Upgrade React from `3e00319b-20260203` to `bb533877-20260205` by nextjs-bot · Pull Request #89541 · vercel/next.js

nextjs-bot · 2026-02-05T16:35:04Z

diff facebook/react@3e00319b...bb533877

React upstream changes

nextjs-bot · 2026-02-05T16:53:56Z

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 (Ready in log)	435ms	435ms	✓	▅▄█▄▅
Cold (First Request)	1.141s	1.155s	✓	█▃▆▇▆
Warm (Listen)	457ms	456ms	✓	▁▅█▁▁
Warm (Ready in log)	439ms	445ms	✓	▁▄█▁▁
Warm (First Request)	335ms	342ms	✓	▃▃█▄▄

📦 Dev Server (Webpack) (Legacy)

📦 Dev Server (Webpack)

Metric	Canary	PR	Change	Trend
Cold (Listen)	456ms	456ms	✓	█▁▁▁▁
Cold (Ready in log)	436ms	436ms	✓	▆▄▅▅▅
Cold (First Request)	1.847s	1.853s	✓	▅▂▄▃▃
Warm (Listen)	455ms	456ms	✓	█▁▁▁▁
Warm (Ready in log)	436ms	435ms	✓	▆▄▄▅▅
Warm (First Request)	1.871s	1.888s	✓	▆▂▄▃▃

⚡ Production Builds

Metric	Canary	PR	Change	Trend
Fresh Build	3.996s	3.972s	✓	▁▅█▁▁
Cached Build	3.998s	4.015s	✓	▁▅█▁▁

📦 Production Builds (Webpack) (Legacy)

📦 Production Builds (Webpack)

Metric	Canary	PR	Change	Trend
Fresh Build	13.702s	13.694s	✓	▆▁▅▁▁
Cached Build	13.759s	13.776s	✓	▆▁▆▂▁
node_modules Size	465 MB	465 MB	✓	▁▁███

📦 Bundle Sizes

Bundle Sizes

⚡ Turbopack

Client

Main Bundles: **437 kB** → **437 kB** ✅ -10 B

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

Server

Middleware

	Canary	PR	Change
middleware-b..fest.js gzip	764 B	758 B	✓
Total	764 B	758 B	✅ -6 B

Build Details

Build Manifests

	Canary	PR	Change
_buildManifest.js gzip	452 B	451 B	✓
Total	452 B	451 B	✅ -1 B

📦 Webpack

Client

Main Bundles

	Canary	PR	Change
5528-HASH.js gzip	5.47 kB	N/A	-
6280-HASH.js gzip	56.9 kB	N/A	-
6335.HASH.js gzip	169 B	N/A	-
912-HASH.js gzip	4.53 kB	N/A	-
e8aec2e4-HASH.js gzip	62.5 kB	N/A	-
framework-HASH.js gzip	59.7 kB	59.7 kB	✓
main-app-HASH.js gzip	254 B	254 B	✓
main-HASH.js gzip	39.1 kB	39.1 kB	✓
webpack-HASH.js gzip	1.68 kB	1.68 kB	✓
262-HASH.js gzip	N/A	4.52 kB	-
2889.HASH.js gzip	N/A	169 B	-
5602-HASH.js gzip	N/A	5.48 kB	-
6948ada0-HASH.js gzip	N/A	62.5 kB	-
9544-HASH.js gzip	N/A	57.5 kB	-
Total	230 kB	231 kB	⚠️ +599 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	✓
dynamic-HASH.js gzip	1.81 kB	1.81 kB	✓
edge-ssr-HASH.js gzip	256 B	256 B	✓
head-HASH.js gzip	351 B	352 B	✓
hooks-HASH.js gzip	384 B	383 B	✓
image-HASH.js gzip	580 B	581 B	✓
index-HASH.js gzip	260 B	260 B	✓
link-HASH.js gzip	2.49 kB	2.49 kB	✓
routerDirect..HASH.js gzip	320 B	319 B	✓
script-HASH.js gzip	386 B	386 B	✓
withRouter-HASH.js gzip	315 B	315 B	✓
1afbb74e6ecf..834.css gzip	106 B	106 B	✓
Total	7.97 kB	7.97 kB	✅ -1 B

Server

Edge SSR

	Canary	PR	Change
edge-ssr.js gzip	126 kB	126 kB	✓
page.js gzip	248 kB	249 kB	✓
Total	374 kB	375 kB	⚠️ +896 B

Middleware

	Canary	PR	Change
middleware-b..fest.js gzip	617 B	612 B	✓
middleware-r..fest.js gzip	156 B	155 B	✓
middleware.js gzip	33 kB	33.2 kB	✓
edge-runtime..pack.js gzip	842 B	842 B	✓
Total	34.6 kB	34.8 kB	⚠️ +251 B

Build Details

Build Manifests

	Canary	PR	Change
_buildManifest.js gzip	732 B	736 B	✓
Total	732 B	736 B	⚠️ +4 B

Build Cache

	Canary	PR	Change
0.pack gzip	3.83 MB	3.83 MB	🔴 +7.74 kB (+0%)
index.pack gzip	102 kB	103 kB	✓
index.pack.old gzip	103 kB	102 kB	✓
Total	4.03 MB	4.04 MB	⚠️ +7.65 kB

🔄 Shared (bundler-independent)

Runtimes

	Canary	PR	Change
app-page-exp...dev.js gzip	313 kB	313 kB	✓
app-page-exp..prod.js gzip	167 kB	167 kB	✓
app-page-tur...dev.js gzip	313 kB	313 kB	✓
app-page-tur..prod.js gzip	167 kB	167 kB	✓
app-page-tur...dev.js gzip	309 kB	309 kB	✓
app-page-tur..prod.js gzip	165 kB	165 kB	✓
app-page.run...dev.js gzip	309 kB	309 kB	✓
app-page.run..prod.js gzip	165 kB	165 kB	✓
app-route-ex...dev.js gzip	70.4 kB	70.4 kB	✓
app-route-ex..prod.js gzip	48.9 kB	48.9 kB	✓
app-route-tu...dev.js gzip	70.5 kB	70.5 kB	✓
app-route-tu..prod.js gzip	49 kB	49 kB	✓
app-route-tu...dev.js gzip	70.1 kB	70.1 kB	✓
app-route-tu..prod.js gzip	48.7 kB	48.7 kB	✓
app-route.ru...dev.js gzip	70 kB	70 kB	✓
app-route.ru..prod.js gzip	48.7 kB	48.7 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	43.2 kB	43.2 kB	✓
pages-api-tu..prod.js gzip	32.9 kB	32.9 kB	✓
pages-api.ru...dev.js gzip	43.1 kB	43.1 kB	✓
pages-api.ru..prod.js gzip	32.8 kB	32.8 kB	✓
pages-turbo....dev.js gzip	52.5 kB	52.5 kB	✓
pages-turbo...prod.js gzip	39.4 kB	39.4 kB	✓
pages.runtim...dev.js gzip	52.4 kB	52.4 kB	✓
pages.runtim..prod.js gzip	39.3 kB	39.3 kB	✓
server.runti..prod.js gzip	62.7 kB	62.7 kB	✓
Total	2.78 MB	2.79 MB	⚠️ +604 B

📝 Changed Files (5 files)

Files with changes:

app-page-exp..ntime.dev.js
app-page-tur..ntime.dev.js
app-page-tur..ntime.dev.js
app-page.runtime.dev.js
server.runtime.prod.js

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app-page-exp..ntime.dev.js

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app-page-tur..ntime.dev.js

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app-page.runtime.dev.js

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server.runtime.prod.js

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eps1lon

Double checking if parallel transitions was supposed to be turned on

eps1lon · 2026-02-05T18:30:28Z

Accidentally includes parallel Transition experiment.

nextjs-bot added 6 commits February 5, 2026 16:33

Update react@experimental

fb9c1fb

Update react

8f2abc0

Updated peer dependency references in apps

60747f8

Updated peer dependency references in libraries

3e4ea81

Update lockfile

9b4b271

ncc-compiled

5d9e8ef

nextjs-bot assigned eps1lon Feb 5, 2026

nextjs-bot requested a review from eps1lon February 5, 2026 16:35

nextjs-bot added type: react-sync CI approved Approve running CI for fork type: next labels Feb 5, 2026

eps1lon approved these changes Feb 5, 2026

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eps1lon requested changes Feb 5, 2026

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eps1lon closed this Feb 5, 2026

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Upgrade React from `3e00319b-20260203` to `bb533877-20260205`#89541

Upgrade React from `3e00319b-20260203` to `bb533877-20260205`#89541
nextjs-bot wants to merge 6 commits intocanaryfrom
update/react/19.3.0-canary-bb533877-20260205

nextjs-bot commented Feb 5, 2026

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nextjs-bot commented Feb 5, 2026

⚡ Dev Server

📦 Dev Server (Webpack)

⚡ Production Builds

📦 Production Builds (Webpack)

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⚡ Turbopack

📦 Webpack

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nextjs-bot commented Feb 5, 2026

Stats from current PR

✅ No significant changes detected

⚡ Dev Server

📦 Dev Server (Webpack)

⚡ Production Builds

📦 Production Builds (Webpack)

Bundle Sizes

⚡ Turbopack

📦 Webpack

🔄 Shared (bundler-independent)

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