Add experimental option to use no-cache instead of no-store in dev

[timneutkens]

What?

Adds experimental.devCacheControlNoCache to test no-cache vs no-store for development.

Note: This is for testing only right now. If it's an improvement we'll change the default.

[timneutkens]

• Add experimental option to use no-cache instead of no-store in dev #88182 👈 (View in Graphite)
• canary

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[nextjs-bot]

Stats from current PR

🔴 1 regression, 1 improvement

Metric	Canary	PR	Change	Trend
node_modules Size	457 MB	457 MB	🔴 +11.2 kB (+0%)	▁████
Warm (First Request)	385ms	342ms	🟢 43ms (-11%)

📊 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
Cold (Listen)	455ms	455ms	✓
Cold (First Request)	1.168s	1.163s	✓
Warm (Listen)	456ms	457ms	✓
Warm (First Request)	385ms	342ms	🟢 43ms (-11%)

📦 Dev Server (Webpack) (Legacy)

📦 Dev Server (Webpack)

Metric	Canary	PR	Change
Cold (Listen)	455ms	455ms	✓
Cold (First Request)	1.814s	1.828s	✓
Warm (Listen)	455ms	456ms	✓
Warm (First Request)	1.828s	1.829s	✓

⚡ Production Builds

Metric	Canary	PR	Change
Fresh Build	4.149s	4.114s	✓
Cached Build	4.134s	4.165s	✓

📦 Production Builds (Webpack) (Legacy)

📦 Production Builds (Webpack)

Metric	Canary	PR	Change	Trend
Fresh Build	13.967s	13.887s	✓
Cached Build	14.024s	13.972s	✓
node_modules Size	457 MB	457 MB	🔴 +11.2 kB (+0%)	▁████

📦 Bundle Sizes

Bundle Sizes

⚡ Turbopack

Client

Main Bundles: **430 kB** → **430 kB** ⚠️ +10 B

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

Server

Middleware

	Canary	PR	Change
middleware-b..fest.js gzip	787 B	791 B	✓
Total	787 B	791 B	⚠️ +4 B

Build Details

Build Manifests

	Canary	PR	Change
_buildManifest.js gzip	447 B	452 B	🔴 +5 B (+1%)
Total	447 B	452 B	⚠️ +5 B

📦 Webpack

Client

Main Bundles

	Canary	PR	Change
2086.HASH.js gzip	169 B	N/A	-
2161-HASH.js gzip	5.4 kB	N/A	-
2747-HASH.js gzip	4.48 kB	N/A	-
4322-HASH.js gzip	52.5 kB	N/A	-
ec793fe8-HASH.js gzip	62.3 kB	N/A	-
framework-HASH.js gzip	59.8 kB	59.8 kB	✓
main-app-HASH.js gzip	251 B	254 B	🔴 +3 B (+1%)
main-HASH.js gzip	38.4 kB	38.8 kB	✓
webpack-HASH.js gzip	1.68 kB	1.69 kB	✓
1596.HASH.js gzip	N/A	169 B	-
2658-HASH.js gzip	N/A	52.2 kB	-
6349-HASH.js gzip	N/A	4.46 kB	-
7019-HASH.js gzip	N/A	5.42 kB	-
b17a3386-HASH.js gzip	N/A	62.3 kB	-
Total	225 kB	225 kB	⚠️ +125 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	193 B	✓
_error-HASH.js gzip	182 B	182 B	✓
css-HASH.js gzip	336 B	335 B	✓
dynamic-HASH.js gzip	1.8 kB	1.8 kB	✓
edge-ssr-HASH.js gzip	256 B	256 B	✓
head-HASH.js gzip	352 B	349 B	✓
hooks-HASH.js gzip	385 B	384 B	✓
image-HASH.js gzip	580 B	580 B	✓
index-HASH.js gzip	259 B	258 B	✓
link-HASH.js gzip	2.5 kB	2.51 kB	✓
routerDirect..HASH.js gzip	319 B	317 B	✓
script-HASH.js gzip	385 B	387 B	✓
withRouter-HASH.js gzip	316 B	315 B	✓
1afbb74e6ecf..834.css gzip	106 B	106 B	✓
Total	7.97 kB	7.96 kB	✅ -8 B

Server

Edge SSR

	Canary	PR	Change
edge-ssr.js gzip	124 kB	124 kB	✓
page.js gzip	240 kB	241 kB	✓
Total	364 kB	365 kB	⚠️ +745 B

Middleware

	Canary	PR	Change
middleware-b..fest.js gzip	652 B	656 B	✓
middleware-r..fest.js gzip	155 B	156 B	✓
middleware.js gzip	32.8 kB	32.9 kB	✓
edge-runtime..pack.js gzip	846 B	846 B	✓
Total	34.5 kB	34.6 kB	⚠️ +76 B

Build Details

Build Manifests

	Canary	PR	Change
_buildManifest.js gzip	738 B	738 B	✓
Total	738 B	738 B	✓

Build Cache

	Canary	PR	Change
0.pack gzip	3.62 MB	3.63 MB	🔴 +7.21 kB (+0%)
index.pack gzip	99.7 kB	98.2 kB	🟢 1.45 kB (-1%)
index.pack.old gzip	99.4 kB	99.7 kB	✓
Total	3.82 MB	3.83 MB	⚠️ +6 kB

🔄 Shared (bundler-independent)

Runtimes

	Canary	PR	Change
app-page-exp...dev.js gzip	303 kB	303 kB	✓
app-page-exp..prod.js gzip	158 kB	158 kB	✓
app-page-tur...dev.js gzip	302 kB	302 kB	✓
app-page-tur..prod.js gzip	158 kB	158 kB	✓
app-page-tur...dev.js gzip	299 kB	299 kB	✓
app-page-tur..prod.js gzip	156 kB	156 kB	✓
app-page.run...dev.js gzip	299 kB	299 kB	✓
app-page.run..prod.js gzip	156 kB	156 kB	✓
app-route-ex...dev.js gzip	68.7 kB	68.7 kB	✓
app-route-ex..prod.js gzip	47.5 kB	47.5 kB	✓
app-route-tu...dev.js gzip	68.7 kB	68.7 kB	✓
app-route-tu..prod.js gzip	47.5 kB	47.5 kB	✓
app-route-tu...dev.js gzip	68.3 kB	68.3 kB	✓
app-route-tu..prod.js gzip	47.3 kB	47.3 kB	✓
app-route.ru...dev.js gzip	68.3 kB	68.3 kB	✓
app-route.ru..prod.js gzip	47.3 kB	47.3 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	41.1 kB	41.1 kB	✓
pages-api-tu..prod.js gzip	31.2 kB	31.2 kB	✓
pages-api.ru...dev.js gzip	41 kB	41 kB	✓
pages-api.ru..prod.js gzip	31.2 kB	31.2 kB	✓
pages-turbo....dev.js gzip	50.8 kB	50.8 kB	✓
pages-turbo...prod.js gzip	38.2 kB	38.2 kB	✓
pages.runtim...dev.js gzip	50.7 kB	50.7 kB	✓
pages.runtim..prod.js gzip	38.2 kB	38.2 kB	✓
server.runti..prod.js gzip	62.2 kB	62.2 kB	✓
Total	2.68 MB	2.68 MB	⚠️ +32 B

📝 Changed Files (1 file)

Files with changes:

• server.runtime.prod.js

View diffs

server.runtime.prod.js

Diff too large to display