.044s (-7.0% 🟢)	0.782s	30	1.00x
🐘 Postgres	Nitro	1.291s (-27.9% 🟢)	1.996s (-6.8% 🟢)	0.000s (-6.7% 🟢)	2.009s (-7.6% 🟢)	0.718s	30	1.02x
🐘 Postgres	Next.js (Turbopack)	1.537s	2.145s	0.000s	2.163s	0.626s	28	1.22x
💻 Local	Nitro	2.712s (-19.9% 🟢)	3.177s (-21.2% 🟢)	0.001s (+12.5% 🔺)	3.180s (-21.2% 🟢)	0.469s	20	2.15x
💻 Local	Next.js (Turbopack)	2.854s	3.360s	0.001s	3.369s	0.515s	18	2.26x
💻 Local	Express	3.204s (-7.6% 🟢)	3.904s (-3.2%)	0.000s (-53.1% 🟢)	3.908s (-3.2%)	0.703s	16	2.54x

▲ Production (Vercel)

World	Framework	Workflow Time	TTFB	Slurp	Wall Time	Overhead	Samples	vs Fastest
▲ Vercel	🥇 Next.js (Turbopack)	5.529s (-1.6%)	7.214s (+3.3%)	0.000s (+100.0% 🔺)	7.685s (+1.9%)	2.156s	8	1.00x
▲ Vercel	Nitro	5.684s (+38.8% 🔺)	6.718s (+25.0% 🔺)	0.000s (-100.0% 🟢)	7.140s (+23.2% 🔺)	1.457s	9	1.03x
▲ Vercel	Express	5.959s (+29.9% 🔺)	7.576s (+25.8% 🔺)	0.000s (NaN%)	8.049s (+24.7% 🔺)	2.090s	8	1.08x

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

Summary

Fastest Framework by World

Winner determined by most benchmark wins

World	🥇 Fastest Framework	Wins
💻 Local	Nitro	18/21
🐘 Postgres	Nitro	16/21
▲ Vercel	Nitro	8/21

Fastest World by Framework

Winner determined by most benchmark wins

Framework	🥇 Fastest World	Wins
Express	🐘 Postgres	16/21
Next.js (Turbopack)	🐘 Postgres	15/21
Nitro	🐘 Postgres	13/21

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)
🌐 Redis: Community world (local development)
🌐 Redis + BullMQ: Community world (local development)
🌐 Cloudflare: Community world (local development)
🌐 MySQL: Community world (local development)
🌐 Azure: Community world (local development)
🌐 NATS JetStream: Community world (local development)
🌐 Upstash: Community world (local development)

📋 View full workflow run

github-actions · 2026-05-26T14:47:56Z

🧪 E2E Test Results

❌ Some tests failed

Summary

	Passed	Failed	Skipped	Total
❌ ▲ Vercel Production	1221	1	219	1441
✅ 💻 Local Development	1615	0	219	1834
✅ 📦 Local Production	1615	0	219	1834
✅ 🐘 Local Postgres	1615	0	219	1834
✅ 🪟 Windows	131	0	0	131
✅ 📋 Other	741	0	176	917
Total	6938	1	1052	7991

❌ Failed Tests

▲ Vercel Production (1 failed)

nitro (1 failed):

AbortController abortFromStepWorkflow: step abort cancels an in-flight sibling step

Details by Category

❌ ▲ Vercel Production

App	Passed	Failed	Skipped
✅ astro	105	0	26
✅ example	105	0	26
✅ express	105	0	26
✅ fastify	105	0	26
✅ hono	105	0	26
✅ nextjs-turbopack	129	0	2
✅ nextjs-webpack	129	0	2
❌ nitro	104	1	26
✅ nuxt	105	0	26
✅ sveltekit	124	0	7
✅ vite	105	0	26

✅ 💻 Local Development

App	Passed	Skipped
✅ astro-stable	106	25
✅ express-stable	106	25
✅ fastify-stable	106	25
✅ hono-stable	106	25
✅ nextjs-turbopack-canary	112	19
✅ nextjs-turbopack-stable-lazy-discovery-disabled	131	0
✅ nextjs-turbopack-stable-lazy-discovery-enabled	131	0
✅ nextjs-webpack-canary	112	19
✅ nextjs-webpack-stable-lazy-discovery-disabled	131	0
✅ nextjs-webpack-stable-lazy-discovery-enabled	131	0
✅ nitro-stable	106	25
✅ nuxt-stable	106	25
✅ sveltekit-stable	125	6
✅ vite-stable	106	25

✅ 📦 Local Production

App	Passed	Skipped
✅ astro-stable	106	25
✅ express-stable	106	25
✅ fastify-stable	106	25
✅ hono-stable	106	25
✅ nextjs-turbopack-canary	112	19
✅ nextjs-turbopack-stable-lazy-discovery-disabled	131	0
✅ nextjs-turbopack-stable-lazy-discovery-enabled	131	0
✅ nextjs-webpack-canary	112	19
✅ nextjs-webpack-stable-lazy-discovery-disabled	131	0
✅ nextjs-webpack-stable-lazy-discovery-enabled	131	0
✅ nitro-stable	106	25
✅ nuxt-stable	106	25
✅ sveltekit-stable	125	6
✅ vite-stable	106	25

✅ 🐘 Local Postgres

App	Passed	Skipped
✅ astro-stable	106	25
✅ express-stable	106	25
✅ fastify-stable	106	25
✅ hono-stable	106	25
✅ nextjs-turbopack-canary	112	19
✅ nextjs-turbopack-stable-lazy-discovery-disabled	131	0
✅ nextjs-turbopack-stable-lazy-discovery-enabled	131	0
✅ nextjs-webpack-canary	112	19
✅ nextjs-webpack-stable-lazy-discovery-disabled	131	0
✅ nextjs-webpack-stable-lazy-discovery-enabled	131	0
✅ nitro-stable	106	25
✅ nuxt-stable	106	25
✅ sveltekit-stable	125	6
✅ vite-stable	106	25

✅ 🪟 Windows

App	Passed	Failed	Skipped
✅ nextjs-turbopack	131	0	0

✅ 📋 Other

App	Passed	Skipped
✅ e2e-local-dev-nest-stable	106	25
✅ e2e-local-dev-tanstack-start-	106	25
✅ e2e-local-postgres-nest-stable	106	25
✅ e2e-local-postgres-tanstack-start-	106	25
✅ e2e-local-prod-nest-stable	106	25
✅ e2e-local-prod-tanstack-start-	106	25
✅ e2e-vercel-prod-tanstack-start	105	26

📋 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.

vercel · 2026-05-26T14:48:02Z

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

Project	Deployment	Actions	Updated (UTC)
example-nextjs-workflow-turbopack	Ready	Preview, Comment	May 26, 2026 2:51pm
example-nextjs-workflow-webpack	Ready	Preview, Comment	May 26, 2026 2:51pm
example-workflow	Ready	Preview, Comment	May 26, 2026 2:51pm
workbench-astro-workflow	Ready	Preview, Comment	May 26, 2026 2:51pm
workbench-express-workflow	Ready	Preview, Comment	May 26, 2026 2:51pm
workbench-fastify-workflow	Ready	Preview, Comment	May 26, 2026 2:51pm
workbench-hono-workflow	Ready	Preview, Comment	May 26, 2026 2:51pm
workbench-nitro-workflow	Ready	Preview, Comment	May 26, 2026 2:51pm
workbench-nuxt-workflow	Ready	Preview, Comment	May 26, 2026 2:51pm
workbench-sveltekit-workflow	Ready	Preview, Comment	May 26, 2026 2:51pm
workbench-tanstack-start-workflow	Ready	Preview, Comment	May 26, 2026 2:51pm
workbench-vite-workflow	Ready	Preview, Comment	May 26, 2026 2:51pm
workflow-swc-playground	Ready	Preview, Comment	May 26, 2026 2:51pm
workflow-tarballs	Ready	Preview, Comment	May 26, 2026 2:51pm
workflow-web	Ready	Preview, Comment	May 26, 2026 2:51pm

ijjk · 2026-05-26T16:24:24Z

    }

+    if (phase === 'phase-development-server') {
+      const dashboardUrl = await ensureDashboardServer().catch(


next.config can be loaded multiple times so would be good to have an env check like the process.env.WORKFLOW_NEXT_PRIVATE_BUILT above to ensure we only start this server once.

feat(next): add /_workflow web ui during dev

cdfbc6e

Adds a `/_workflow` redirect during `next dev` that boots the `@workflow/web` observability dashboard on a random port and redirects the browser to it. Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

VaguelySerious requested review from a team and ijjk as code owners May 26, 2026 14:47

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ijjk reviewed May 26, 2026

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VaguelySerious commented May 26, 2026

Test plan

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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)

💻 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)

Summary

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🧪 E2E Test Results

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❌ Failed Tests

Details by Category

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