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Remove --turbopack and --webpack flags from create-next-app #89706

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Remove --turbopack and --webpack flags from create-next-app #89706

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@timneutkens timneutkens commented Feb 9, 2026 •
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What?

Remove the --turbopack and --webpack CLI flags from create-next-app.

Why?

Turbopack is now the default bundler in Next.js. The --turbopack flag is redundant since it's already the default, and the --webpack flag is no longer needed as a create-next-app option. The only alternative bundler flag retained is --rspack.

How?

  • Removed --turbopack and --webpack option definitions from the CLI in packages/create-next-app/index.ts
  • Simplified bundler selection logic: defaults to Turbopack, with --rspack as the only override
  • Removed --turbopack documentation from packages/create-next-app/README.md
  • Removed all --no-turbopack flags from test invocations across all create-next-app test files
  • Removed --webpack test cases from app, pages, and app-api template tests

@nextjs-bot nextjs-bot added create-next-app Related to our CLI tool for quickly starting a new Next.js application. created-by: Turbopack team PRs by the Turbopack team. tests labels Feb 9, 2026
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timneutkens commented Feb 9, 2026

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@timneutkens timneutkens marked this pull request as ready for review February 9, 2026 09:24
@timneutkens timneutkens requested review from mischnic and sokra February 9, 2026 09:27
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nextjs-bot commented Feb 9, 2026

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) 438ms 437ms ✓ ▂▂▁▂▁
Cold (First Request) 1.167s 1.170s ✓ ▃▄▁▃▁
Warm (Listen) 457ms 457ms ✓ ▁▁▁▁▁
Warm (Ready in log) 442ms 442ms ✓ ▁▁▁▁▁
Warm (First Request) 341ms 337ms ✓ ▁▁▁▁▁
📦 Dev Server (Webpack) (Legacy)

📦 Dev Server (Webpack)

Metric Canary PR Change Trend
Cold (Listen) 455ms 455ms ✓ ▁▁▁▁▁
Cold (Ready in log) 436ms 436ms ✓ ▆▃▄▆▆
Cold (First Request) 1.774s 1.768s ✓ ▃▂▃▅▃
Warm (Listen) 455ms 455ms ✓ ▁▁▁▁▁
Warm (Ready in log) 436ms 435ms ✓ ▇▃▂▅▄
Warm (First Request) 1.787s 1.763s ✓ ▃▂▃▄▃

⚡ Production Builds

Metric Canary PR Change Trend
Fresh Build 3.842s 3.828s ✓ ▁▁▁▁▁
Cached Build 3.817s 3.795s ✓ ▁▁▁▁▁
📦 Production Builds (Webpack) (Legacy)

📦 Production Builds (Webpack)

Metric Canary PR Change Trend
Fresh Build 13.691s 13.771s ✓ ▁▃▂▃▁
Cached Build 13.823s 13.861s ✓ ▁▃▃▃▁
node_modules Size 467 MB 467 MB ✓ ▁▁▁▁▁
📦 Bundle Sizes

Bundle Sizes

⚡ Turbopack

Client

Main Bundles: **437 kB** → **437 kB** ⚠️ +9 B

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

Server

Middleware
Canary PR Change
middleware-b..fest.js gzip 762 B 758 B ✓
Total 762 B 758 B ✅ -4 B
Build Details
Build Manifests
Canary PR Change
_buildManifest.js gzip 450 B 449 B ✓
Total 450 B 449 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 255 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 ⚠️ +616 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 249 kB 249 kB ✓
Total 375 kB 375 kB ⚠️ +466 B
Middleware
Canary PR Change
middleware-b..fest.js gzip 615 B 613 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 ⚠️ +222 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 3.85 MB 3.85 MB 🔴 +5.39 kB (+0%)
index.pack gzip 103 kB 103 kB ✓
index.pack.old gzip 103 kB 103 kB ✓
Total 4.05 MB 4.06 MB ⚠️ +4.49 kB

🔄 Shared (bundler-independent)

Runtimes
Canary PR Change
app-page-exp...dev.js gzip 315 kB 315 kB ✓
app-page-exp..prod.js gzip 167 kB 167 kB ✓
app-page-tur...dev.js gzip 315 kB 315 kB ✓
app-page-tur..prod.js gzip 167 kB 167 kB ✓
app-page-tur...dev.js gzip 312 kB 312 kB ✓
app-page-tur..prod.js gzip 165 kB 165 kB ✓
app-page.run...dev.js gzip 312 kB 312 kB ✓
app-page.run..prod.js gzip 165 kB 165 kB ✓
app-route-ex...dev.js gzip 70.5 kB 70.5 kB ✓
app-route-ex..prod.js gzip 49 kB 49 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 48.8 kB 48.8 kB ✓
app-route.ru...dev.js gzip 70.1 kB 70.1 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 52.5 kB 52.5 kB ✓
pages.runtim..prod.js gzip 39.3 kB 39.3 kB ✓
server.runti..prod.js gzip 62.7 kB 62.7 kB ✓
Total 2.8 MB 2.8 MB ✓

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