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[fragment-scroll] Remove config.experimental.appNewScrollHandler - #95602

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eps1lon merged 1 commit into
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sebbie/force-new-scroll-handler
Aug 6, 2026
Merged

[fragment-scroll] Remove config.experimental.appNewScrollHandler#95602
eps1lon merged 1 commit into
canaryfrom
sebbie/force-new-scroll-handler

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@eps1lon

@eps1lon eps1lon commented Jul 8, 2026

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The flag has been enabled by default for 16.3.

It could've been removed before 16.3 but I just missed the window.

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Stats from current PR

🟢 3 improvements

Metric Canary PR Change Trend
node_modules Size 552 MB 552 MB 🟢 754 kB (0%) ▁▁▁▁▁
Webpack Build Time 26.409s 25.808s 🟢 601ms (-2%) ▅▂▄▆▄
Webpack Build Time (cached) 26.468s 25.443s 🟢 1.025s (-4%) ▄▃▃▇▅
📊 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) 812ms 812ms ▁▁▁▁▁
Cold (Ready in log) 776ms 782ms ▁▁▁▁▁
Cold (First Request) 1.269s 1.282s ▁▂▁▁▁
Warm (Listen) 813ms 812ms ▁▂▂▂▂
Warm (Ready in log) 779ms 781ms ▁▁▁▁▁
Warm (First Request) 1.273s 1.266s ▁▁▁▁▁
📦 Dev Server (Webpack) (Legacy)

📦 Dev Server (Webpack)

Metric Canary PR Change Trend
Cold (Listen) 813ms 813ms █▁███
Cold (Ready in log) 800ms 804ms ▆▂▆█▇
Cold (First Request) 3.462s 3.468s ▃▃▄█▆
Warm (Listen) 814ms 812ms ▅▄▅▅▅
Warm (Ready in log) 812ms 804ms ▄▂▄▆▄
Warm (First Request) 3.613s 3.511s ▅▃▄▇▄

⚡ Production Builds

Metric Canary PR Change Trend
Fresh Build 5.638s 5.726s ▁▂▁▁▂
Cached Build 2.894s 2.918s ▁▂▁▁▂
📦 Production Builds (Webpack) (Legacy)

📦 Production Builds (Webpack)

Metric Canary PR Change Trend
Fresh Build 26.409s 25.808s 🟢 601ms (-2%) ▅▂▄▆▄
Cached Build 26.468s 25.443s 🟢 1.025s (-4%) ▄▃▃▇▅
node_modules Size 552 MB 552 MB 🟢 754 kB (0%) ▁▁▁▁▁
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⚡ Turbopack

Client

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Canary PR Change
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Total 776 B 773 B ✅ -3 B
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Canary PR Change
_buildManifest.js gzip 433 B 434 B
Total 433 B 434 B ⚠️ +1 B
Build Cache
Canary PR Change
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Total 80.3 MB 80.6 MB ⚠️ +298 kB

📦 Webpack

Client

Main Bundles
Canary PR Change
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7920-HASH.js gzip 4.68 kB N/A -
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Polyfills
Canary PR Change
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Canary PR Change
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Server

Edge SSR
Canary PR Change
edge-ssr.js gzip 129 kB 128 kB
page.js gzip 294 kB 294 kB
Total 422 kB 422 kB ✅ -662 B
Middleware
Canary PR Change
middleware-b..fest.js gzip 615 B 616 B
middleware-r..fest.js gzip 156 B 156 B
middleware.js gzip 45.7 kB 45.3 kB
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Build Details
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Canary PR Change
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Total 718 B 718 B
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Canary PR Change
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Total 5.11 MB 5.07 MB ✅ -48 kB

🔄 Shared (bundler-independent)

Runtimes
Canary PR Change
app-page-exp...dev.js gzip 374 kB 373 kB
app-page-exp..prod.js gzip 207 kB 206 kB
app-page-tur...dev.js gzip 374 kB 373 kB
app-page-tur..prod.js gzip 206 kB 206 kB
app-page-tur...dev.js gzip 370 kB 369 kB
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app-page.run..prod.js gzip 204 kB 204 kB
app-route-ex...dev.js gzip 83.3 kB 83 kB
app-route-ex..prod.js gzip 56.4 kB 56.1 kB
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app-route-tu...dev.js gzip 82.9 kB 82.6 kB
app-route-tu..prod.js gzip 56.2 kB 55.9 kB
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app-route.ru..prod.js gzip 56.2 kB 55.9 kB
dev-validati...dev.js gzip 133 kB 133 kB
dev-validati...dev.js gzip 133 kB 133 kB
dev-validati...dev.js gzip 131 kB 131 kB
dev-validati...dev.js gzip 131 kB 131 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 46 kB 46 kB
pages-api-tu..prod.js gzip 34.3 kB 34.3 kB
pages-api.ru...dev.js gzip 46 kB 45.9 kB
pages-api.ru..prod.js gzip 34.3 kB 34.3 kB
pages-turbo....dev.js gzip 54.8 kB 54.7 kB
pages-turbo...prod.js gzip 39.9 kB 39.8 kB
pages.runtim...dev.js gzip 54.8 kB 54.7 kB
pages.runtim..prod.js gzip 39.9 kB 39.8 kB
server.runti..prod.js gzip 67 kB 66.9 kB
use-cache-pr...dev.js gzip 72.3 kB 72.3 kB
use-cache-pr...dev.js gzip 72.4 kB 72.3 kB
use-cache-pr...dev.js gzip 70.6 kB 70.6 kB
use-cache-pr...dev.js gzip 70.6 kB 70.6 kB
Total 4.1 MB 4.09 MB ✅ -8.83 kB
📝 Changed Files (29 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
  • app-route-ex..ntime.dev.js
  • app-route-ex..time.prod.js
  • app-route-tu..ntime.dev.js
  • app-route-tu..time.prod.js
  • app-route-tu..ntime.dev.js
  • app-route-tu..time.prod.js
  • app-route.runtime.dev.js
  • app-route.ru..time.prod.js
  • pages-api-tu..ntime.dev.js
  • pages-api-tu..time.prod.js
  • pages-api.runtime.dev.js
  • pages-api.ru..time.prod.js
  • ... and 9 more
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📎 Tarball URL
https://vercel-packages.vercel.app/next/commits/391b35882847a3aff2958f80e441bc9e4ee794e6/next

Commit: 391b358

@github-actions

github-actions Bot commented Jul 8, 2026

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Tests Passed

Commit: 391b358

@eps1lon
eps1lon force-pushed the sebbie/force-new-scroll-handler branch from bfab881 to c88ddf2 Compare July 8, 2026 12:16
Comment thread test/lib/next-test-utils.ts Outdated
@eps1lon
eps1lon force-pushed the sebbie/force-new-scroll-handler branch 2 times, most recently from d56e9d9 to 659769e Compare July 8, 2026 13:14
@eps1lon
eps1lon changed the base branch from sebbie/navigation-cc to canary July 8, 2026 14:02
@eps1lon
eps1lon force-pushed the sebbie/force-new-scroll-handler branch from 659769e to 0b4322d Compare July 8, 2026 14:02
@eps1lon
eps1lon force-pushed the sebbie/force-new-scroll-handler branch 2 times, most recently from 7d58b0b to 978a669 Compare August 5, 2026 06:05
@eps1lon
eps1lon marked this pull request as ready for review August 5, 2026 11:58
@eps1lon
eps1lon requested review from icyJoseph and ztanner August 5, 2026 11:58
Comment thread scripts/run-jest.sh Outdated

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Clanker calling out that this is never read, only assigned to in line 44

@eps1lon
eps1lon requested a review from icyJoseph August 6, 2026 05:56
@eps1lon
eps1lon force-pushed the sebbie/force-new-scroll-handler branch from 978a669 to 391b358 Compare August 6, 2026 05:56
@eps1lon
eps1lon enabled auto-merge (squash) August 6, 2026 09:48
@eps1lon
eps1lon merged commit 2c04735 into canary Aug 6, 2026
230 of 233 checks passed
@eps1lon
eps1lon deleted the sebbie/force-new-scroll-handler branch August 6, 2026 09:53
m-kawafuji pushed a commit to m-kawafuji/next.js that referenced this pull request Aug 8, 2026
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2 participants