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Upgrade React from 3cb2c420-20260324 to 9627b5a1-20260327#92015

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acdlite merged 6 commits intocanaryfrom
update/react/19.3.0-canary-9627b5a1-20260327
Mar 28, 2026
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Upgrade React from 3cb2c420-20260324 to 9627b5a1-20260327#92015
acdlite merged 6 commits intocanaryfrom
update/react/19.3.0-canary-9627b5a1-20260327

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@nextjs-bot nextjs-bot commented Mar 27, 2026 •
edited by eps1lon
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@nextjs-bot nextjs-bot requested a review from eps1lon March 27, 2026 22:16
@eps1lon eps1lon enabled auto-merge (squash) March 27, 2026 22:20
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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) 965ms 1.015s ✓ ▁▁▁█▁
Cold (Ready in log) 956ms 988ms ✓ ▁▁▁█▁
Cold (First Request) 1.640s 1.629s ✓ ▁▁▂█▂
Warm (Listen) 1.014s 1.014s ✓ ▁▁▁█▁
Warm (Ready in log) 997ms 1.004s ✓ ▁▁▁█▁
Warm (First Request) 759ms 753ms ✓ ▁▁▁█▁
📦 Dev Server (Webpack) (Legacy)

📦 Dev Server (Webpack)

Metric Canary PR Change Trend
Cold (Listen) 458ms 456ms ✓ ▁▁▁█▁
Cold (Ready in log) 459ms 459ms ✓ ▁▁▃█▁
Cold (First Request) 1.987s 1.999s ✓ ▃▁▅█▁
Warm (Listen) 457ms 456ms ✓ ▁▁▁█▁
Warm (Ready in log) 458ms 457ms ✓ ▂▁▃█▁
Warm (First Request) 2.062s 2.060s ✓ ▄▁▅█▁

⚡ Production Builds

Metric Canary PR Change Trend
Fresh Build 6.978s 6.917s ✓ ▁▁▁█▁
Cached Build 6.942s 6.980s ✓ ▁▁▁█▁
📦 Production Builds (Webpack) (Legacy)

📦 Production Builds (Webpack)

Metric Canary PR Change Trend
Fresh Build 14.934s 15.009s ✓ ▂▁▃█▁
Cached Build 15.157s 15.028s ✓ ▁▁▂█▁
node_modules Size 484 MB 484 MB ✓ █████
📦 Bundle Sizes

Bundle Sizes

⚡ Turbopack

Client

Main Bundles
Canary PR Change
02fkg8wfh0iju.js gzip 9.19 kB N/A -
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06rvbj82bhyo0.js gzip 13 kB N/A -
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1jp2my4ecsy0w.js gzip 157 B N/A -
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Total 464 kB 464 kB ⚠️ +6 B

Server

Middleware
Canary PR Change
middleware-b..fest.js gzip 717 B 717 B ✓
Total 717 B 717 B ✓
Build Details
Build Manifests
Canary PR Change
_buildManifest.js gzip 431 B 435 B ✓
Total 431 B 435 B ⚠️ +4 B

📦 Webpack

Client

Main Bundles
Canary PR Change
5528-HASH.js gzip 5.54 kB N/A -
6280-HASH.js gzip 60.7 kB N/A -
6335.HASH.js gzip 169 B N/A -
912-HASH.js gzip 4.59 kB N/A -
e8aec2e4-HASH.js gzip 62.7 kB N/A -
framework-HASH.js gzip 59.7 kB 59.7 kB ✓
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262-HASH.js gzip N/A 4.59 kB -
2889.HASH.js gzip N/A 169 B -
5602-HASH.js gzip N/A 5.55 kB -
6948ada0-HASH.js gzip N/A 62.8 kB -
9544-HASH.js gzip N/A 61.4 kB -
Total 235 kB 235 kB ⚠️ +673 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
_app-HASH.js gzip 194 B 194 B ✓
_error-HASH.js gzip 183 B 180 B 🟢 3 B (-2%)
css-HASH.js gzip 331 B 330 B ✓
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script-HASH.js gzip 386 B 386 B ✓
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1afbb74e6ecf..834.css gzip 106 B 106 B ✓
Total 7.98 kB 7.98 kB ✅ -1 B

Server

Edge SSR
Canary PR Change
edge-ssr.js gzip 125 kB 125 kB ✓
page.js gzip 270 kB 270 kB ✓
Total 395 kB 396 kB ⚠️ +225 B
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 44 kB 44 kB ✓
edge-runtime..pack.js gzip 842 B 842 B ✓
Total 45.6 kB 45.6 kB ⚠️ +54 B
Build Details
Build Manifests
Canary PR Change
_buildManifest.js gzip 715 B 718 B ✓
Total 715 B 718 B ⚠️ +3 B
Build Cache
Canary PR Change
0.pack gzip 4.34 MB 4.34 MB 🟢 5.11 kB (0%)
index.pack gzip 110 kB 109 kB ✓
index.pack.old gzip 110 kB 110 kB ✓
Total 4.56 MB 4.56 MB ✅ -5.72 kB

🔄 Shared (bundler-independent)

Runtimes
Canary PR Change
app-page-exp...dev.js gzip 334 kB 334 kB ✓
app-page-exp..prod.js gzip 182 kB 182 kB ✓
app-page-tur...dev.js gzip 334 kB 334 kB ✓
app-page-tur..prod.js gzip 182 kB 182 kB ✓
app-page-tur...dev.js gzip 330 kB 330 kB ✓
app-page-tur..prod.js gzip 180 kB 180 kB ✓
app-page.run...dev.js gzip 331 kB 331 kB ✓
app-page.run..prod.js gzip 180 kB 180 kB ✓
app-route-ex...dev.js gzip 76.2 kB 76.2 kB ✓
app-route-ex..prod.js gzip 51.9 kB 51.9 kB ✓
app-route-tu...dev.js gzip 76.3 kB 76.3 kB ✓
app-route-tu..prod.js gzip 51.9 kB 51.9 kB ✓
app-route-tu...dev.js gzip 75.9 kB 75.9 kB ✓
app-route-tu..prod.js gzip 51.6 kB 51.6 kB ✓
app-route.ru...dev.js gzip 75.8 kB 75.8 kB ✓
app-route.ru..prod.js gzip 51.6 kB 51.6 kB ✓
dist_client_...dev.js gzip 324 B 324 B ✓
dist_client_...dev.js gzip 326 B 326 B ✓
dist_client_...dev.js gzip 318 B 318 B ✓
dist_client_...dev.js gzip 317 B 317 B ✓
pages-api-tu...dev.js gzip 43.5 kB 43.5 kB ✓
pages-api-tu..prod.js gzip 33.1 kB 33.1 kB ✓
pages-api.ru...dev.js gzip 43.4 kB 43.4 kB ✓
pages-api.ru..prod.js gzip 33.1 kB 33.1 kB ✓
pages-turbo....dev.js gzip 52.9 kB 52.9 kB ✓
pages-turbo...prod.js gzip 38.7 kB 38.7 kB ✓
pages.runtim...dev.js gzip 52.8 kB 52.8 kB ✓
pages.runtim..prod.js gzip 38.7 kB 38.7 kB ✓
server.runti..prod.js gzip 62.5 kB 62.5 kB ✓
Total 2.96 MB 2.96 MB ⚠️ +43 B
📝 Changed Files (8 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
View diffs
app-page-exp..ntime.dev.js 
failed to diff
app-page-exp..time.prod.js 
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app-page-tur..ntime.dev.js 
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app-page-tur..time.prod.js 
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app-page-tur..ntime.dev.js 
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app-page-tur..time.prod.js 
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app-page.runtime.dev.js 
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app-page.runtime.prod.js 
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📎 Tarball URL 
https://vercel-packages.vercel.app/next/commits/5907bc89719264702e66189f24ad31b6215bf8be/next

@eps1lon eps1lon changed the title Upgrade React from 8b2e903a-20260320 to 9627b5a1-20260327 Upgrade React from 3cb2c420-20260324 to 9627b5a1-20260327 Mar 27, 2026
@eps1lon eps1lon force-pushed the update/react/19.3.0-canary-9627b5a1-20260327 branch from 8c3de9d to 02e4181 Compare March 27, 2026 22:41
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nextjs-bot commented Mar 27, 2026 •
edited
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Failing test suites

Commit: 02e4181 | About building and testing Next.js

@acdlite acdlite disabled auto-merge March 28, 2026 00:34
@acdlite acdlite merged commit d8b5ea2 into canary Mar 28, 2026
406 of 421 checks passed
@acdlite acdlite deleted the update/react/19.3.0-canary-9627b5a1-20260327 branch March 28, 2026 00:34
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