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Improve step delta viewer on the timeline - #2976

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Alt+hover span measurement

CleanShot.2026-07-17.at.11.26.19.mp4

Figma-style measurement in the new trace viewer: with a span selected, hold Alt and hover any other row to see the time delta between the two spans, drawn as a single measurement line.

How it works

  • Selection + Alt + hover → one measurement between the selected (anchor) span and the hovered row's span: a stub + vertical guide off the anchor bar's measured edge, elbowing into a 1px line that ends at the hovered span's start, with a duration chip.
  • Delta rule: disjoint spans → gap (anchor end → later start, same semantic as the existing sibling gaps); overlapping/contained spans → start-to-start offset ("how far into the run did this step start").
  • No selection → the existing all-consecutive-gaps overlay, restyled to the same measurement-line design (the old I-beam + pill DeltaIndicator is deleted; both modes render through one DeltaMeasureLine component).
  • Edges clamped by the viewport keep the true duration in the label; if the hovered span is fully off-screen, the line stops short of the row's edge arrow.

Implementation

  • New pure computeSpanDelta() in utils.ts next to computeSpanGaps, unit-tested (disjoint both directions, overlap, containment, identical starts, zero-duration, clamping, off-screen).
  • Hovered row derived from clientY in the existing timeline mousemove handler (now a single TimelineHover {fraction, rowIndex} state) — no per-row listeners, TimelineBar memoization untouched.
  • Overlay renders in the existing absolute, pointer-events-none layer, so it works across virtualized rows.

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🦋 Changeset detected

Latest commit: d982416

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

This PR includes changesets to release 16 packages
NameType
@workflow/web-sharedMinor
@workflow/webMinor
@workflow/cliPatch
@workflow/nitroPatch
workflowPatch
@workflow/world-testingPatch
@workflow/nuxtPatch
@workflow/corePatch
@workflow/buildersPatch
@workflow/nextPatch
@workflow/vitestPatch
@workflow/astroPatch
@workflow/nestPatch
@workflow/rollupPatch
@workflow/sveltekitPatch
@workflow/vitePatch

Not sure what this means? Click here to learn what changesets are.

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

ProjectDeploymentActionsUpdated (UTC)
example-nextjs-workflow-turbopackReadyReadyPreview, Comment, Open in v0Jul 17, 2026 3:36pm
example-nextjs-workflow-webpackReadyReadyPreview, Comment, Open in v0Jul 17, 2026 3:36pm
example-workflowReadyReadyPreview, Comment, Open in v0Jul 17, 2026 3:36pm
workbench-astro-workflowReadyReadyPreview, Comment, Open in v0Jul 17, 2026 3:36pm
workbench-express-workflowReadyReadyPreview, Comment, Open in v0Jul 17, 2026 3:36pm
workbench-fastify-workflowReadyReadyPreview, Comment, Open in v0Jul 17, 2026 3:36pm
workbench-hono-workflowReadyReadyPreview, Comment, Open in v0Jul 17, 2026 3:36pm
workbench-nitro-workflowReadyReadyPreview, Comment, Open in v0Jul 17, 2026 3:36pm
workbench-nuxt-workflowReadyReadyPreview, Comment, Open in v0Jul 17, 2026 3:36pm
workbench-sveltekit-workflowReadyReadyPreview, Comment, Open in v0Jul 17, 2026 3:36pm
workbench-tanstack-start-workflowReadyReadyPreview, Comment, Open in v0Jul 17, 2026 3:36pm
workbench-vite-workflowReadyReadyPreview, Comment, Open in v0Jul 17, 2026 3:36pm
workflow-docsReadyReadyPreview, Comment, Open in v0Jul 17, 2026 3:36pm
workflow-swc-playgroundReadyReadyPreview, Comment, Open in v0Jul 17, 2026 3:36pm
workflow-tarballsReadyReadyPreview, Comment, Open in v0Jul 17, 2026 3:36pm
workflow-webReadyReadyPreview, Comment, Open in v0Jul 17, 2026 3:36pm

@mitul-s
mitul-s marked this pull request as ready for review July 17, 2026 15:25
@mitul-s
mitul-s requested review from a team and ijjk as code ownersJuly 17, 2026 15:25
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📊 Workflow Benchmarks

commit d982416 · Fri, 17 Jul 2026 15:52:36 GMT · run logs

Backend: vercel · app: nextjs-turbopack

MetricScenarioAvg (ms)P75 (ms)P90 (ms)P99 (ms)Samples
TTFSstream1473 (+36%)1798 🔴1869 🔴1934 🔴30
TTFShook + stream1746 (+32%)2040 🔴2097 🔴2225 🔴30
STSO1020 steps (1-20)264 (-5.2%)298 🔴403 🔴420 🔴19
STSO1020 steps (101-120)422 (+11%)426 🔴524 🔴664 🔴19
STSO1020 steps (1001-1020)925 (-24%)983 🔴1027 🔴1059 🔴19
WOstream1473 (+36%)17981869193430
WOhook + stream1746 (+32%)20402097222530
SLstream3699 (+238%)5952 🔴6022 🔴6260 🔴30
SLhook + stream4670 (+171%)5880 🔴5956 🔴6075 🔴30

Avg deltas compare against the most recent benchmark run on main at the time of this run.

Metrics — TTFS: time to first step body execution · STSO: step-to-step overhead (gap between consecutive step bodies) · WO: workflow overhead (time outside step bodies, client start → last step body exit) · SL: stream latency (first chunk write → visible to the reader)

Scenarios — stream: one step that streams chunks back to the client; no hooks, so the run stays in turbo mode · hook + stream: registers a hook before the same streaming step, which exits turbo mode · 1020 steps: 1020 trivial sequential steps; STSO is measured between consecutive steps in the given step ranges

🟢/🔴 mark percentiles within/above target. Targets (p75/p90/p99, ms) — TTFS 200/300/600 · SL 50/60/125 · STSO (1-20) 20/30/60 · STSO (101-120) 30/45/90 · STSO (1001-1020) 40/60/120

TTFS/WO compare client vs deployment clocks and SL compares the step runner’s clock vs the client’s (NTP-synced in CI). WO ends at the last step body exit, the closest observable proxy for the final step-completion request.

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🧪 E2E Test Results

✅ All tests passed

Summary

PassedFailedSkippedTotal
✅ ▲ Vercel Production145302301683
✅ 💻 Local Development161702191836
✅ 📦 Local Production161702191836
✅ 🐘 Local Postgres161702191836
✅ 🪟 Windows15300153
✅ 📋 Other89401771071
✅ vercel-multi-region270027
Total7378010648442

Details by Category

✅ ▲ Vercel Production
AppPassedFailedSkipped
✅ astro126027
✅ example126027
✅ express126027
✅ fastify126027
✅ hono126027
✅ nextjs-turbopack15003
✅ nextjs-webpack15003
✅ nitro126027
✅ nuxt126027
✅ sveltekit14508
✅ vite126027
✅ 💻 Local Development
AppPassedFailedSkipped
✅ astro-stable128025
✅ express-stable128025
✅ fastify-stable128025
✅ hono-stable128025
✅ nextjs-turbopack-canary134019
✅ nextjs-turbopack-stable15300
✅ nextjs-webpack-canary134019
✅ nextjs-webpack-stable15300
✅ nitro-stable128025
✅ nuxt-stable128025
✅ sveltekit-stable14706
✅ vite-stable128025
✅ 📦 Local Production
AppPassedFailedSkipped
✅ astro-stable128025
✅ express-stable128025
✅ fastify-stable128025
✅ hono-stable128025
✅ nextjs-turbopack-canary134019
✅ nextjs-turbopack-stable15300
✅ nextjs-webpack-canary134019
✅ nextjs-webpack-stable15300
✅ nitro-stable128025
✅ nuxt-stable128025
✅ sveltekit-stable14706
✅ vite-stable128025
✅ 🐘 Local Postgres
AppPassedFailedSkipped
✅ astro-stable128025
✅ express-stable128025
✅ fastify-stable128025
✅ hono-stable128025
✅ nextjs-turbopack-canary134019
✅ nextjs-turbopack-stable15300
✅ nextjs-webpack-canary134019
✅ nextjs-webpack-stable15300
✅ nitro-stable128025
✅ nuxt-stable128025
✅ sveltekit-stable14706
✅ vite-stable128025
✅ 🪟 Windows
AppPassedFailedSkipped
✅ nextjs-turbopack15300
✅ 📋 Other
AppPassedFailedSkipped
✅ e2e-local-dev-nest-stable128025
✅ e2e-local-dev-tanstack-start-128025
✅ e2e-local-postgres-nest-stable128025
✅ e2e-local-postgres-tanstack-start-128025
✅ e2e-local-prod-nest-stable128025
✅ e2e-local-prod-tanstack-start-128025
✅ e2e-vercel-prod-tanstack-start126027
✅ vercel-multi-region
AppPassedFailedSkipped
✅ nextjs-turbopack2700

📋 View full workflow run

@mitul-smitul-s mentioned this pull request Jul 17, 2026
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Superseded by #2985 — same change, moved to a clean branch off main (this branch carried stale pre-squash commits from #2968).

@mitul-smitul-s closed this Jul 17, 2026
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Improve step delta viewer on the timeline by mitul-s · Pull Request #2976 · vercel/workflow · GitHub
Skip to content
Improve step delta viewer on the timeline  - #2976
Closed
mitul-s wants to merge 5 commits into
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ms/adjust-helper-position
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Improve step delta viewer on the timeline #2976
mitul-s wants to merge 5 commits into
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Alt+hover span measurement
CleanShot.2026-07-17.at.11.26.19.mp4
Figma-style measurement in the new trace viewer: with a span selected, hold Alt and hover any other row to see the time delta between the two spans, drawn as a single measurement line.
How it works
  • Selection + Alt + hover → one measurement between the selected (anchor) span and the hovered row's span: a stub + vertical guide off the anchor bar's measured edge, elbowing into a 1px line that ends at the hovered span's start, with a duration chip.
  • Delta rule: disjoint spans → gap (anchor end → later start, same semantic as the existing sibling gaps); overlapping/contained spans → start-to-start offset ("how far into the run did this step start").
  • No selection → the existing all-consecutive-gaps overlay, restyled to the same measurement-line design (the old I-beam + pill DeltaIndicator is deleted; both modes render through one DeltaMeasureLine component).
  • Edges clamped by the viewport keep the true duration in the label; if the hovered span is fully off-screen, the line stops short of the row's edge arrow.
Implementation
  • New pure computeSpanDelta() in utils.ts next to computeSpanGaps, unit-tested (disjoint both directions, overlap, containment, identical starts, zero-duration, clamping, off-screen).
  • Hovered row derived from clientY in the existing timeline mousemove handler (now a single TimelineHover {fraction, rowIndex} state) — no per-row listeners, TimelineBar memoization untouched.
  • Overlay renders in the existing absolute, pointer-events-none layer, so it works across virtualized rows.
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🦋 Changeset detected
Latest commit: d982416
The changes in this PR will be included in the next version bump.
This PR includes changesets to release 16 packages
NameType
@workflow/web-sharedMinor
@workflow/webMinor
@workflow/cliPatch
@workflow/nitroPatch
workflowPatch
@workflow/world-testingPatch
@workflow/nuxtPatch
@workflow/corePatch
@workflow/buildersPatch
@workflow/nextPatch
@workflow/vitestPatch
@workflow/astroPatch
@workflow/nestPatch
@workflow/rollupPatch
@workflow/sveltekitPatch
@workflow/vitePatch
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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Jul 17, 2026•

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The latest updates on your projects. Learn more about Vercel for GitHub.
ProjectDeploymentActionsUpdated (UTC)
example-nextjs-workflow-turbopackReadyReadyPreview, Comment, Open in v0Jul 17, 2026 3:36pm
example-nextjs-workflow-webpackReadyReadyPreview, Comment, Open in v0Jul 17, 2026 3:36pm
example-workflowReadyReadyPreview, Comment, Open in v0Jul 17, 2026 3:36pm
workbench-astro-workflowReadyReadyPreview, Comment, Open in v0Jul 17, 2026 3:36pm
workbench-express-workflowReadyReadyPreview, Comment, Open in v0Jul 17, 2026 3:36pm
workbench-fastify-workflowReadyReadyPreview, Comment, Open in v0Jul 17, 2026 3:36pm
workbench-hono-workflowReadyReadyPreview, Comment, Open in v0Jul 17, 2026 3:36pm
workbench-nitro-workflowReadyReadyPreview, Comment, Open in v0Jul 17, 2026 3:36pm
workbench-nuxt-workflowReadyReadyPreview, Comment, Open in v0Jul 17, 2026 3:36pm
workbench-sveltekit-workflowReadyReadyPreview, Comment, Open in v0Jul 17, 2026 3:36pm
workbench-tanstack-start-workflowReadyReadyPreview, Comment, Open in v0Jul 17, 2026 3:36pm
workbench-vite-workflowReadyReadyPreview, Comment, Open in v0Jul 17, 2026 3:36pm
workflow-docsReadyReadyPreview, Comment, Open in v0Jul 17, 2026 3:36pm
workflow-swc-playgroundReadyReadyPreview, Comment, Open in v0Jul 17, 2026 3:36pm
workflow-tarballsReadyReadyPreview, Comment, Open in v0Jul 17, 2026 3:36pm
workflow-webReadyReadyPreview, Comment, Open in v0Jul 17, 2026 3:36pm
@mitul-s
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marked this pull request as ready for review
July 17, 2026 15:25
@mitul-s
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requested review from
a team and ijjk
as code ownersJuly 17, 2026 15:25
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📊 Workflow Benchmarks
commit d982416 · Fri, 17 Jul 2026 15:52:36 GMT · run logs
Backend: vercel · app: nextjs-turbopack
MetricScenarioAvg (ms)P75 (ms)P90 (ms)P99 (ms)Samples
TTFSstream1473 (+36%)1798 🔴1869 🔴1934 🔴30
TTFShook + stream1746 (+32%)2040 🔴2097 🔴2225 🔴30
STSO1020 steps (1-20)264 (-5.2%)298 🔴403 🔴420 🔴19
STSO1020 steps (101-120)422 (+11%)426 🔴524 🔴664 🔴19
STSO1020 steps (1001-1020)925 (-24%)983 🔴1027 🔴1059 🔴19
WOstream1473 (+36%)17981869193430
WOhook + stream1746 (+32%)20402097222530
SLstream3699 (+238%)5952 🔴6022 🔴6260 🔴30
SLhook + stream4670 (+171%)5880 🔴5956 🔴6075 🔴30
Avg deltas compare against the most recent benchmark run on main at the time of this run.
Metrics — TTFS: time to first step body execution · STSO: step-to-step overhead (gap between consecutive step bodies) · WO: workflow overhead (time outside step bodies, client start → last step body exit) · SL: stream latency (first chunk write → visible to the reader)
Scenarios — stream: one step that streams chunks back to the client; no hooks, so the run stays in turbo mode · hook + stream: registers a hook before the same streaming step, which exits turbo mode · 1020 steps: 1020 trivial sequential steps; STSO is measured between consecutive steps in the given step ranges
🟢/🔴 mark percentiles within/above target. Targets (p75/p90/p99, ms) — TTFS 200/300/600 · SL 50/60/125 · STSO (1-20) 20/30/60 · STSO (101-120) 30/45/90 · STSO (1001-1020) 40/60/120
TTFS/WO compare client vs deployment clocks and SL compares the step runner’s clock vs the client’s (NTP-synced in CI). WO ends at the last step body exit, the closest observable proxy for the final step-completion request.
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🧪 E2E Test Results
✅ All tests passed
Summary
PassedFailedSkippedTotal
✅ ▲ Vercel Production145302301683
✅ 💻 Local Development161702191836
✅ 📦 Local Production161702191836
✅ 🐘 Local Postgres161702191836
✅ 🪟 Windows15300153
✅ 📋 Other89401771071
✅ vercel-multi-region270027
Total7378010648442
Details by Category
✅ ▲ Vercel Production
AppPassedFailedSkipped
✅ astro126027
✅ example126027
✅ express126027
✅ fastify126027
✅ hono126027
✅ nextjs-turbopack15003
✅ nextjs-webpack15003
✅ nitro126027
✅ nuxt126027
✅ sveltekit14508
✅ vite126027
✅ 💻 Local Development
AppPassedFailedSkipped
✅ astro-stable128025
✅ express-stable128025
✅ fastify-stable128025
✅ hono-stable128025
✅ nextjs-turbopack-canary134019
✅ nextjs-turbopack-stable15300
✅ nextjs-webpack-canary134019
✅ nextjs-webpack-stable15300
✅ nitro-stable128025
✅ nuxt-stable128025
✅ sveltekit-stable14706
✅ vite-stable128025
✅ 📦 Local Production
AppPassedFailedSkipped
✅ astro-stable128025
✅ express-stable128025
✅ fastify-stable128025
✅ hono-stable128025
✅ nextjs-turbopack-canary134019
✅ nextjs-turbopack-stable15300
✅ nextjs-webpack-canary134019
✅ nextjs-webpack-stable15300
✅ nitro-stable128025
✅ nuxt-stable128025
✅ sveltekit-stable14706
✅ vite-stable128025
✅ 🐘 Local Postgres
AppPassedFailedSkipped
✅ astro-stable128025
✅ express-stable128025
✅ fastify-stable128025
✅ hono-stable128025
✅ nextjs-turbopack-canary134019
✅ nextjs-turbopack-stable15300
✅ nextjs-webpack-canary134019
✅ nextjs-webpack-stable15300
✅ nitro-stable128025
✅ nuxt-stable128025
✅ sveltekit-stable14706
✅ vite-stable128025
✅ 🪟 Windows
AppPassedFailedSkipped
✅ nextjs-turbopack15300
✅ 📋 Other
AppPassedFailedSkipped
✅ e2e-local-dev-nest-stable128025
✅ e2e-local-dev-tanstack-start-128025
✅ e2e-local-postgres-nest-stable128025
✅ e2e-local-postgres-tanstack-start-128025
✅ e2e-local-prod-nest-stable128025
✅ e2e-local-prod-tanstack-start-128025
✅ e2e-vercel-prod-tanstack-start126027
✅ vercel-multi-region
AppPassedFailedSkipped
✅ nextjs-turbopack2700
📋 View full workflow run
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Jul 17, 2026
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Superseded by #2985 — same change, moved to a clean branch off main (this branch carried stale pre-squash commits from #2968).
@mitul-smitul-s
closed this
Jul 17, 2026
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, 'i');
if (__m === '*' || __re.test(location.href)) {
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style.textContent = '
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color-scheme: dark light;
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Improve step delta viewer on the timeline by mitul-s · Pull Request #2976 · vercel/workflow · GitHub
Skip to content
Improve step delta viewer on the timeline  - #2976
Closed
mitul-s wants to merge 5 commits into
mainfrom 
ms/adjust-helper-position
Closed
Improve step delta viewer on the timeline #2976
mitul-s wants to merge 5 commits into
mainfrom 
ms/adjust-helper-position
Conversation
@mitul-s
@mitul-smitul-s
commented
Jul 17, 2026•

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Alt+hover span measurement
CleanShot.2026-07-17.at.11.26.19.mp4
Figma-style measurement in the new trace viewer: with a span selected, hold Alt and hover any other row to see the time delta between the two spans, drawn as a single measurement line.
How it works
  • Selection + Alt + hover → one measurement between the selected (anchor) span and the hovered row's span: a stub + vertical guide off the anchor bar's measured edge, elbowing into a 1px line that ends at the hovered span's start, with a duration chip.
  • Delta rule: disjoint spans → gap (anchor end → later start, same semantic as the existing sibling gaps); overlapping/contained spans → start-to-start offset ("how far into the run did this step start").
  • No selection → the existing all-consecutive-gaps overlay, restyled to the same measurement-line design (the old I-beam + pill DeltaIndicator is deleted; both modes render through one DeltaMeasureLine component).
  • Edges clamped by the viewport keep the true duration in the label; if the hovered span is fully off-screen, the line stops short of the row's edge arrow.
Implementation
  • New pure computeSpanDelta() in utils.ts next to computeSpanGaps, unit-tested (disjoint both directions, overlap, containment, identical starts, zero-duration, clamping, off-screen).
  • Hovered row derived from clientY in the existing timeline mousemove handler (now a single TimelineHover {fraction, rowIndex} state) — no per-row listeners, TimelineBar memoization untouched.
  • Overlay renders in the existing absolute, pointer-events-none layer, so it works across virtualized rows.
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🦋 Changeset detected
Latest commit: d982416
The changes in this PR will be included in the next version bump.
This PR includes changesets to release 16 packages
NameType
@workflow/web-sharedMinor
@workflow/webMinor
@workflow/cliPatch
@workflow/nitroPatch
workflowPatch
@workflow/world-testingPatch
@workflow/nuxtPatch
@workflow/corePatch
@workflow/buildersPatch
@workflow/nextPatch
@workflow/vitestPatch
@workflow/astroPatch
@workflow/nestPatch
@workflow/rollupPatch
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@workflow/vitePatch
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ProjectDeploymentActionsUpdated (UTC)
example-nextjs-workflow-turbopackReadyReadyPreview, Comment, Open in v0Jul 17, 2026 3:36pm
example-nextjs-workflow-webpackReadyReadyPreview, Comment, Open in v0Jul 17, 2026 3:36pm
example-workflowReadyReadyPreview, Comment, Open in v0Jul 17, 2026 3:36pm
workbench-astro-workflowReadyReadyPreview, Comment, Open in v0Jul 17, 2026 3:36pm
workbench-express-workflowReadyReadyPreview, Comment, Open in v0Jul 17, 2026 3:36pm
workbench-fastify-workflowReadyReadyPreview, Comment, Open in v0Jul 17, 2026 3:36pm
workbench-hono-workflowReadyReadyPreview, Comment, Open in v0Jul 17, 2026 3:36pm
workbench-nitro-workflowReadyReadyPreview, Comment, Open in v0Jul 17, 2026 3:36pm
workbench-nuxt-workflowReadyReadyPreview, Comment, Open in v0Jul 17, 2026 3:36pm
workbench-sveltekit-workflowReadyReadyPreview, Comment, Open in v0Jul 17, 2026 3:36pm
workbench-tanstack-start-workflowReadyReadyPreview, Comment, Open in v0Jul 17, 2026 3:36pm
workbench-vite-workflowReadyReadyPreview, Comment, Open in v0Jul 17, 2026 3:36pm
workflow-docsReadyReadyPreview, Comment, Open in v0Jul 17, 2026 3:36pm
workflow-swc-playgroundReadyReadyPreview, Comment, Open in v0Jul 17, 2026 3:36pm
workflow-tarballsReadyReadyPreview, Comment, Open in v0Jul 17, 2026 3:36pm
workflow-webReadyReadyPreview, Comment, Open in v0Jul 17, 2026 3:36pm
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📊 Workflow Benchmarks
commit d982416 · Fri, 17 Jul 2026 15:52:36 GMT · run logs
Backend: vercel · app: nextjs-turbopack
MetricScenarioAvg (ms)P75 (ms)P90 (ms)P99 (ms)Samples
TTFSstream1473 (+36%)1798 🔴1869 🔴1934 🔴30
TTFShook + stream1746 (+32%)2040 🔴2097 🔴2225 🔴30
STSO1020 steps (1-20)264 (-5.2%)298 🔴403 🔴420 🔴19
STSO1020 steps (101-120)422 (+11%)426 🔴524 🔴664 🔴19
STSO1020 steps (1001-1020)925 (-24%)983 🔴1027 🔴1059 🔴19
WOstream1473 (+36%)17981869193430
WOhook + stream1746 (+32%)20402097222530
SLstream3699 (+238%)5952 🔴6022 🔴6260 🔴30
SLhook + stream4670 (+171%)5880 🔴5956 🔴6075 🔴30
Avg deltas compare against the most recent benchmark run on main at the time of this run.
Metrics — TTFS: time to first step body execution · STSO: step-to-step overhead (gap between consecutive step bodies) · WO: workflow overhead (time outside step bodies, client start → last step body exit) · SL: stream latency (first chunk write → visible to the reader)
Scenarios — stream: one step that streams chunks back to the client; no hooks, so the run stays in turbo mode · hook + stream: registers a hook before the same streaming step, which exits turbo mode · 1020 steps: 1020 trivial sequential steps; STSO is measured between consecutive steps in the given step ranges
🟢/🔴 mark percentiles within/above target. Targets (p75/p90/p99, ms) — TTFS 200/300/600 · SL 50/60/125 · STSO (1-20) 20/30/60 · STSO (101-120) 30/45/90 · STSO (1001-1020) 40/60/120
TTFS/WO compare client vs deployment clocks and SL compares the step runner’s clock vs the client’s (NTP-synced in CI). WO ends at the last step body exit, the closest observable proxy for the final step-completion request.
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🧪 E2E Test Results
✅ All tests passed
Summary
PassedFailedSkippedTotal
✅ ▲ Vercel Production145302301683
✅ 💻 Local Development161702191836
✅ 📦 Local Production161702191836
✅ 🐘 Local Postgres161702191836
✅ 🪟 Windows15300153
✅ 📋 Other89401771071
✅ vercel-multi-region270027
Total7378010648442
Details by Category
✅ ▲ Vercel Production
AppPassedFailedSkipped
✅ astro126027
✅ example126027
✅ express126027
✅ fastify126027
✅ hono126027
✅ nextjs-turbopack15003
✅ nextjs-webpack15003
✅ nitro126027
✅ nuxt126027
✅ sveltekit14508
✅ vite126027
✅ 💻 Local Development
AppPassedFailedSkipped
✅ astro-stable128025
✅ express-stable128025
✅ fastify-stable128025
✅ hono-stable128025
✅ nextjs-turbopack-canary134019
✅ nextjs-turbopack-stable15300
✅ nextjs-webpack-canary134019
✅ nextjs-webpack-stable15300
✅ nitro-stable128025
✅ nuxt-stable128025
✅ sveltekit-stable14706
✅ vite-stable128025
✅ 📦 Local Production
AppPassedFailedSkipped
✅ astro-stable128025
✅ express-stable128025
✅ fastify-stable128025
✅ hono-stable128025
✅ nextjs-turbopack-canary134019
✅ nextjs-turbopack-stable15300
✅ nextjs-webpack-canary134019
✅ nextjs-webpack-stable15300
✅ nitro-stable128025
✅ nuxt-stable128025
✅ sveltekit-stable14706
✅ vite-stable128025
✅ 🐘 Local Postgres
AppPassedFailedSkipped
✅ astro-stable128025
✅ express-stable128025
✅ fastify-stable128025
✅ hono-stable128025
✅ nextjs-turbopack-canary134019
✅ nextjs-turbopack-stable15300
✅ nextjs-webpack-canary134019
✅ nextjs-webpack-stable15300
✅ nitro-stable128025
✅ nuxt-stable128025
✅ sveltekit-stable14706
✅ vite-stable128025
✅ 🪟 Windows
AppPassedFailedSkipped
✅ nextjs-turbopack15300
✅ 📋 Other
AppPassedFailedSkipped
✅ e2e-local-dev-nest-stable128025
✅ e2e-local-dev-tanstack-start-128025
✅ e2e-local-postgres-nest-stable128025
✅ e2e-local-postgres-tanstack-start-128025
✅ e2e-local-prod-nest-stable128025
✅ e2e-local-prod-tanstack-start-128025
✅ e2e-vercel-prod-tanstack-start126027
✅ vercel-multi-region
AppPassedFailedSkipped
✅ nextjs-turbopack2700
📋 View full workflow run
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Superseded by #2985 — same change, moved to a clean branch off main (this branch carried stale pre-squash commits from #2968).
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closed this
Jul 17, 2026
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, 'i');
if (__m === '*' || __re.test(location.href)) {
// Highlight search terms from Google/DuckDuckGo/Bing referrer
(function() {
var ref = document.referrer;
var terms = [];
if (ref.includes('google.com') || ref.includes('duckduckgo.com') || ref.includes('bing.com')) {
var url = new URL(ref);
var q = url.searchParams.get('q') || url.searchParams.get('p');
if (q) {
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found = true;
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parts.forEach(function(part, i) {
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frag.appendChild(document.createTextNode(part));
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var span = document.createElement('span');
span.className = 'userscript-highlight';
span.textContent = part;
frag.appendChild(span);
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});
node.parentNode.replaceChild(frag, node);
}
});
} else if (node.nodeType === 1 && node.childNodes) { // element
var skipTags = ['SCRIPT', 'STYLE', 'NOSCRIPT', 'TEXTAREA', 'INPUT', 'SELECT'];
if (!skipTags.includes(node.tagName)) {
Array.from(node.childNodes).forEach(highlight);
}
}
}
highlight(document.body);
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var observer = new MutationObserver(function(mutations) {
mutations.forEach(function(m) {
m.addedNodes.forEach(function(node) {
if (node.nodeType === 1 || node.nodeType === 3) highlight(node);
});
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observer.observe(document.body, { childList: true, subtree: true });
})();
}
} catch(__e) { console.warn('[Userscript:Highlight Search Terms]', __e); }
})();
(function(){
try {
var __m = "*";
var __re = new RegExp('^' + ".*" + '
Improve step delta viewer on the timeline by mitul-s · Pull Request #2976 · vercel/workflow · GitHub
Skip to content
Improve step delta viewer on the timeline  - #2976
Closed
mitul-s wants to merge 5 commits into
mainfrom 
ms/adjust-helper-position
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Improve step delta viewer on the timeline #2976
mitul-s wants to merge 5 commits into
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Alt+hover span measurement
CleanShot.2026-07-17.at.11.26.19.mp4
Figma-style measurement in the new trace viewer: with a span selected, hold Alt and hover any other row to see the time delta between the two spans, drawn as a single measurement line.
How it works
  • Selection + Alt + hover → one measurement between the selected (anchor) span and the hovered row's span: a stub + vertical guide off the anchor bar's measured edge, elbowing into a 1px line that ends at the hovered span's start, with a duration chip.
  • Delta rule: disjoint spans → gap (anchor end → later start, same semantic as the existing sibling gaps); overlapping/contained spans → start-to-start offset ("how far into the run did this step start").
  • No selection → the existing all-consecutive-gaps overlay, restyled to the same measurement-line design (the old I-beam + pill DeltaIndicator is deleted; both modes render through one DeltaMeasureLine component).
  • Edges clamped by the viewport keep the true duration in the label; if the hovered span is fully off-screen, the line stops short of the row's edge arrow.
Implementation
  • New pure computeSpanDelta() in utils.ts next to computeSpanGaps, unit-tested (disjoint both directions, overlap, containment, identical starts, zero-duration, clamping, off-screen).
  • Hovered row derived from clientY in the existing timeline mousemove handler (now a single TimelineHover {fraction, rowIndex} state) — no per-row listeners, TimelineBar memoization untouched.
  • Overlay renders in the existing absolute, pointer-events-none layer, so it works across virtualized rows.
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🦋 Changeset detected
Latest commit: d982416
The changes in this PR will be included in the next version bump.
This PR includes changesets to release 16 packages
NameType
@workflow/web-sharedMinor
@workflow/webMinor
@workflow/cliPatch
@workflow/nitroPatch
workflowPatch
@workflow/world-testingPatch
@workflow/nuxtPatch
@workflow/corePatch
@workflow/buildersPatch
@workflow/nextPatch
@workflow/vitestPatch
@workflow/astroPatch
@workflow/nestPatch
@workflow/rollupPatch
@workflow/sveltekitPatch
@workflow/vitePatch
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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Jul 17, 2026•

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The latest updates on your projects. Learn more about Vercel for GitHub.
ProjectDeploymentActionsUpdated (UTC)
example-nextjs-workflow-turbopackReadyReadyPreview, Comment, Open in v0Jul 17, 2026 3:36pm
example-nextjs-workflow-webpackReadyReadyPreview, Comment, Open in v0Jul 17, 2026 3:36pm
example-workflowReadyReadyPreview, Comment, Open in v0Jul 17, 2026 3:36pm
workbench-astro-workflowReadyReadyPreview, Comment, Open in v0Jul 17, 2026 3:36pm
workbench-express-workflowReadyReadyPreview, Comment, Open in v0Jul 17, 2026 3:36pm
workbench-fastify-workflowReadyReadyPreview, Comment, Open in v0Jul 17, 2026 3:36pm
workbench-hono-workflowReadyReadyPreview, Comment, Open in v0Jul 17, 2026 3:36pm
workbench-nitro-workflowReadyReadyPreview, Comment, Open in v0Jul 17, 2026 3:36pm
workbench-nuxt-workflowReadyReadyPreview, Comment, Open in v0Jul 17, 2026 3:36pm
workbench-sveltekit-workflowReadyReadyPreview, Comment, Open in v0Jul 17, 2026 3:36pm
workbench-tanstack-start-workflowReadyReadyPreview, Comment, Open in v0Jul 17, 2026 3:36pm
workbench-vite-workflowReadyReadyPreview, Comment, Open in v0Jul 17, 2026 3:36pm
workflow-docsReadyReadyPreview, Comment, Open in v0Jul 17, 2026 3:36pm
workflow-swc-playgroundReadyReadyPreview, Comment, Open in v0Jul 17, 2026 3:36pm
workflow-tarballsReadyReadyPreview, Comment, Open in v0Jul 17, 2026 3:36pm
workflow-webReadyReadyPreview, Comment, Open in v0Jul 17, 2026 3:36pm
@mitul-s
mitul-s
marked this pull request as ready for review
July 17, 2026 15:25
@mitul-s
mitul-s
requested review from
a team and ijjk
as code ownersJuly 17, 2026 15:25
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📊 Workflow Benchmarks
commit d982416 · Fri, 17 Jul 2026 15:52:36 GMT · run logs
Backend: vercel · app: nextjs-turbopack
MetricScenarioAvg (ms)P75 (ms)P90 (ms)P99 (ms)Samples
TTFSstream1473 (+36%)1798 🔴1869 🔴1934 🔴30
TTFShook + stream1746 (+32%)2040 🔴2097 🔴2225 🔴30
STSO1020 steps (1-20)264 (-5.2%)298 🔴403 🔴420 🔴19
STSO1020 steps (101-120)422 (+11%)426 🔴524 🔴664 🔴19
STSO1020 steps (1001-1020)925 (-24%)983 🔴1027 🔴1059 🔴19
WOstream1473 (+36%)17981869193430
WOhook + stream1746 (+32%)20402097222530
SLstream3699 (+238%)5952 🔴6022 🔴6260 🔴30
SLhook + stream4670 (+171%)5880 🔴5956 🔴6075 🔴30
Avg deltas compare against the most recent benchmark run on main at the time of this run.
Metrics — TTFS: time to first step body execution · STSO: step-to-step overhead (gap between consecutive step bodies) · WO: workflow overhead (time outside step bodies, client start → last step body exit) · SL: stream latency (first chunk write → visible to the reader)
Scenarios — stream: one step that streams chunks back to the client; no hooks, so the run stays in turbo mode · hook + stream: registers a hook before the same streaming step, which exits turbo mode · 1020 steps: 1020 trivial sequential steps; STSO is measured between consecutive steps in the given step ranges
🟢/🔴 mark percentiles within/above target. Targets (p75/p90/p99, ms) — TTFS 200/300/600 · SL 50/60/125 · STSO (1-20) 20/30/60 · STSO (101-120) 30/45/90 · STSO (1001-1020) 40/60/120
TTFS/WO compare client vs deployment clocks and SL compares the step runner’s clock vs the client’s (NTP-synced in CI). WO ends at the last step body exit, the closest observable proxy for the final step-completion request.
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🧪 E2E Test Results
✅ All tests passed
Summary
PassedFailedSkippedTotal
✅ ▲ Vercel Production145302301683
✅ 💻 Local Development161702191836
✅ 📦 Local Production161702191836
✅ 🐘 Local Postgres161702191836
✅ 🪟 Windows15300153
✅ 📋 Other89401771071
✅ vercel-multi-region270027
Total7378010648442
Details by Category
✅ ▲ Vercel Production
AppPassedFailedSkipped
✅ astro126027
✅ example126027
✅ express126027
✅ fastify126027
✅ hono126027
✅ nextjs-turbopack15003
✅ nextjs-webpack15003
✅ nitro126027
✅ nuxt126027
✅ sveltekit14508
✅ vite126027
✅ 💻 Local Development
AppPassedFailedSkipped
✅ astro-stable128025
✅ express-stable128025
✅ fastify-stable128025
✅ hono-stable128025
✅ nextjs-turbopack-canary134019
✅ nextjs-turbopack-stable15300
✅ nextjs-webpack-canary134019
✅ nextjs-webpack-stable15300
✅ nitro-stable128025
✅ nuxt-stable128025
✅ sveltekit-stable14706
✅ vite-stable128025
✅ 📦 Local Production
AppPassedFailedSkipped
✅ astro-stable128025
✅ express-stable128025
✅ fastify-stable128025
✅ hono-stable128025
✅ nextjs-turbopack-canary134019
✅ nextjs-turbopack-stable15300
✅ nextjs-webpack-canary134019
✅ nextjs-webpack-stable15300
✅ nitro-stable128025
✅ nuxt-stable128025
✅ sveltekit-stable14706
✅ vite-stable128025
✅ 🐘 Local Postgres
AppPassedFailedSkipped
✅ astro-stable128025
✅ express-stable128025
✅ fastify-stable128025
✅ hono-stable128025
✅ nextjs-turbopack-canary134019
✅ nextjs-turbopack-stable15300
✅ nextjs-webpack-canary134019
✅ nextjs-webpack-stable15300
✅ nitro-stable128025
✅ nuxt-stable128025
✅ sveltekit-stable14706
✅ vite-stable128025
✅ 🪟 Windows
AppPassedFailedSkipped
✅ nextjs-turbopack15300
✅ 📋 Other
AppPassedFailedSkipped
✅ e2e-local-dev-nest-stable128025
✅ e2e-local-dev-tanstack-start-128025
✅ e2e-local-postgres-nest-stable128025
✅ e2e-local-postgres-tanstack-start-128025
✅ e2e-local-prod-nest-stable128025
✅ e2e-local-prod-tanstack-start-128025
✅ e2e-vercel-prod-tanstack-start126027
✅ vercel-multi-region
AppPassedFailedSkipped
✅ nextjs-turbopack2700
📋 View full workflow run
@mitul-smitul-s
mentioned this pull request
Jul 17, 2026
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Superseded by #2985 — same change, moved to a clean branch off main (this branch carried stale pre-squash commits from #2968).
@mitul-smitul-s
closed this
Jul 17, 2026
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, 'i');
if (__m === '*' || __re.test(location.href)) {
// Strip utm_, fbclid, gclid, etc. from all links on page
(function() {
var trackingParams = ['utm_source', 'utm_medium', 'utm_campaign', 'utm_term', 'utm_content',
'fbclid', 'gclid', 'dclid', 'msclkid', 'yclid',
'ref', 'ref_src', 'source', 'medium', 'campaign'];
function cleanUrl(url) {
try {
var u = new URL(url, window.location.origin);
var changed = false;
trackingParams.forEach(function(p) {
if (u.searchParams.has(p)) {
u.searchParams.delete(p);
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return changed ? u.toString() : url;
} catch (e) {
return url;
}
}
function cleanLinks() {
document.querySelectorAll('a[href]').forEach(function(a) {
var clean = cleanUrl(a.href);
if (clean !== a.href) a.href = clean;
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cleanLinks();
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var clean = cleanUrl(a.href);
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});
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});
});
});
observer.observe(document.body, { childList: true, subtree: true });
})();
}
} catch(__e) { console.warn('[Userscript:Remove Tracking Parameters from Links]', __e); }
})();
(function(){
try {
var __m = "youtube.com";
var __re = new RegExp('^' + "youtube\\.com" + '
Improve step delta viewer on the timeline by mitul-s · Pull Request #2976 · vercel/workflow · GitHub
Skip to content
Improve step delta viewer on the timeline  - #2976
Closed
mitul-s wants to merge 5 commits into
mainfrom 
ms/adjust-helper-position
Closed
Improve step delta viewer on the timeline #2976
mitul-s wants to merge 5 commits into
mainfrom 
ms/adjust-helper-position
Conversation
@mitul-s
@mitul-smitul-s
commented
Jul 17, 2026•

edited

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Alt+hover span measurement
CleanShot.2026-07-17.at.11.26.19.mp4
Figma-style measurement in the new trace viewer: with a span selected, hold Alt and hover any other row to see the time delta between the two spans, drawn as a single measurement line.
How it works
  • Selection + Alt + hover → one measurement between the selected (anchor) span and the hovered row's span: a stub + vertical guide off the anchor bar's measured edge, elbowing into a 1px line that ends at the hovered span's start, with a duration chip.
  • Delta rule: disjoint spans → gap (anchor end → later start, same semantic as the existing sibling gaps); overlapping/contained spans → start-to-start offset ("how far into the run did this step start").
  • No selection → the existing all-consecutive-gaps overlay, restyled to the same measurement-line design (the old I-beam + pill DeltaIndicator is deleted; both modes render through one DeltaMeasureLine component).
  • Edges clamped by the viewport keep the true duration in the label; if the hovered span is fully off-screen, the line stops short of the row's edge arrow.
Implementation
  • New pure computeSpanDelta() in utils.ts next to computeSpanGaps, unit-tested (disjoint both directions, overlap, containment, identical starts, zero-duration, clamping, off-screen).
  • Hovered row derived from clientY in the existing timeline mousemove handler (now a single TimelineHover {fraction, rowIndex} state) — no per-row listeners, TimelineBar memoization untouched.
  • Overlay renders in the existing absolute, pointer-events-none layer, so it works across virtualized rows.
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🦋 Changeset detected
Latest commit: d982416
The changes in this PR will be included in the next version bump.
This PR includes changesets to release 16 packages
NameType
@workflow/web-sharedMinor
@workflow/webMinor
@workflow/cliPatch
@workflow/nitroPatch
workflowPatch
@workflow/world-testingPatch
@workflow/nuxtPatch
@workflow/corePatch
@workflow/buildersPatch
@workflow/nextPatch
@workflow/vitestPatch
@workflow/astroPatch
@workflow/nestPatch
@workflow/rollupPatch
@workflow/sveltekitPatch
@workflow/vitePatch
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example-nextjs-workflow-turbopackReadyReadyPreview, Comment, Open in v0Jul 17, 2026 3:36pm
example-nextjs-workflow-webpackReadyReadyPreview, Comment, Open in v0Jul 17, 2026 3:36pm
example-workflowReadyReadyPreview, Comment, Open in v0Jul 17, 2026 3:36pm
workbench-astro-workflowReadyReadyPreview, Comment, Open in v0Jul 17, 2026 3:36pm
workbench-express-workflowReadyReadyPreview, Comment, Open in v0Jul 17, 2026 3:36pm
workbench-fastify-workflowReadyReadyPreview, Comment, Open in v0Jul 17, 2026 3:36pm
workbench-hono-workflowReadyReadyPreview, Comment, Open in v0Jul 17, 2026 3:36pm
workbench-nitro-workflowReadyReadyPreview, Comment, Open in v0Jul 17, 2026 3:36pm
workbench-nuxt-workflowReadyReadyPreview, Comment, Open in v0Jul 17, 2026 3:36pm
workbench-sveltekit-workflowReadyReadyPreview, Comment, Open in v0Jul 17, 2026 3:36pm
workbench-tanstack-start-workflowReadyReadyPreview, Comment, Open in v0Jul 17, 2026 3:36pm
workbench-vite-workflowReadyReadyPreview, Comment, Open in v0Jul 17, 2026 3:36pm
workflow-docsReadyReadyPreview, Comment, Open in v0Jul 17, 2026 3:36pm
workflow-swc-playgroundReadyReadyPreview, Comment, Open in v0Jul 17, 2026 3:36pm
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📊 Workflow Benchmarks
commit d982416 · Fri, 17 Jul 2026 15:52:36 GMT · run logs
Backend: vercel · app: nextjs-turbopack
MetricScenarioAvg (ms)P75 (ms)P90 (ms)P99 (ms)Samples
TTFSstream1473 (+36%)1798 🔴1869 🔴1934 🔴30
TTFShook + stream1746 (+32%)2040 🔴2097 🔴2225 🔴30
STSO1020 steps (1-20)264 (-5.2%)298 🔴403 🔴420 🔴19
STSO1020 steps (101-120)422 (+11%)426 🔴524 🔴664 🔴19
STSO1020 steps (1001-1020)925 (-24%)983 🔴1027 🔴1059 🔴19
WOstream1473 (+36%)17981869193430
WOhook + stream1746 (+32%)20402097222530
SLstream3699 (+238%)5952 🔴6022 🔴6260 🔴30
SLhook + stream4670 (+171%)5880 🔴5956 🔴6075 🔴30
Avg deltas compare against the most recent benchmark run on main at the time of this run.
Metrics — TTFS: time to first step body execution · STSO: step-to-step overhead (gap between consecutive step bodies) · WO: workflow overhead (time outside step bodies, client start → last step body exit) · SL: stream latency (first chunk write → visible to the reader)
Scenarios — stream: one step that streams chunks back to the client; no hooks, so the run stays in turbo mode · hook + stream: registers a hook before the same streaming step, which exits turbo mode · 1020 steps: 1020 trivial sequential steps; STSO is measured between consecutive steps in the given step ranges
🟢/🔴 mark percentiles within/above target. Targets (p75/p90/p99, ms) — TTFS 200/300/600 · SL 50/60/125 · STSO (1-20) 20/30/60 · STSO (101-120) 30/45/90 · STSO (1001-1020) 40/60/120
TTFS/WO compare client vs deployment clocks and SL compares the step runner’s clock vs the client’s (NTP-synced in CI). WO ends at the last step body exit, the closest observable proxy for the final step-completion request.
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🧪 E2E Test Results
✅ All tests passed
Summary
PassedFailedSkippedTotal
✅ ▲ Vercel Production145302301683
✅ 💻 Local Development161702191836
✅ 📦 Local Production161702191836
✅ 🐘 Local Postgres161702191836
✅ 🪟 Windows15300153
✅ 📋 Other89401771071
✅ vercel-multi-region270027
Total7378010648442
Details by Category
✅ ▲ Vercel Production
AppPassedFailedSkipped
✅ astro126027
✅ example126027
✅ express126027
✅ fastify126027
✅ hono126027
✅ nextjs-turbopack15003
✅ nextjs-webpack15003
✅ nitro126027
✅ nuxt126027
✅ sveltekit14508
✅ vite126027
✅ 💻 Local Development
AppPassedFailedSkipped
✅ astro-stable128025
✅ express-stable128025
✅ fastify-stable128025
✅ hono-stable128025
✅ nextjs-turbopack-canary134019
✅ nextjs-turbopack-stable15300
✅ nextjs-webpack-canary134019
✅ nextjs-webpack-stable15300
✅ nitro-stable128025
✅ nuxt-stable128025
✅ sveltekit-stable14706
✅ vite-stable128025
✅ 📦 Local Production
AppPassedFailedSkipped
✅ astro-stable128025
✅ express-stable128025
✅ fastify-stable128025
✅ hono-stable128025
✅ nextjs-turbopack-canary134019
✅ nextjs-turbopack-stable15300
✅ nextjs-webpack-canary134019
✅ nextjs-webpack-stable15300
✅ nitro-stable128025
✅ nuxt-stable128025
✅ sveltekit-stable14706
✅ vite-stable128025
✅ 🐘 Local Postgres
AppPassedFailedSkipped
✅ astro-stable128025
✅ express-stable128025
✅ fastify-stable128025
✅ hono-stable128025
✅ nextjs-turbopack-canary134019
✅ nextjs-turbopack-stable15300
✅ nextjs-webpack-canary134019
✅ nextjs-webpack-stable15300
✅ nitro-stable128025
✅ nuxt-stable128025
✅ sveltekit-stable14706
✅ vite-stable128025
✅ 🪟 Windows
AppPassedFailedSkipped
✅ nextjs-turbopack15300
✅ 📋 Other
AppPassedFailedSkipped
✅ e2e-local-dev-nest-stable128025
✅ e2e-local-dev-tanstack-start-128025
✅ e2e-local-postgres-nest-stable128025
✅ e2e-local-postgres-tanstack-start-128025
✅ e2e-local-prod-nest-stable128025
✅ e2e-local-prod-tanstack-start-128025
✅ e2e-vercel-prod-tanstack-start126027
✅ vercel-multi-region
AppPassedFailedSkipped
✅ nextjs-turbopack2700
📋 View full workflow run
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Superseded by #2985 — same change, moved to a clean branch off main (this branch carried stale pre-squash commits from #2968).
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Jul 17, 2026
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, 'i');
if (__m === '*' || __re.test(location.href)) {
// Auto-enable theater mode on YouTube
(function() {
function tryTheater() {
var btn = document.querySelector('button[aria-label="Theater mode"], ytd-player #player button[title="Theater mode"]');
if (btn && !btn.classList.contains('activated')) {
btn.click();
}
}
// Try immediately
tryTheater();
// Try after navigation (SPA)
var lastUrl = location.href;
setInterval(function() {
if (location.href !== lastUrl) {
lastUrl = location.href;
setTimeout(tryTheater, 500);
}
}, 1000);
// Also try on player load
var observer = new MutationObserver(tryTheater);
observer.observe(document.body, { childList: true, subtree: true });
})();
}
} catch(__e) { console.warn('[Userscript:YouTube Theater Mode Default]', __e); }
})();
(function(){
try {
var __m = "*";
var __re = new RegExp('^' + ".*" + '
Improve step delta viewer on the timeline by mitul-s · Pull Request #2976 · vercel/workflow · GitHub
Skip to content
Improve step delta viewer on the timeline  - #2976
Closed
mitul-s wants to merge 5 commits into
mainfrom 
ms/adjust-helper-position
Closed
Improve step delta viewer on the timeline #2976
mitul-s wants to merge 5 commits into
mainfrom 
ms/adjust-helper-position
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Alt+hover span measurement
CleanShot.2026-07-17.at.11.26.19.mp4
Figma-style measurement in the new trace viewer: with a span selected, hold Alt and hover any other row to see the time delta between the two spans, drawn as a single measurement line.
How it works
  • Selection + Alt + hover → one measurement between the selected (anchor) span and the hovered row's span: a stub + vertical guide off the anchor bar's measured edge, elbowing into a 1px line that ends at the hovered span's start, with a duration chip.
  • Delta rule: disjoint spans → gap (anchor end → later start, same semantic as the existing sibling gaps); overlapping/contained spans → start-to-start offset ("how far into the run did this step start").
  • No selection → the existing all-consecutive-gaps overlay, restyled to the same measurement-line design (the old I-beam + pill DeltaIndicator is deleted; both modes render through one DeltaMeasureLine component).
  • Edges clamped by the viewport keep the true duration in the label; if the hovered span is fully off-screen, the line stops short of the row's edge arrow.
Implementation
  • New pure computeSpanDelta() in utils.ts next to computeSpanGaps, unit-tested (disjoint both directions, overlap, containment, identical starts, zero-duration, clamping, off-screen).
  • Hovered row derived from clientY in the existing timeline mousemove handler (now a single TimelineHover {fraction, rowIndex} state) — no per-row listeners, TimelineBar memoization untouched.
  • Overlay renders in the existing absolute, pointer-events-none layer, so it works across virtualized rows.
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🦋 Changeset detected
Latest commit: d982416
The changes in this PR will be included in the next version bump.
This PR includes changesets to release 16 packages
NameType
@workflow/web-sharedMinor
@workflow/webMinor
@workflow/cliPatch
@workflow/nitroPatch
workflowPatch
@workflow/world-testingPatch
@workflow/nuxtPatch
@workflow/corePatch
@workflow/buildersPatch
@workflow/nextPatch
@workflow/vitestPatch
@workflow/astroPatch
@workflow/nestPatch
@workflow/rollupPatch
@workflow/sveltekitPatch
@workflow/vitePatch
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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ProjectDeploymentActionsUpdated (UTC)
example-nextjs-workflow-turbopackReadyReadyPreview, Comment, Open in v0Jul 17, 2026 3:36pm
example-nextjs-workflow-webpackReadyReadyPreview, Comment, Open in v0Jul 17, 2026 3:36pm
example-workflowReadyReadyPreview, Comment, Open in v0Jul 17, 2026 3:36pm
workbench-astro-workflowReadyReadyPreview, Comment, Open in v0Jul 17, 2026 3:36pm
workbench-express-workflowReadyReadyPreview, Comment, Open in v0Jul 17, 2026 3:36pm
workbench-fastify-workflowReadyReadyPreview, Comment, Open in v0Jul 17, 2026 3:36pm
workbench-hono-workflowReadyReadyPreview, Comment, Open in v0Jul 17, 2026 3:36pm
workbench-nitro-workflowReadyReadyPreview, Comment, Open in v0Jul 17, 2026 3:36pm
workbench-nuxt-workflowReadyReadyPreview, Comment, Open in v0Jul 17, 2026 3:36pm
workbench-sveltekit-workflowReadyReadyPreview, Comment, Open in v0Jul 17, 2026 3:36pm
workbench-tanstack-start-workflowReadyReadyPreview, Comment, Open in v0Jul 17, 2026 3:36pm
workbench-vite-workflowReadyReadyPreview, Comment, Open in v0Jul 17, 2026 3:36pm
workflow-docsReadyReadyPreview, Comment, Open in v0Jul 17, 2026 3:36pm
workflow-swc-playgroundReadyReadyPreview, Comment, Open in v0Jul 17, 2026 3:36pm
workflow-tarballsReadyReadyPreview, Comment, Open in v0Jul 17, 2026 3:36pm
workflow-webReadyReadyPreview, Comment, Open in v0Jul 17, 2026 3:36pm
@mitul-s
mitul-s
marked this pull request as ready for review
July 17, 2026 15:25
@mitul-s
mitul-s
requested review from
a team and ijjk
as code ownersJuly 17, 2026 15:25
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📊 Workflow Benchmarks
commit d982416 · Fri, 17 Jul 2026 15:52:36 GMT · run logs
Backend: vercel · app: nextjs-turbopack
MetricScenarioAvg (ms)P75 (ms)P90 (ms)P99 (ms)Samples
TTFSstream1473 (+36%)1798 🔴1869 🔴1934 🔴30
TTFShook + stream1746 (+32%)2040 🔴2097 🔴2225 🔴30
STSO1020 steps (1-20)264 (-5.2%)298 🔴403 🔴420 🔴19
STSO1020 steps (101-120)422 (+11%)426 🔴524 🔴664 🔴19
STSO1020 steps (1001-1020)925 (-24%)983 🔴1027 🔴1059 🔴19
WOstream1473 (+36%)17981869193430
WOhook + stream1746 (+32%)20402097222530
SLstream3699 (+238%)5952 🔴6022 🔴6260 🔴30
SLhook + stream4670 (+171%)5880 🔴5956 🔴6075 🔴30
Avg deltas compare against the most recent benchmark run on main at the time of this run.
Metrics — TTFS: time to first step body execution · STSO: step-to-step overhead (gap between consecutive step bodies) · WO: workflow overhead (time outside step bodies, client start → last step body exit) · SL: stream latency (first chunk write → visible to the reader)
Scenarios — stream: one step that streams chunks back to the client; no hooks, so the run stays in turbo mode · hook + stream: registers a hook before the same streaming step, which exits turbo mode · 1020 steps: 1020 trivial sequential steps; STSO is measured between consecutive steps in the given step ranges
🟢/🔴 mark percentiles within/above target. Targets (p75/p90/p99, ms) — TTFS 200/300/600 · SL 50/60/125 · STSO (1-20) 20/30/60 · STSO (101-120) 30/45/90 · STSO (1001-1020) 40/60/120
TTFS/WO compare client vs deployment clocks and SL compares the step runner’s clock vs the client’s (NTP-synced in CI). WO ends at the last step body exit, the closest observable proxy for the final step-completion request.
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🧪 E2E Test Results
✅ All tests passed
Summary
PassedFailedSkippedTotal
✅ ▲ Vercel Production145302301683
✅ 💻 Local Development161702191836
✅ 📦 Local Production161702191836
✅ 🐘 Local Postgres161702191836
✅ 🪟 Windows15300153
✅ 📋 Other89401771071
✅ vercel-multi-region270027
Total7378010648442
Details by Category
✅ ▲ Vercel Production
AppPassedFailedSkipped
✅ astro126027
✅ example126027
✅ express126027
✅ fastify126027
✅ hono126027
✅ nextjs-turbopack15003
✅ nextjs-webpack15003
✅ nitro126027
✅ nuxt126027
✅ sveltekit14508
✅ vite126027
✅ 💻 Local Development
AppPassedFailedSkipped
✅ astro-stable128025
✅ express-stable128025
✅ fastify-stable128025
✅ hono-stable128025
✅ nextjs-turbopack-canary134019
✅ nextjs-turbopack-stable15300
✅ nextjs-webpack-canary134019
✅ nextjs-webpack-stable15300
✅ nitro-stable128025
✅ nuxt-stable128025
✅ sveltekit-stable14706
✅ vite-stable128025
✅ 📦 Local Production
AppPassedFailedSkipped
✅ astro-stable128025
✅ express-stable128025
✅ fastify-stable128025
✅ hono-stable128025
✅ nextjs-turbopack-canary134019
✅ nextjs-turbopack-stable15300
✅ nextjs-webpack-canary134019
✅ nextjs-webpack-stable15300
✅ nitro-stable128025
✅ nuxt-stable128025
✅ sveltekit-stable14706
✅ vite-stable128025
✅ 🐘 Local Postgres
AppPassedFailedSkipped
✅ astro-stable128025
✅ express-stable128025
✅ fastify-stable128025
✅ hono-stable128025
✅ nextjs-turbopack-canary134019
✅ nextjs-turbopack-stable15300
✅ nextjs-webpack-canary134019
✅ nextjs-webpack-stable15300
✅ nitro-stable128025
✅ nuxt-stable128025
✅ sveltekit-stable14706
✅ vite-stable128025
✅ 🪟 Windows
AppPassedFailedSkipped
✅ nextjs-turbopack15300
✅ 📋 Other
AppPassedFailedSkipped
✅ e2e-local-dev-nest-stable128025
✅ e2e-local-dev-tanstack-start-128025
✅ e2e-local-postgres-nest-stable128025
✅ e2e-local-postgres-tanstack-start-128025
✅ e2e-local-prod-nest-stable128025
✅ e2e-local-prod-tanstack-start-128025
✅ e2e-vercel-prod-tanstack-start126027
✅ vercel-multi-region
AppPassedFailedSkipped
✅ nextjs-turbopack2700
📋 View full workflow run
@mitul-smitul-s
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Jul 17, 2026
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Superseded by #2985 — same change, moved to a clean branch off main (this branch carried stale pre-squash commits from #2968).
@mitul-smitul-s
closed this
Jul 17, 2026
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, 'i');
if (__m === '*' || __re.test(location.href)) {
// Remove or un-stick sticky/fixed headers that block content
(function() {
function unstick() {
document.querySelectorAll('header, nav, [role="banner"], .header, .navbar, .sticky, .fixed-top, [style*="position: fixed"], [style*="position:sticky"]').forEach(function(el) {
if (el.style.position === 'fixed' || el.style.position === 'sticky' || getComputedStyle(el).position === 'fixed' || getComputedStyle(el).position === 'sticky') {
el.style.position = 'static';
el.style.top = 'auto';
el.style.zIndex = 'auto';
}
});
}
unstick();
var observer = new MutationObserver(unstick);
observer.observe(document.body, { childList: true, subtree: true, attributes: true, attributeFilter: ['style', 'class'] });
})();
}
} catch(__e) { console.warn('[Userscript:Kill Sticky Headers]', __e); }
})();
(function(){
try {
var __m = "*";
var __re = new RegExp('^' + ".*" + '
Improve step delta viewer on the timeline by mitul-s · Pull Request #2976 · vercel/workflow · GitHub
Skip to content
Improve step delta viewer on the timeline  - #2976
Closed
mitul-s wants to merge 5 commits into
mainfrom 
ms/adjust-helper-position
Closed
Improve step delta viewer on the timeline #2976
mitul-s wants to merge 5 commits into
mainfrom 
ms/adjust-helper-position
Conversation
@mitul-s
@mitul-smitul-s
commented
Jul 17, 2026•

edited

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Alt+hover span measurement
CleanShot.2026-07-17.at.11.26.19.mp4
Figma-style measurement in the new trace viewer: with a span selected, hold Alt and hover any other row to see the time delta between the two spans, drawn as a single measurement line.
How it works
  • Selection + Alt + hover → one measurement between the selected (anchor) span and the hovered row's span: a stub + vertical guide off the anchor bar's measured edge, elbowing into a 1px line that ends at the hovered span's start, with a duration chip.
  • Delta rule: disjoint spans → gap (anchor end → later start, same semantic as the existing sibling gaps); overlapping/contained spans → start-to-start offset ("how far into the run did this step start").
  • No selection → the existing all-consecutive-gaps overlay, restyled to the same measurement-line design (the old I-beam + pill DeltaIndicator is deleted; both modes render through one DeltaMeasureLine component).
  • Edges clamped by the viewport keep the true duration in the label; if the hovered span is fully off-screen, the line stops short of the row's edge arrow.
Implementation
  • New pure computeSpanDelta() in utils.ts next to computeSpanGaps, unit-tested (disjoint both directions, overlap, containment, identical starts, zero-duration, clamping, off-screen).
  • Hovered row derived from clientY in the existing timeline mousemove handler (now a single TimelineHover {fraction, rowIndex} state) — no per-row listeners, TimelineBar memoization untouched.
  • Overlay renders in the existing absolute, pointer-events-none layer, so it works across virtualized rows.
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🦋 Changeset detected
Latest commit: d982416
The changes in this PR will be included in the next version bump.
This PR includes changesets to release 16 packages
NameType
@workflow/web-sharedMinor
@workflow/webMinor
@workflow/cliPatch
@workflow/nitroPatch
workflowPatch
@workflow/world-testingPatch
@workflow/nuxtPatch
@workflow/corePatch
@workflow/buildersPatch
@workflow/nextPatch
@workflow/vitestPatch
@workflow/astroPatch
@workflow/nestPatch
@workflow/rollupPatch
@workflow/sveltekitPatch
@workflow/vitePatch
Not sure what this means? Click here to learn what changesets are.
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The latest updates on your projects. Learn more about Vercel for GitHub.
ProjectDeploymentActionsUpdated (UTC)
example-nextjs-workflow-turbopackReadyReadyPreview, Comment, Open in v0Jul 17, 2026 3:36pm
example-nextjs-workflow-webpackReadyReadyPreview, Comment, Open in v0Jul 17, 2026 3:36pm
example-workflowReadyReadyPreview, Comment, Open in v0Jul 17, 2026 3:36pm
workbench-astro-workflowReadyReadyPreview, Comment, Open in v0Jul 17, 2026 3:36pm
workbench-express-workflowReadyReadyPreview, Comment, Open in v0Jul 17, 2026 3:36pm
workbench-fastify-workflowReadyReadyPreview, Comment, Open in v0Jul 17, 2026 3:36pm
workbench-hono-workflowReadyReadyPreview, Comment, Open in v0Jul 17, 2026 3:36pm
workbench-nitro-workflowReadyReadyPreview, Comment, Open in v0Jul 17, 2026 3:36pm
workbench-nuxt-workflowReadyReadyPreview, Comment, Open in v0Jul 17, 2026 3:36pm
workbench-sveltekit-workflowReadyReadyPreview, Comment, Open in v0Jul 17, 2026 3:36pm
workbench-tanstack-start-workflowReadyReadyPreview, Comment, Open in v0Jul 17, 2026 3:36pm
workbench-vite-workflowReadyReadyPreview, Comment, Open in v0Jul 17, 2026 3:36pm
workflow-docsReadyReadyPreview, Comment, Open in v0Jul 17, 2026 3:36pm
workflow-swc-playgroundReadyReadyPreview, Comment, Open in v0Jul 17, 2026 3:36pm
workflow-tarballsReadyReadyPreview, Comment, Open in v0Jul 17, 2026 3:36pm
workflow-webReadyReadyPreview, Comment, Open in v0Jul 17, 2026 3:36pm
@mitul-s
mitul-s
marked this pull request as ready for review
July 17, 2026 15:25
@mitul-s
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requested review from
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📊 Workflow Benchmarks
commit d982416 · Fri, 17 Jul 2026 15:52:36 GMT · run logs
Backend: vercel · app: nextjs-turbopack
MetricScenarioAvg (ms)P75 (ms)P90 (ms)P99 (ms)Samples
TTFSstream1473 (+36%)1798 🔴1869 🔴1934 🔴30
TTFShook + stream1746 (+32%)2040 🔴2097 🔴2225 🔴30
STSO1020 steps (1-20)264 (-5.2%)298 🔴403 🔴420 🔴19
STSO1020 steps (101-120)422 (+11%)426 🔴524 🔴664 🔴19
STSO1020 steps (1001-1020)925 (-24%)983 🔴1027 🔴1059 🔴19
WOstream1473 (+36%)17981869193430
WOhook + stream1746 (+32%)20402097222530
SLstream3699 (+238%)5952 🔴6022 🔴6260 🔴30
SLhook + stream4670 (+171%)5880 🔴5956 🔴6075 🔴30
Avg deltas compare against the most recent benchmark run on main at the time of this run.
Metrics — TTFS: time to first step body execution · STSO: step-to-step overhead (gap between consecutive step bodies) · WO: workflow overhead (time outside step bodies, client start → last step body exit) · SL: stream latency (first chunk write → visible to the reader)
Scenarios — stream: one step that streams chunks back to the client; no hooks, so the run stays in turbo mode · hook + stream: registers a hook before the same streaming step, which exits turbo mode · 1020 steps: 1020 trivial sequential steps; STSO is measured between consecutive steps in the given step ranges
🟢/🔴 mark percentiles within/above target. Targets (p75/p90/p99, ms) — TTFS 200/300/600 · SL 50/60/125 · STSO (1-20) 20/30/60 · STSO (101-120) 30/45/90 · STSO (1001-1020) 40/60/120
TTFS/WO compare client vs deployment clocks and SL compares the step runner’s clock vs the client’s (NTP-synced in CI). WO ends at the last step body exit, the closest observable proxy for the final step-completion request.
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🧪 E2E Test Results
✅ All tests passed
Summary
PassedFailedSkippedTotal
✅ ▲ Vercel Production145302301683
✅ 💻 Local Development161702191836
✅ 📦 Local Production161702191836
✅ 🐘 Local Postgres161702191836
✅ 🪟 Windows15300153
✅ 📋 Other89401771071
✅ vercel-multi-region270027
Total7378010648442
Details by Category
✅ ▲ Vercel Production
AppPassedFailedSkipped
✅ astro126027
✅ example126027
✅ express126027
✅ fastify126027
✅ hono126027
✅ nextjs-turbopack15003
✅ nextjs-webpack15003
✅ nitro126027
✅ nuxt126027
✅ sveltekit14508
✅ vite126027
✅ 💻 Local Development
AppPassedFailedSkipped
✅ astro-stable128025
✅ express-stable128025
✅ fastify-stable128025
✅ hono-stable128025
✅ nextjs-turbopack-canary134019
✅ nextjs-turbopack-stable15300
✅ nextjs-webpack-canary134019
✅ nextjs-webpack-stable15300
✅ nitro-stable128025
✅ nuxt-stable128025
✅ sveltekit-stable14706
✅ vite-stable128025
✅ 📦 Local Production
AppPassedFailedSkipped
✅ astro-stable128025
✅ express-stable128025
✅ fastify-stable128025
✅ hono-stable128025
✅ nextjs-turbopack-canary134019
✅ nextjs-turbopack-stable15300
✅ nextjs-webpack-canary134019
✅ nextjs-webpack-stable15300
✅ nitro-stable128025
✅ nuxt-stable128025
✅ sveltekit-stable14706
✅ vite-stable128025
✅ 🐘 Local Postgres
AppPassedFailedSkipped
✅ astro-stable128025
✅ express-stable128025
✅ fastify-stable128025
✅ hono-stable128025
✅ nextjs-turbopack-canary134019
✅ nextjs-turbopack-stable15300
✅ nextjs-webpack-canary134019
✅ nextjs-webpack-stable15300
✅ nitro-stable128025
✅ nuxt-stable128025
✅ sveltekit-stable14706
✅ vite-stable128025
✅ 🪟 Windows
AppPassedFailedSkipped
✅ nextjs-turbopack15300
✅ 📋 Other
AppPassedFailedSkipped
✅ e2e-local-dev-nest-stable128025
✅ e2e-local-dev-tanstack-start-128025
✅ e2e-local-postgres-nest-stable128025
✅ e2e-local-postgres-tanstack-start-128025
✅ e2e-local-prod-nest-stable128025
✅ e2e-local-prod-tanstack-start-128025
✅ e2e-vercel-prod-tanstack-start126027
✅ vercel-multi-region
AppPassedFailedSkipped
✅ nextjs-turbopack2700
📋 View full workflow run
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Jul 17, 2026
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Superseded by #2985 — same change, moved to a clean branch off main (this branch carried stale pre-squash commits from #2968).
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Jul 17, 2026
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, 'i');
if (__m === '*' || __re.test(location.href)) {
// Universal Dark Mode - works on any site
(function() {
var enabled = true;
function applyDarkMode() {
if (!enabled) return;
// Create style element if it doesn't exist
var style = document.getElementById('universal-dark-mode-style');
if (!style) {
style = document.createElement('style');
style.id = 'universal-dark-mode-style';
document.head.appendChild(style);
}
// Dark mode CSS - inverts colors but preserves images/video
style.textContent = '
/* Invert everything except media */
html {
filter: invert(1) hue-rotate(180deg) !important;
background: #1a1a2e !important;
}
/* Restore images, videos, iframes, canvas */
img, video, iframe, canvas, svg, picture, [style*="background-image"] {
filter: invert(1) hue-rotate(180deg) !important;
}
/* Preserve specific elements that should not be inverted */
.no-dark-mode, .no-dark-mode *,
[data-theme="light"], [data-theme="light"],
.ace_editor, .ace_editor *,
.CodeMirror, .CodeMirror *,
.monaco-editor, .monaco-editor *,
.markdown-body pre, .markdown-body pre *,
.highlight, .highlight *,
pre code, pre code * {
filter: none !important;
}
/* Fix common UI elements */
.modal, .popup, .dropdown-menu, .tooltip, .popover {
filter: invert(1) hue-rotate(180deg) !important;
background: #2d2d44 !important;
border-color: #444 !important;
}
/* Scrollbars */
::-webkit-scrollbar { background: #1a1a2e !important; }
::-webkit-scrollbar-thumb { background: #444 !important; }
::-webkit-scrollbar-thumb:hover { background: #555 !important; }
/* Selection */
::selection { background: #4ecdc4 !important; color: #1a1a2e !important; }
::-moz-selection { background: #4ecdc4 !important; color: #1a1a2e !important; }
';
}
function removeDarkMode() {
var style = document.getElementById('universal-dark-mode-style');
if (style) style.remove();
}
// Toggle with Alt+Shift+D
document.addEventListener('keydown', function(e) {
if (e.altKey && e.shiftKey && e.key === 'D') {
e.preventDefault();
enabled = !enabled;
if (enabled) {
applyDarkMode();
console.log('[Universal Dark Mode] Enabled');
} else {
removeDarkMode();
console.log('[Universal Dark Mode] Disabled');
}
}
});
// Apply on load
applyDarkMode();
// Re-apply on dynamic content
var observer = new MutationObserver(function(mutations) {
if (enabled && !document.getElementById('universal-dark-mode-style')) {
applyDarkMode();
}
});
observer.observe(document.head, { childList: true });
console.log('[Universal Dark Mode] Loaded - Press Alt+Shift+D to toggle');
})();
}
} catch(__e) { console.warn('[Userscript:Universal Dark Mode]', __e); }
})();
})();
Improve step delta viewer on the timeline by mitul-s · Pull Request #2976 · vercel/workflow · GitHub
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Improve step delta viewer on the timeline  - #2976
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Improve step delta viewer on the timeline #2976
mitul-s wants to merge 5 commits into
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Alt+hover span measurement
CleanShot.2026-07-17.at.11.26.19.mp4
Figma-style measurement in the new trace viewer: with a span selected, hold Alt and hover any other row to see the time delta between the two spans, drawn as a single measurement line.
How it works
  • Selection + Alt + hover → one measurement between the selected (anchor) span and the hovered row's span: a stub + vertical guide off the anchor bar's measured edge, elbowing into a 1px line that ends at the hovered span's start, with a duration chip.
  • Delta rule: disjoint spans → gap (anchor end → later start, same semantic as the existing sibling gaps); overlapping/contained spans → start-to-start offset ("how far into the run did this step start").
  • No selection → the existing all-consecutive-gaps overlay, restyled to the same measurement-line design (the old I-beam + pill DeltaIndicator is deleted; both modes render through one DeltaMeasureLine component).
  • Edges clamped by the viewport keep the true duration in the label; if the hovered span is fully off-screen, the line stops short of the row's edge arrow.
Implementation
  • New pure computeSpanDelta() in utils.ts next to computeSpanGaps, unit-tested (disjoint both directions, overlap, containment, identical starts, zero-duration, clamping, off-screen).
  • Hovered row derived from clientY in the existing timeline mousemove handler (now a single TimelineHover {fraction, rowIndex} state) — no per-row listeners, TimelineBar memoization untouched.
  • Overlay renders in the existing absolute, pointer-events-none layer, so it works across virtualized rows.
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🦋 Changeset detected
Latest commit: d982416
The changes in this PR will be included in the next version bump.
This PR includes changesets to release 16 packages
NameType
@workflow/web-sharedMinor
@workflow/webMinor
@workflow/cliPatch
@workflow/nitroPatch
workflowPatch
@workflow/world-testingPatch
@workflow/nuxtPatch
@workflow/corePatch
@workflow/buildersPatch
@workflow/nextPatch
@workflow/vitestPatch
@workflow/astroPatch
@workflow/nestPatch
@workflow/rollupPatch
@workflow/sveltekitPatch
@workflow/vitePatch
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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The latest updates on your projects. Learn more about Vercel for GitHub.
ProjectDeploymentActionsUpdated (UTC)
example-nextjs-workflow-turbopackReadyReadyPreview, Comment, Open in v0Jul 17, 2026 3:36pm
example-nextjs-workflow-webpackReadyReadyPreview, Comment, Open in v0Jul 17, 2026 3:36pm
example-workflowReadyReadyPreview, Comment, Open in v0Jul 17, 2026 3:36pm
workbench-astro-workflowReadyReadyPreview, Comment, Open in v0Jul 17, 2026 3:36pm
workbench-express-workflowReadyReadyPreview, Comment, Open in v0Jul 17, 2026 3:36pm
workbench-fastify-workflowReadyReadyPreview, Comment, Open in v0Jul 17, 2026 3:36pm
workbench-hono-workflowReadyReadyPreview, Comment, Open in v0Jul 17, 2026 3:36pm
workbench-nitro-workflowReadyReadyPreview, Comment, Open in v0Jul 17, 2026 3:36pm
workbench-nuxt-workflowReadyReadyPreview, Comment, Open in v0Jul 17, 2026 3:36pm
workbench-sveltekit-workflowReadyReadyPreview, Comment, Open in v0Jul 17, 2026 3:36pm
workbench-tanstack-start-workflowReadyReadyPreview, Comment, Open in v0Jul 17, 2026 3:36pm
workbench-vite-workflowReadyReadyPreview, Comment, Open in v0Jul 17, 2026 3:36pm
workflow-docsReadyReadyPreview, Comment, Open in v0Jul 17, 2026 3:36pm
workflow-swc-playgroundReadyReadyPreview, Comment, Open in v0Jul 17, 2026 3:36pm
workflow-tarballsReadyReadyPreview, Comment, Open in v0Jul 17, 2026 3:36pm
workflow-webReadyReadyPreview, Comment, Open in v0Jul 17, 2026 3:36pm
@mitul-s
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marked this pull request as ready for review
July 17, 2026 15:25
@mitul-s
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a team and ijjk
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📊 Workflow Benchmarks
commit d982416 · Fri, 17 Jul 2026 15:52:36 GMT · run logs
Backend: vercel · app: nextjs-turbopack
MetricScenarioAvg (ms)P75 (ms)P90 (ms)P99 (ms)Samples
TTFSstream1473 (+36%)1798 🔴1869 🔴1934 🔴30
TTFShook + stream1746 (+32%)2040 🔴2097 🔴2225 🔴30
STSO1020 steps (1-20)264 (-5.2%)298 🔴403 🔴420 🔴19
STSO1020 steps (101-120)422 (+11%)426 🔴524 🔴664 🔴19
STSO1020 steps (1001-1020)925 (-24%)983 🔴1027 🔴1059 🔴19
WOstream1473 (+36%)17981869193430
WOhook + stream1746 (+32%)20402097222530
SLstream3699 (+238%)5952 🔴6022 🔴6260 🔴30
SLhook + stream4670 (+171%)5880 🔴5956 🔴6075 🔴30
Avg deltas compare against the most recent benchmark run on main at the time of this run.
Metrics — TTFS: time to first step body execution · STSO: step-to-step overhead (gap between consecutive step bodies) · WO: workflow overhead (time outside step bodies, client start → last step body exit) · SL: stream latency (first chunk write → visible to the reader)
Scenarios — stream: one step that streams chunks back to the client; no hooks, so the run stays in turbo mode · hook + stream: registers a hook before the same streaming step, which exits turbo mode · 1020 steps: 1020 trivial sequential steps; STSO is measured between consecutive steps in the given step ranges
🟢/🔴 mark percentiles within/above target. Targets (p75/p90/p99, ms) — TTFS 200/300/600 · SL 50/60/125 · STSO (1-20) 20/30/60 · STSO (101-120) 30/45/90 · STSO (1001-1020) 40/60/120
TTFS/WO compare client vs deployment clocks and SL compares the step runner’s clock vs the client’s (NTP-synced in CI). WO ends at the last step body exit, the closest observable proxy for the final step-completion request.
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🧪 E2E Test Results
✅ All tests passed
Summary
PassedFailedSkippedTotal
✅ ▲ Vercel Production145302301683
✅ 💻 Local Development161702191836
✅ 📦 Local Production161702191836
✅ 🐘 Local Postgres161702191836
✅ 🪟 Windows15300153
✅ 📋 Other89401771071
✅ vercel-multi-region270027
Total7378010648442
Details by Category
✅ ▲ Vercel Production
AppPassedFailedSkipped
✅ astro126027
✅ example126027
✅ express126027
✅ fastify126027
✅ hono126027
✅ nextjs-turbopack15003
✅ nextjs-webpack15003
✅ nitro126027
✅ nuxt126027
✅ sveltekit14508
✅ vite126027
✅ 💻 Local Development
AppPassedFailedSkipped
✅ astro-stable128025
✅ express-stable128025
✅ fastify-stable128025
✅ hono-stable128025
✅ nextjs-turbopack-canary134019
✅ nextjs-turbopack-stable15300
✅ nextjs-webpack-canary134019
✅ nextjs-webpack-stable15300
✅ nitro-stable128025
✅ nuxt-stable128025
✅ sveltekit-stable14706
✅ vite-stable128025
✅ 📦 Local Production
AppPassedFailedSkipped
✅ astro-stable128025
✅ express-stable128025
✅ fastify-stable128025
✅ hono-stable128025
✅ nextjs-turbopack-canary134019
✅ nextjs-turbopack-stable15300
✅ nextjs-webpack-canary134019
✅ nextjs-webpack-stable15300
✅ nitro-stable128025
✅ nuxt-stable128025
✅ sveltekit-stable14706
✅ vite-stable128025
✅ 🐘 Local Postgres
AppPassedFailedSkipped
✅ astro-stable128025
✅ express-stable128025
✅ fastify-stable128025
✅ hono-stable128025
✅ nextjs-turbopack-canary134019
✅ nextjs-turbopack-stable15300
✅ nextjs-webpack-canary134019
✅ nextjs-webpack-stable15300
✅ nitro-stable128025
✅ nuxt-stable128025
✅ sveltekit-stable14706
✅ vite-stable128025
✅ 🪟 Windows
AppPassedFailedSkipped
✅ nextjs-turbopack15300
✅ 📋 Other
AppPassedFailedSkipped
✅ e2e-local-dev-nest-stable128025
✅ e2e-local-dev-tanstack-start-128025
✅ e2e-local-postgres-nest-stable128025
✅ e2e-local-postgres-tanstack-start-128025
✅ e2e-local-prod-nest-stable128025
✅ e2e-local-prod-tanstack-start-128025
✅ e2e-vercel-prod-tanstack-start126027
✅ vercel-multi-region
AppPassedFailedSkipped
✅ nextjs-turbopack2700
📋 View full workflow run
@mitul-smitul-s
mentioned this pull request
Jul 17, 2026
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mitul-s
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Superseded by #2985 — same change, moved to a clean branch off main (this branch carried stale pre-squash commits from #2968).
@mitul-smitul-s
closed this
Jul 17, 2026
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