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Node.js streams: Add forkpoint for createCombinedPayloadStream#92511

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Node.js streams: Add forkpoint for createCombinedPayloadStream#92511
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04-08-node.js_streams_add_forkpoint_for_createcombinedpayloadstream

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@timneutkens timneutkens commented Apr 8, 2026 •
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Building on top of the changes in #92252. This PR implements similar fork points for createCombinedPayloadStream

@nextjs-bot nextjs-bot added created-by: Turbopack team PRs by the Turbopack team. type: next labels Apr 8, 2026
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timneutkens commented Apr 8, 2026 •
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Stats from current PR

🔴 1 regression

Metric Canary PR Change Trend
node_modules Size 489 MB 491 MB 🔴 +1.34 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:

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  • 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) 446ms 447ms ✓ ▁▂▅▇▄
Cold (First Request) 1.122s 1.122s ✓ ▆▁▁▂▂
Warm (Listen) 457ms 457ms ✓ █▁██▁
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📦 Dev Server (Webpack) (Legacy)

📦 Dev Server (Webpack)

Metric Canary PR Change Trend
Cold (Listen) 456ms 456ms ✓ ▁▁▅▁▅
Cold (Ready in log) 442ms 440ms ✓ ▁▃▆▂▂
Cold (First Request) 1.891s 1.879s ✓ ▇▇▇▆▁
Warm (Listen) 456ms 456ms ✓ ▁▁▁▁▁
Warm (Ready in log) 441ms 441ms ✓ ▁▂▅▁▂
Warm (First Request) 1.886s 1.902s ✓ ▆▇█▆▁

⚡ Production Builds

Metric Canary PR Change Trend
Fresh Build 3.944s 3.929s ✓ ▇▆██▁
Cached Build 3.910s 3.924s ✓ ▄███▄
📦 Production Builds (Webpack) (Legacy)

📦 Production Builds (Webpack)

Metric Canary PR Change Trend
Fresh Build 14.596s 14.610s ✓ ▁▂▅▂▂
Cached Build 14.719s 14.722s ✓ ▁▂▇▃▄
node_modules Size 489 MB 491 MB 🔴 +1.34 MB (+0%) █████
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Canary PR Change
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Server

Edge SSR
Canary PR Change
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📝 Changed Files (8 files)

Files with changes:

  • app-page-exp..ntime.dev.js
  • app-page-exp..time.prod.js
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  • app-page-tur..time.prod.js
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📎 Tarball URL 
https://vercel-packages.vercel.app/next/commits/50f0d1dd01c40dbfa320098207394320c6767092/next

@timneutkens timneutkens force-pushed the 04-08-node.js_streams_add_forkpoint_for_createcombinedpayloadstream branch from e0669c2 to 50f0d1d Compare April 8, 2026 17:50
@timneutkens timneutkens force-pushed the 04-08-node.js_streams_add_forkpoint_for_logmessagesandsenderrorstobrowser branch from 499111d to 49bc4cc Compare April 8, 2026 17:50
@timneutkens timneutkens mentioned this pull request Apr 8, 2026
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@timneutkens timneutkens requested a review from gnoff April 9, 2026 09:01
@timneutkens timneutkens marked this pull request as ready for review April 9, 2026 09:01
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