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Adding more system info to the 'initialize project' trace#92427

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Adding more system info to the 'initialize project' trace#92427
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imm/trace-metadata

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@andrewimm andrewimm commented Apr 6, 2026

Improving debug info for trace files, adding:

  • OS
  • CPU Arch
  • Node version
  • number of cores

As well as whether the trace represents dev vs build mode.

@andrewimm andrewimm requested a review from a team April 6, 2026 22:24
@nextjs-bot nextjs-bot added created-by: Turbopack team PRs by the Turbopack team. Turbopack Related to Turbopack with Next.js. labels Apr 6, 2026
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Failing test suites

Commit: a230e9a | About building and testing Next.js

pnpm test-dev-turbo test/e2e/app-dir/instant-navigation-testing-api/instant-navigation-testing-api.test.ts (turbopack) (job)

  • instant-navigation-testing-api > runtime params are excluded from instant shell > does not include cookie values in instant shell during page load (DD)
Expand output

● instant-navigation-testing-api › runtime params are excluded from instant shell › does not include cookie values in instant shell during page load

expect(received).toContain(expected) // indexOf

Expected substring: "testCookie: hello"
Received string:    "testCookie: not set"

  411 |       const cookieValue = page.locator('[data-testid="cookie-value"]')
  412 |       await cookieValue.waitFor({ state: 'visible', timeout: 10000 })
> 413 |       expect(await cookieValue.textContent()).toContain('testCookie: hello')
      |                                               ^
  414 |     })
  415 |
  416 |     it('does not include dynamic param values in instant shell during page load', async () => {

  at Object.toContain (e2e/app-dir/instant-navigation-testing-api/instant-navigation-testing-api.test.ts:413:47)

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codspeed-hq bot commented Apr 6, 2026

Merging this PR will not alter performance

✅ 17 untouched benchmarks
⏩ 3 skipped benchmarks1


Comparing imm/trace-metadata (a230e9a) with canary (cd5d221)

Open in CodSpeed

Footnotes

  1. 3 benchmarks were skipped, so the baseline results were used instead. If they were deleted from the codebase, click here and archive them to remove them from the performance reports.

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Stats from current PR

🟢 1 improvement

Metric Canary PR Change Trend
node_modules Size 488 MB 485 MB 🟢 2.2 MB (0%) █████
📊 All Metrics
📖 Metrics Glossary

Dev Server Metrics:

  • Listen = TCP port starts accepting connections
  • First Request = HTTP server returns successful response
  • Cold = Fresh build (no cache)
  • Warm = With cached build artifacts

Build Metrics:

  • Fresh = Clean build (no .next directory)
  • Cached = With existing .next directory

Change Thresholds:

  • Time: Changes < 50ms AND < 10%, OR < 2% are insignificant
  • Size: Changes < 1KB AND < 1% are insignificant
  • All other changes are flagged to catch regressions

⚡ Dev Server

Metric Canary PR Change Trend
Cold (Listen) 456ms 455ms ▅▁█▅▅
Cold (Ready in log) 441ms 435ms ▂▁▂▅▇
Cold (First Request) 1.119s 1.124s █▆▁▁▂
Warm (Listen) 456ms 456ms ██▁██
Warm (Ready in log) 439ms 438ms ▁▂▂▇█
Warm (First Request) 336ms 340ms ▁▃▄▇█
📦 Dev Server (Webpack) (Legacy)

📦 Dev Server (Webpack)

Metric Canary PR Change Trend
Cold (Listen) 455ms 455ms ▆▃▃▆▃
Cold (Ready in log) 434ms 434ms ▂▁▃▆▂
Cold (First Request) 1.917s 1.907s ▆▇▇▇▆
Warm (Listen) 455ms 455ms ▁▁▁▁▁
Warm (Ready in log) 434ms 434ms ▃▁▂▅▁
Warm (First Request) 1.940s 1.936s ▆▆▇█▆

⚡ Production Builds

Metric Canary PR Change Trend
Fresh Build 3.873s 3.812s ▅▇▆██
Cached Build 3.956s 3.903s ▇▅███
📦 Production Builds (Webpack) (Legacy)

📦 Production Builds (Webpack)

Metric Canary PR Change Trend
Fresh Build 14.253s 14.251s ▁▁▂▅▂
Cached Build 14.468s 14.453s ▂▁▂▇▃
node_modules Size 488 MB 485 MB 🟢 2.2 MB (0%) █████
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📝 Changed Files (25 files)

Files with changes:

  • app-page-exp..ntime.dev.js
  • app-page-exp..time.prod.js
  • app-page-tur..ntime.dev.js
  • app-page-tur..time.prod.js
  • app-page-tur..ntime.dev.js
  • app-page-tur..time.prod.js
  • app-page.runtime.dev.js
  • app-page.runtime.prod.js
  • app-route-ex..ntime.dev.js
  • app-route-ex..time.prod.js
  • app-route-tu..ntime.dev.js
  • app-route-tu..time.prod.js
  • app-route-tu..ntime.dev.js
  • app-route-tu..time.prod.js
  • app-route.runtime.dev.js
  • app-route.ru..time.prod.js
  • pages-api-tu..ntime.dev.js
  • pages-api-tu..time.prod.js
  • pages-api.runtime.dev.js
  • pages-api.ru..time.prod.js
  • ... and 5 more
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📎 Tarball URL
https://vercel-packages.vercel.app/next/commits/612ee7259e283408dc5d296ecde1639e53620951/next

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