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unstubbable merged 1 commit into from
Jan 8, 2026
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[test] Add a failing test for cycle serialization in segment prefetches #88287

unstubbable merged 1 commit into from
Jan 8, 2026
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@unstubbable unstubbable commented Jan 8, 2026

Requires a fix in React to pass (possibly facebook/react#35471).

closes #86401

@nextjs-bot nextjs-bot added created-by: Next.js team PRs by the Next.js team. tests labels Jan 8, 2026
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nextjs-bot commented Jan 8, 2026

Stats from current PR

✅ No significant changes detected

📊 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) 455ms 455ms ✓ █▁▁▁▁
Cold (First Request) 1.144s 1.176s ✓ ▂█▇▇█
Warm (Listen) 457ms 456ms ✓ ██▁██
Warm (First Request) 336ms 334ms ✓ █▁▁▄▂
📦 Dev Server (Webpack) (Legacy)

📦 Dev Server (Webpack)

Metric Canary PR Change Trend
Cold (Listen) 456ms 455ms ✓ █▁▁▁▁
Cold (First Request) 1.807s 1.811s ✓ ▆▆▆▁▇
Warm (Listen) 456ms 456ms ✓ ▅▅▅▁▅
Warm (First Request) 1.804s 1.831s ✓ ▇▆▅▁▆

⚡ Production Builds

Metric Canary PR Change Trend
Fresh Build 4.072s 4.011s ✓ █▁▁▁▃
Cached Build 4.061s 4.078s ✓ █▁▂▁▅
📦 Production Builds (Webpack) (Legacy)

📦 Production Builds (Webpack)

Metric Canary PR Change Trend
Fresh Build 13.821s 13.815s ✓ ▂▂▁▁▂
Cached Build 14.010s 14.029s ✓ ▃▂▁▁▃
node_modules Size 458 MB 458 MB ✓ █████
📦 Bundle Sizes

Bundle Sizes

⚡ Turbopack

Client

Main Bundles: **431 kB** → **431 kB** ✅ -15 B

82 files with content-based hashes (individual files not comparable between builds)

Server

Middleware
Canary PR Change
middleware-b..fest.js gzip 788 B 787 B ✓
Total 788 B 787 B ✅ -1 B
Build Details
Build Manifests
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_buildManifest.js gzip 450 B 450 B ✓
Total 450 B 450 B ✓

📦 Webpack

Client

Main Bundles
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2161-HASH.js gzip 5.4 kB N/A -
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Canary PR Change
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Pages
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Server

Edge SSR
Canary PR Change
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Middleware
Canary PR Change
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Canary PR Change
_buildManifest.js gzip 738 B 738 B ✓
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Build Cache
Canary PR Change
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index.pack gzip 98.7 kB 99.7 kB 🔴 +1 kB (+1%)
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🔄 Shared (bundler-independent)

Runtimes
Canary PR Change
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@unstubbable unstubbable marked this pull request as ready for review January 8, 2026 18:54
@unstubbable unstubbable requested a review from ztanner January 8, 2026 19:05
@unstubbable unstubbable merged commit a6b2d2e into canary Jan 8, 2026
161 checks passed
@unstubbable unstubbable deleted the hl/segment-cache-cycle-test branch January 8, 2026 20:06
pablofdezr pushed a commit to pablofdezr/next.js that referenced this pull request Jan 8, 2026
@unstubbable @pablofdezr
[test] Add a failing test for cycle serialization in segment prefetch…
804eb4f 
…es (vercel#88287)
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