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fix(incremental-cache): byte-exact fetch cache key for binary bodies - #96008

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Stats from current PR

🔴 2 regressions

Metric Canary PR Change Trend
node_modules Size 516 MB 517 MB 🔴 +384 kB (+0%) ████▁
Webpack Build Time 24.900s 25.543s 🔴 +643ms (+3%) ▂▁▁▁▁
📊 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) 813ms 812ms ✓ ▂▂▂█▁
Cold (Ready in log) 796ms 790ms ✓ ▁▁▁█▁
Cold (First Request) 1.355s 1.349s ✓ ▁▁▁█▁
Warm (Listen) 813ms 813ms ✓ ▂▂▂█▂
Warm (Ready in log) 790ms 789ms ✓ ▁▁▁█▁
Warm (First Request) 1.347s 1.320s ✓ ▁▁▁█▁
📦 Dev Server (Webpack) (Legacy)

📦 Dev Server (Webpack)

Metric Canary PR Change Trend
Cold (Listen) 811ms 813ms ✓ ▂▁▁▂▂
Cold (Ready in log) 772ms 784ms ✓ ▂▁▁▁▁
Cold (First Request) 3.350s 3.426s ✓ ▂▁▁▁▁
Warm (Listen) 812ms 810ms ✓ ▂▁▁▂▂
Warm (Ready in log) 774ms 774ms ✓ ▂▁▁▁▁
Warm (First Request) 3.367s 3.371s ✓ ▂▁▁▂▂

⚡ Production Builds

Metric Canary PR Change Trend
Fresh Build 5.583s 5.406s ✓ ▁▁▂█▁
Cached Build 5.751s 5.554s ✓ ▃▁▁█▁
📦 Production Builds (Webpack) (Legacy)

📦 Production Builds (Webpack)

Metric Canary PR Change Trend
Fresh Build 24.900s 25.543s 🔴 +643ms (+3%) ▂▁▁▁▁
Cached Build 25.305s 25.632s ✓ ▂▁▁▁▁
node_modules Size 516 MB 517 MB 🔴 +384 kB (+0%) ████▁
📦 Bundle Sizes

Bundle Sizes

⚡ Turbopack

Client

Main Bundles
Canary PR Change
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Server

Middleware
Canary PR Change
middleware-b..fest.js gzip 781 B 770 B 🟢 11 B (-1%)
Total 781 B 770 B ✅ -11 B
Build Details
Build Manifests
Canary PR Change
_buildManifest.js gzip 434 B 433 B ✓
Total 434 B 433 B ✅ -1 B

📦 Webpack

Client

Main Bundles
Canary PR Change
2486.HASH.js gzip 169 B N/A -
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8443-HASH.js gzip 4.68 kB N/A -
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Total 239 kB 239 kB ✅ -152 B
Polyfills
Canary PR Change
polyfills-HASH.js gzip 39.4 kB 39.4 kB ✓
Total 39.4 kB 39.4 kB ✓
Pages
Canary PR Change
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Total 7.96 kB 7.95 kB ✅ -7 B

Server

Edge SSR
Canary PR Change
edge-ssr.js gzip 128 kB 128 kB ✓
page.js gzip 283 kB 286 kB 🔴 +2.26 kB (+1%)
Total 411 kB 413 kB ⚠️ +2.08 kB
Middleware
Canary PR Change
middleware-b..fest.js gzip 616 B 616 B ✓
middleware-r..fest.js gzip 156 B 155 B ✓
middleware.js gzip 45.3 kB 45.4 kB ✓
edge-runtime..pack.js gzip 842 B 842 B ✓
Total 46.9 kB 47 kB ⚠️ +164 B
Build Details
Build Manifests
Canary PR Change
_buildManifest.js gzip 719 B 720 B ✓
Total 719 B 720 B ⚠️ +1 B
Build Cache
Canary PR Change
0.pack gzip 4.82 MB 4.81 MB ✓
index.pack gzip 119 kB 120 kB ✓
index.pack.old gzip 119 kB 118 kB ✓
Total 5.06 MB 5.05 MB ✅ -2.67 kB

🔄 Shared (bundler-independent)

Runtimes
Canary PR Change
app-page-exp...dev.js gzip 365 kB 365 kB ✓
app-page-exp..prod.js gzip 201 kB 202 kB ✓
app-page-tur...dev.js gzip 364 kB 365 kB ✓
app-page-tur..prod.js gzip 201 kB 201 kB ✓
app-page-tur...dev.js gzip 361 kB 361 kB ✓
app-page-tur..prod.js gzip 199 kB 199 kB ✓
app-page.run...dev.js gzip 361 kB 362 kB ✓
app-page.run..prod.js gzip 199 kB 200 kB ✓
app-route-ex...dev.js gzip 81.5 kB 81.7 kB ✓
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app-route-tu..prod.js gzip 55.1 kB 55.3 kB ✓
app-route.ru...dev.js gzip 81.1 kB 81.3 kB ✓
app-route.ru..prod.js gzip 55.1 kB 55.3 kB ✓
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dist_client_...dev.js gzip 318 B 318 B ✓
dist_client_...dev.js gzip 317 B 317 B ✓
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pages-api.ru...dev.js gzip 45.2 kB 45.4 kB ✓
pages-api.ru..prod.js gzip 33.9 kB 34.1 kB ✓
pages-turbo....dev.js gzip 54.6 kB 54.9 kB ✓
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pages.runtim...dev.js gzip 54.6 kB 54.8 kB ✓
pages.runtim..prod.js gzip 39.5 kB 39.7 kB ✓
server.runti..prod.js gzip 67.3 kB 67.8 kB ✓
use-cache-pr...dev.js gzip 71.2 kB 71.6 kB ✓
use-cache-pr...dev.js gzip 71.3 kB 71.6 kB ✓
use-cache-pr...dev.js gzip 69.6 kB 69.9 kB ✓
use-cache-pr...dev.js gzip 69.6 kB 69.9 kB ✓
Total 3.49 MB 3.5 MB ⚠️ +8.88 kB
📝 Changed Files (29 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 9 more
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📎 Tarball URL
https://vercel-packages.vercel.app/next/commits/65f6554b4f9c580a5be4e41dcb92e36d075ef379/next

Commit: 65f6554

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Failing CI jobs

Commit: 65f6554 | About building and testing Next.js

@eps1lon
eps1lon marked this pull request as ready for review July 21, 2026 16:39
@eps1lon
eps1lon merged commit 025bf4a into canary Jul 21, 2026
60 of 120 checks passed
@eps1lon
eps1lon deleted the sebbie/3-53a27f428b-branch branch July 21, 2026 16:47
m-kawafuji pushed a commit to m-kawafuji/next.js that referenced this pull request Aug 8, 2026
@github-actions github-actions Bot locked as resolved and limited conversation to collaborators Sep 12, 2026
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