refactor: extract build infra and alias changes by timneutkens · Pull Request #90422 · vercel/next.js

timneutkens · 2026-02-24T11:32:30Z

What?

Extracts the bundling infra to have the Node.js streams experimental flag out of #89859

This only adds the bundle and the v8-jit skill. It does not use the bundle yet, and it's not switching code base on the env var.

There will be follow-up PRs for those.

timneutkens · 2026-02-24T11:32:46Z

refactor: extract build infra and alias changes #90422 : 2 dependent PRs (#90424 , #90427 ) 👈 (View in Graphite)
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nextjs-bot · 2026-02-24T11:42:40Z

Tests Passed

nextjs-bot · 2026-02-24T11:50:49Z

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)	507ms	508ms	✓	▁▃▃▁█
Cold (Ready in log)	482ms	482ms	✓	▁▂▃▂█
Cold (First Request)	1.038s	1.014s	✓	▁▃▃▅█
Warm (Listen)	507ms	508ms	✓	▁▂▃▁█
Warm (Ready in log)	476ms	472ms	✓	▁▂▂▁█
Warm (First Request)	372ms	366ms	✓	▁▂▂▁█

📦 Dev Server (Webpack) (Legacy)

📦 Dev Server (Webpack)

Metric	Canary	PR	Change	Trend
Cold (Listen)	455ms	455ms	✓	███▁▁
Cold (Ready in log)	438ms	437ms	✓	▅▆██▇
Cold (First Request)	1.956s	1.938s	✓	█▃▄▅▄
Warm (Listen)	456ms	455ms	✓	█▁▅▅▅
Warm (Ready in log)	437ms	438ms	✓	▃▅▆▆▆
Warm (First Request)	1.979s	1.981s	✓	▇▂▃▄▃

⚡ Production Builds

Metric	Canary	PR	Change	Trend
Fresh Build	4.706s	4.763s	✓	▁▅▅▁█
Cached Build	4.703s	4.661s	✓	▁▅▅▁█

📦 Production Builds (Webpack) (Legacy)

📦 Production Builds (Webpack)

Metric	Canary	PR	Change	Trend
Fresh Build	14.094s	14.055s	✓	█▁▁▂▂
Cached Build	14.129s	14.212s	✓	█▁▂▂▁
node_modules Size	474 MB	474 MB	✓	█████

📦 Bundle Sizes

Bundle Sizes

⚡ Turbopack

Client

Main Bundles: **399 kB** → **399 kB** ✅ -23 B

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

Server

Middleware

	Canary	PR	Change
middleware-b..fest.js gzip	769 B	763 B	✓
Total	769 B	763 B	✅ -6 B

Build Details

Build Manifests

	Canary	PR	Change
_buildManifest.js gzip	451 B	450 B	✓
Total	451 B	450 B	✅ -1 B

📦 Webpack

Client

Main Bundles

	Canary	PR	Change
5528-HASH.js gzip	5.48 kB	N/A	-
6280-HASH.js gzip	57.5 kB	N/A	-
6335.HASH.js gzip	169 B	N/A	-
912-HASH.js gzip	4.53 kB	N/A	-
e8aec2e4-HASH.js gzip	62.6 kB	N/A	-
framework-HASH.js gzip	59.7 kB	59.7 kB	✓
main-app-HASH.js gzip	256 B	253 B	🟢 3 B (-1%)
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	4.53 kB	-
2889.HASH.js gzip	N/A	169 B	-
5602-HASH.js gzip	N/A	5.49 kB	-
6948ada0-HASH.js gzip	N/A	62.6 kB	-
9544-HASH.js gzip	N/A	58.3 kB	-
Total	231 kB	232 kB	⚠️ +753 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	2.5 kB	2.5 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	✅ -2 B

Server

Edge SSR

	Canary	PR	Change
edge-ssr.js gzip	125 kB	125 kB	✓
page.js gzip	252 kB	253 kB	✓
Total	377 kB	378 kB	⚠️ +529 B

Middleware

	Canary	PR	Change
middleware-b..fest.js gzip	614 B	614 B	✓
middleware-r..fest.js gzip	156 B	155 B	✓
middleware.js gzip	43.6 kB	43.9 kB	✓
edge-runtime..pack.js gzip	842 B	842 B	✓
Total	45.2 kB	45.5 kB	⚠️ +305 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	3.98 MB	3.99 MB	🔴 +9.07 kB (+0%)
index.pack gzip	102 kB	103 kB	🔴 +1.6 kB (+2%)
index.pack.old gzip	103 kB	104 kB	🔴 +1.24 kB (+1%)
Total	4.18 MB	4.19 MB	⚠️ +11.9 kB

🔄 Shared (bundler-independent)

Runtimes

	Canary	PR	Change
app-page-exp...dev.js gzip	318 kB	318 kB	✓
app-page-exp..prod.js gzip	168 kB	169 kB	✓
app-page-tur...dev.js gzip	318 kB	318 kB	✓
app-page-tur..prod.js gzip	168 kB	168 kB	✓
app-page-tur...dev.js gzip	314 kB	314 kB	✓
app-page-tur..prod.js gzip	166 kB	166 kB	✓
app-page.run...dev.js gzip	315 kB	315 kB	✓
app-page.run..prod.js gzip	167 kB	167 kB	✓
app-route-ex...dev.js gzip	70.7 kB	70.7 kB	✓
app-route-ex..prod.js gzip	49.1 kB	49.1 kB	✓
app-route-tu...dev.js gzip	70.7 kB	70.7 kB	✓
app-route-tu..prod.js gzip	49.2 kB	49.2 kB	✓
app-route-tu...dev.js gzip	70.3 kB	70.3 kB	✓
app-route-tu..prod.js gzip	48.9 kB	48.9 kB	✓
app-route.ru...dev.js gzip	70.2 kB	70.2 kB	✓
app-route.ru..prod.js gzip	48.9 kB	48.9 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	43.2 kB	43.2 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	38.5 kB	38.5 kB	✓
pages.runtim...dev.js gzip	52.5 kB	52.5 kB	✓
pages.runtim..prod.js gzip	38.4 kB	38.4 kB	✓
server.runti..prod.js gzip	62 kB	62 kB	✓
Total	2.81 MB	2.81 MB	⚠️ +213 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

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app-page-exp..time.prod.js

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

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

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📎 Tarball URL

next@https://vercel-packages.vercel.app/next/prs/90422/next

nextjs-bot added created-by: Turbopack team PRs by the Turbopack team. type: next labels Feb 24, 2026

timneutkens marked this pull request as ready for review February 24, 2026 11:35

nextjs-bot added the tests label Feb 24, 2026

This was referenced Feb 24, 2026

refactor: update module.compiled.js for node stream support #90424

Closed

feat(node-streams): add config flag, define-env, and env precedence test #90427

Open

WIP: React optimization #89823

Closed

ci: add node-stream test coverage workflow #89861

Draft

timneutkens added 2 commits February 24, 2026 14:16

refactor: extract build infra and alias changes

2b961d5

Update ssr-in-rsc.test.ts

6e3a8d6

timneutkens force-pushed the 02-24-refactor_extract_build_infra_and_alias_changes branch from 255c202 to 6e3a8d6 Compare February 24, 2026 13:16

Don't create additional bundles

5502bf8

timneutkens mentioned this pull request Feb 25, 2026

Node.js streams: First pass #90500

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refactor: extract build infra and alias changes#90422

refactor: extract build infra and alias changes#90422
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