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refactor: extract build infra and alias changes#90422

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timneutkens merged 4 commits intocanaryfrom
02-24-refactor_extract_build_infra_and_alias_changes
Mar 19, 2026
Merged

refactor: extract build infra and alias changes#90422
timneutkens merged 4 commits intocanaryfrom
02-24-refactor_extract_build_infra_and_alias_changes

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@timneutkens timneutkens commented Feb 24, 2026 •
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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.

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timneutkens commented Feb 24, 2026 •
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@timneutkens timneutkens marked this pull request as ready for review February 24, 2026 11:35
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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) 455ms 455ms ✓ ▅█▁▁▁
Cold (Ready in log) 439ms 438ms ✓ ▄█▁▁▁
Cold (First Request) 1.238s 1.244s ✓ ▃█▁▁▁
Warm (Listen) 457ms 457ms ✓ ▅█▁▁▁
Warm (Ready in log) 443ms 442ms ✓ ▃█▁▁▁
Warm (First Request) 354ms 346ms ✓ ▃█▁▁▁
📦 Dev Server (Webpack) (Legacy)

📦 Dev Server (Webpack)

Metric Canary PR Change Trend
Cold (Listen) 506ms 507ms ✓ █▁▁▁▁
Cold (Ready in log) 489ms 488ms ✓ █▁▄▆▅
Cold (First Request) 2.208s 2.218s ✓ █▁▃▄▃
Warm (Listen) 507ms 507ms ✓ █▁▁▁▁
Warm (Ready in log) 486ms 485ms ✓ █▁▅▄▃
Warm (First Request) 2.221s 2.220s ✓ █▁▃▃▃

⚡ Production Builds

Metric Canary PR Change Trend
Fresh Build 3.811s 3.810s ✓ ▃█▁▁▁
Cached Build 3.720s 3.724s ✓ ▃█▁▁▁
📦 Production Builds (Webpack) (Legacy)

📦 Production Builds (Webpack)

Metric Canary PR Change Trend
Fresh Build 15.981s 16.046s ✓ █▁▁▁▁
Cached Build 16.073s 16.153s ✓ █▁▁▁▁
node_modules Size 477 MB 477 MB ✓ ██▁▁▁
📦 Bundle Sizes

Bundle Sizes

⚡ Turbopack

Client

Main Bundles: **402 kB** → **402 kB** ⚠️ +31 B

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

Server

Middleware
Canary PR Change
middleware-b..fest.js gzip 766 B 767 B ✓
Total 766 B 767 B ⚠️ +1 B
Build Details
Build Manifests
Canary PR Change
_buildManifest.js gzip 446 B 450 B ✓
Total 446 B 450 B ⚠️ +4 B

📦 Webpack

Client

Main Bundles
Canary PR Change
5528-HASH.js gzip 5.54 kB N/A -
6280-HASH.js gzip 59.4 kB N/A -
6335.HASH.js gzip 169 B N/A -
912-HASH.js gzip 4.59 kB N/A -
e8aec2e4-HASH.js gzip 62.6 kB N/A -
framework-HASH.js gzip 59.7 kB 59.7 kB ✓
main-app-HASH.js gzip 256 B 255 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 4.59 kB -
2889.HASH.js gzip N/A 169 B -
5602-HASH.js gzip N/A 5.55 kB -
6948ada0-HASH.js gzip N/A 62.6 kB -
9544-HASH.js gzip N/A 60.2 kB -
Total 233 kB 234 kB ⚠️ +734 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 2.51 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
Canary PR Change
edge-ssr.js gzip 125 kB 125 kB ✓
page.js gzip 256 kB 256 kB ✓
Total 380 kB 381 kB ⚠️ +793 B
Middleware
Canary PR Change
middleware-b..fest.js gzip 617 B 616 B ✓
middleware-r..fest.js gzip 156 B 155 B ✓
middleware.js gzip 43.8 kB 43.7 kB ✓
edge-runtime..pack.js gzip 842 B 842 B ✓
Total 45.4 kB 45.3 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 4.07 MB 4.07 MB 🔴 +4.86 kB (+0%)
index.pack gzip 103 kB 103 kB ✓
index.pack.old gzip 103 kB 103 kB ✓
Total 4.27 MB 4.28 MB ⚠️ +4.67 kB

🔄 Shared (bundler-independent)

Runtimes
Canary PR Change
app-page-exp...dev.js gzip 322 kB 322 kB ✓
app-page-exp..prod.js gzip 171 kB 171 kB ✓
app-page-tur...dev.js gzip 322 kB 322 kB ✓
app-page-tur..prod.js gzip 171 kB 171 kB ✓
app-page-tur...dev.js gzip 318 kB 318 kB ✓
app-page-tur..prod.js gzip 169 kB 169 kB ✓
app-page.run...dev.js gzip 319 kB 319 kB ✓
app-page.run..prod.js gzip 169 kB 169 kB ✓
app-route-ex...dev.js gzip 70.9 kB 70.9 kB ✓
app-route-ex..prod.js gzip 49.3 kB 49.3 kB ✓
app-route-tu...dev.js gzip 70.9 kB 70.9 kB ✓
app-route-tu..prod.js gzip 49.3 kB 49.3 kB ✓
app-route-tu...dev.js gzip 70.5 kB 70.5 kB ✓
app-route-tu..prod.js gzip 49 kB 49 kB ✓
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app-route.ru..prod.js gzip 49 kB 49 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 ✓
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pages-api.ru...dev.js gzip 43.2 kB 43.2 kB ✓
pages-api.ru..prod.js gzip 32.9 kB 32.9 kB ✓
pages-turbo....dev.js gzip 52.6 kB 52.6 kB ✓
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pages.runtim..prod.js gzip 38.5 kB 38.5 kB ✓
server.runti..prod.js gzip 62 kB 62 kB ✓
Total 2.84 MB 2.84 MB ⚠️ +215 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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📎 Tarball URL 
https://vercel-packages.vercel.app/next/commits/50efa89872fbaf582ad7d67886e70cfdca54ae16/next

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@timneutkens timneutkens force-pushed the 02-24-refactor_extract_build_infra_and_alias_changes branch from 255c202 to 6e3a8d6 Compare February 24, 2026 13:16
@timneutkens timneutkens mentioned this pull request Feb 25, 2026
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@timneutkens timneutkens force-pushed the 02-24-refactor_extract_build_infra_and_alias_changes branch from 5502bf8 to 8e99bd2 Compare March 3, 2026 11:29
@timneutkens timneutkens requested review from feedthejim and gnoff March 3, 2026 11:30
@timneutkens timneutkens force-pushed the 02-24-refactor_extract_build_infra_and_alias_changes branch from 8e99bd2 to 93323a7 Compare March 3, 2026 14:56
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@timneutkens timneutkens force-pushed the 02-24-refactor_extract_build_infra_and_alias_changes branch 3 times, most recently from 77c6ffb to d520893 Compare March 5, 2026 14:25
@timneutkens timneutkens force-pushed the 02-24-refactor_extract_build_infra_and_alias_changes branch from d520893 to 50efa89 Compare March 6, 2026 09:43
gnoff
gnoff approved these changes Mar 17, 2026
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is the .agents/skills/v8-jit/SKILL.md intended to land in this PR?

@timneutkens timneutkens merged commit 58fb963 into canary Mar 19, 2026
410 of 417 checks passed
@timneutkens timneutkens deleted the 02-24-refactor_extract_build_infra_and_alias_changes branch March 19, 2026 12:36
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