Upgrade React from `8b2e903a-20260320` to `3cb2c420-20260324` by nextjs-bot · Pull Request #91905 · vercel/next.js

nextjs-bot · 2026-03-25T16:44:50Z

diff facebook/react@8b2e903a...3cb2c420

React upstream changes

nextjs-bot · 2026-03-25T17:01:04Z

Tests Passed

nextjs-bot · 2026-03-25T17:04:20Z

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	436ms	✓	█▁▁▁▁
Cold (First Request)	1.095s	1.077s	✓	█▂▂▂▂
Warm (Listen)	456ms	457ms	✓	█▁▁▁▁
Warm (Ready in log)	440ms	440ms	✓	█▁▁▁▁
Warm (First Request)	335ms	334ms	✓	█▁▁▁▁

📦 Dev Server (Webpack) (Legacy)

📦 Dev Server (Webpack)

Metric	Canary	PR	Change	Trend
Cold (Listen)	455ms	455ms	✓	▁▁█▁▁
Cold (Ready in log)	439ms	438ms	✓	▁▁▅▁▁
Cold (First Request)	1.975s	1.953s	✓	▃▂▆▃▁
Warm (Listen)	456ms	456ms	✓	▁▁█▁▁
Warm (Ready in log)	439ms	438ms	✓	▁▂▅▁▁
Warm (First Request)	1.991s	1.957s	✓	▂▁▅▂▁

⚡ Production Builds

Metric	Canary	PR	Change	Trend
Fresh Build	3.699s	3.652s	✓	█▁▁▁▁
Cached Build	3.647s	3.654s	✓	█▁▁▁▁

📦 Production Builds (Webpack) (Legacy)

📦 Production Builds (Webpack)

Metric	Canary	PR	Change	Trend
Fresh Build	14.443s	14.397s	✓	▁▃▅▁▂
Cached Build	14.519s	14.566s	✓	▁▃▅▁▃
node_modules Size	484 MB	484 MB	✓	▁▁▁▁▁

📦 Bundle Sizes

Bundle Sizes

⚡ Turbopack

Client

Main Bundles

	Canary	PR	Change
0.e6mae3n0hg3.js gzip	70.8 kB	N/A	-
0~lwfcrlb4v_9.css gzip	115 B	115 B	✓
00h0nz7r436~l.js gzip	13.3 kB	N/A	-
00ivb_iunbucu.js gzip	13 kB	N/A	-
00p3g3frtwyyu.js gzip	158 B	N/A	-
01at~wdgj81ve.js gzip	48.9 kB	N/A	-
0288eiw02-dao.js gzip	154 B	N/A	-
02ku7edzc_wf7.js gzip	450 B	N/A	-
03~yq9q893hmn.js gzip	39.4 kB	39.4 kB	✓
03l7sqi5m8o6h.js gzip	169 B	N/A	-
06yz7nxu4199o.js gzip	156 B	N/A	-
078k1_j4subef.js gzip	157 B	N/A	-
092lcb3fqrrf9.js gzip	8.52 kB	N/A	-
0aj~xs1l1g8tg.js gzip	8.53 kB	N/A	-
0h35gmp9u328z.js gzip	8.54 kB	N/A	-
0h6fkavebp.iz.js gzip	8.47 kB	N/A	-
0ino_yf1k3h6k.js gzip	10.4 kB	N/A	-
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0mc16gv2x1bet.js gzip	13.7 kB	N/A	-
0mncpry_rfn-y.js gzip	7.61 kB	N/A	-
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0smgy2grrrlka.js gzip	8.58 kB	N/A	-
0t1dzhdfh0txh.js gzip	215 B	215 B	✓
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1541k6nfmebhx.js gzip	154 B	N/A	-
1554wr-t7p6z-.js gzip	8.55 kB	N/A	-
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17lzb_y.udy9t.js gzip	162 B	N/A	-
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turbopack-01...q4s.js gzip	4.16 kB	N/A	-
turbopack-04..nph..js gzip	4.16 kB	N/A	-
turbopack-05..elwr.js gzip	4.16 kB	N/A	-
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turbopack-0b..5rb..js gzip	4.16 kB	N/A	-
turbopack-0s.._-q2.js gzip	4.16 kB	N/A	-
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turbopack-0x..jz4f.js gzip	4.17 kB	N/A	-
turbopack-0y..61ht.js gzip	4.16 kB	N/A	-
turbopack-0z..-kgh.js gzip	4.16 kB	N/A	-
turbopack-11..gvyu.js gzip	4.16 kB	N/A	-
turbopack-12..ts6q.js gzip	4.16 kB	N/A	-
turbopack-15..vj47.js gzip	4.16 kB	N/A	-
turbopack-16..tohb.js gzip	4.16 kB	N/A	-
02b3x5y2z3_w4.js gzip	N/A	155 B	-
03.kqy~zd5qm_.js gzip	N/A	156 B	-
03t__~.5lvgeu.js gzip	N/A	5.62 kB	-
04d6ll75jqx3r.js gzip	N/A	9.19 kB	-
0583exyh-yhc7.js gzip	N/A	9.76 kB	-
06jo1goao9xrx.js gzip	N/A	154 B	-
072lv63r8dcz~.js gzip	N/A	8.58 kB	-
075t9dxgbf0m8.js gzip	N/A	13.7 kB	-
08kzz-7th.r1l.js gzip	N/A	154 B	-
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0cq-cmde_ws6u.js gzip	N/A	8.47 kB	-
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0gtmn.q_j1v5r.js gzip	N/A	10.4 kB	-
0h5~v-tahitcf.js gzip	N/A	10.1 kB	-
0i85sm0i~_x1y.js gzip	N/A	48.8 kB	-
0ig-k1jfs1cls.js gzip	N/A	150 B	-
0io9b6fsj3fro.js gzip	N/A	65.7 kB	-
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0n~v5-fpyxhle.js gzip	N/A	169 B	-
0nclq9z6yzzm5.js gzip	N/A	1.46 kB	-
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0p5sjual.nuis.js gzip	N/A	13 kB	-
0r58t6.gpm-tf.js gzip	N/A	152 B	-
0r5kuou.9oyls.js gzip	N/A	70.8 kB	-
0s.c-cn5eebrx.js gzip	N/A	8.47 kB	-
0tjy1kuzq~pqj.js gzip	N/A	154 B	-
0tna7lg6q4zne.js gzip	N/A	12.9 kB	-
0votdfxr5fb5u.js gzip	N/A	2.28 kB	-
0ykl9bs_qj.5..js gzip	N/A	8.52 kB	-
0zfen0tnxp4gh.js gzip	N/A	8.55 kB	-
0zjn8i1or42db.js gzip	N/A	156 B	-
10wkq1h9jzkg..js gzip	N/A	225 B	-
13g1boaf.057r.js gzip	N/A	153 B	-
149ndfh8zfcaz.js gzip	N/A	8.53 kB	-
14tk8.p4labii.js gzip	N/A	161 B	-
turbopack-0_..x42p.js gzip	N/A	4.16 kB	-
turbopack-03..k3lk.js gzip	N/A	4.16 kB	-
turbopack-04..7bml.js gzip	N/A	4.13 kB	-
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turbopack-0f..kvjf.js gzip	N/A	4.16 kB	-
turbopack-0j..vtu5.js gzip	N/A	4.16 kB	-
turbopack-0m..uc58.js gzip	N/A	4.16 kB	-
turbopack-0n..7l5j.js gzip	N/A	4.17 kB	-
turbopack-0s..m-9-.js gzip	N/A	4.15 kB	-
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turbopack-15..ie.js gzip	N/A	4.15 kB	-
turbopack-15..2ttn.js gzip	N/A	4.16 kB	-
Total	463 kB	463 kB	✅ -53 B

Server

Middleware

	Canary	PR	Change
middleware-b..fest.js gzip	715 B	710 B	✓
Total	715 B	710 B	✅ -5 B

Build Details

Build Manifests

	Canary	PR	Change
_buildManifest.js gzip	436 B	431 B	🟢 5 B (-1%)
Total	436 B	431 B	✅ -5 B

📦 Webpack

Client

Main Bundles

	Canary	PR	Change
5528-HASH.js gzip	5.54 kB	N/A	-
6280-HASH.js gzip	60.6 kB	N/A	-
6335.HASH.js gzip	169 B	N/A	-
912-HASH.js gzip	4.59 kB	N/A	-
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framework-HASH.js gzip	59.7 kB	59.7 kB	✓
main-app-HASH.js gzip	253 B	254 B	✓
main-HASH.js gzip	39.3 kB	39.2 kB	✓
webpack-HASH.js gzip	1.68 kB	1.68 kB	✓
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	-
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9544-HASH.js gzip	N/A	61.3 kB	-
Total	235 kB	235 kB	⚠️ +702 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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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	✓
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link-HASH.js gzip	2.51 kB	2.51 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	7.98 kB	7.98 kB	✅ -1 B

Server

Edge SSR

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edge-ssr.js gzip	125 kB	125 kB	✓
page.js gzip	270 kB	270 kB	✓
Total	395 kB	395 kB	⚠️ +245 B

Middleware

	Canary	PR	Change
middleware-b..fest.js gzip	618 B	616 B	✓
middleware-r..fest.js gzip	156 B	155 B	✓
middleware.js gzip	43.9 kB	43.8 kB	✓
edge-runtime..pack.js gzip	842 B	842 B	✓
Total	45.5 kB	45.4 kB	✅ -109 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	4.33 MB	🟢 6.6 kB (0%)
index.pack gzip	110 kB	109 kB	✓
index.pack.old gzip	110 kB	109 kB	✓
Total	4.56 MB	4.55 MB	✅ -7.13 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	181 kB	181 kB	✓
app-page-tur...dev.js gzip	330 kB	330 kB	✓
app-page-tur..prod.js gzip	179 kB	179 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	51.8 kB	51.8 kB	✓
app-route-tu...dev.js gzip	76.2 kB	76.2 kB	✓
app-route-tu..prod.js gzip	51.9 kB	51.9 kB	✓
app-route-tu...dev.js gzip	75.8 kB	75.8 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	43.4 kB	43.4 kB	✓
pages-api-tu..prod.js gzip	33 kB	33 kB	✓
pages-api.ru...dev.js gzip	43.4 kB	43.4 kB	✓
pages-api.ru..prod.js gzip	33 kB	33 kB	✓
pages-turbo....dev.js gzip	52.8 kB	52.8 kB	✓
pages-turbo...prod.js gzip	38.6 kB	38.6 kB	✓
pages.runtim...dev.js gzip	52.8 kB	52.8 kB	✓
pages.runtim..prod.js gzip	38.6 kB	38.6 kB	✓
server.runti..prod.js gzip	62.5 kB	62.5 kB	✓
Total	2.96 MB	2.96 MB	⚠️ +9 B

📝 Changed Files (4 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

View diffs

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

failed to diff

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

failed to diff

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

failed to diff

app-page.runtime.dev.js

failed to diff

📎 Tarball URL

https://vercel-packages.vercel.app/next/commits/1135329788f0da29c4f7da54f4cb852f6b6c9cd2/next

nextjs-bot added 6 commits March 25, 2026 16:43

Update react@experimental

2a985b5

Update react

6077593

Updated peer dependency references in apps

29fbc7f

Updated peer dependency references in libraries

65e4aaa

Update lockfile

03c9cef

ncc-compiled

9f3a8cd

nextjs-bot assigned eps1lon Mar 25, 2026

nextjs-bot requested a review from eps1lon March 25, 2026 16:44

nextjs-bot added type: react-sync CI approved type: next labels Mar 25, 2026

eps1lon enabled auto-merge (squash) March 26, 2026 22:18

eps1lon approved these changes Mar 26, 2026

View reviewed changes

eps1lon merged commit b5ff8fc into canary Mar 27, 2026
401 of 410 checks passed

eps1lon deleted the update/react/19.3.0-canary-3cb2c420-20260324 branch March 27, 2026 22:24

vinassefranche mentioned this pull request Apr 2, 2026

useTransition stuck in loading state when using router.refresh() after calling a server action #86055

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github-actions Bot added the locked label Apr 11, 2026

github-actions Bot locked as resolved and limited conversation to collaborators Apr 11, 2026

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Upgrade React from `8b2e903a-20260320` to `3cb2c420-20260324`#91905

Upgrade React from `8b2e903a-20260320` to `3cb2c420-20260324`#91905
eps1lon merged 6 commits intocanaryfrom
update/react/19.3.0-canary-3cb2c420-20260324

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nextjs-bot commented Mar 25, 2026

Stats from current PR

✅ No significant changes detected

⚡ Dev Server

📦 Dev Server (Webpack)

⚡ Production Builds

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nextjs-bot commented Mar 25, 2026 •

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