let loaders automatically infer source map setting

[sokra]

These loaders automatically use the global source map setting when this option is omitted

[ijjk]

Stats from current PR

Default Build (Increase detected ⚠️)

General Overall decrease ✓

	vercel/next.js canary	vercel/next.js perf/infer-source-map	Change
buildDuration	12.8s	12.8s	-39ms
buildDurationCached	3.2s	3s	-169ms
nodeModulesSize	61.5 MB	61.5 MB	-294 B

Page Load Tests Overall increase ✓

	vercel/next.js canary	vercel/next.js perf/infer-source-map	Change
/ failed reqs	0	0	✓
/ total time (seconds)	2.243	2.264	⚠️ +0.02
/ avg req/sec	1114.48	1104.42	⚠️ -10.06
/error-in-render failed reqs	0	0	✓
/error-in-render total time (seconds)	1.332	1.209	-0.12
/error-in-render avg req/sec	1876.67	2067.27	+190.6

Client Bundles (main, webpack, commons)

	vercel/next.js canary	vercel/next.js perf/infer-source-map	Change
745.HASH.js gzip	179 B	179 B	✓
framework-HASH.js gzip	42.2 kB	42.2 kB	✓
main-HASH.js gzip	23.2 kB	23.2 kB	✓
webpack-HASH.js gzip	1.44 kB	1.44 kB	✓
Overall change	67.1 kB	67.1 kB	✓

Legacy Client Bundles (polyfills)

	vercel/next.js canary	vercel/next.js perf/infer-source-map	Change
polyfills-a4..dd70.js gzip	31 kB	31 kB	✓
Overall change	31 kB	31 kB	✓

Client Pages

	vercel/next.js canary	vercel/next.js perf/infer-source-map	Change
_app-HASH.js gzip	979 B	979 B	✓
_error-HASH.js gzip	194 B	194 B	✓
amp-HASH.js gzip	312 B	312 B	✓
css-HASH.js gzip	329 B	329 B	✓
dynamic-HASH.js gzip	2.65 kB	2.65 kB	✓
head-HASH.js gzip	351 B	351 B	✓
hooks-HASH.js gzip	918 B	918 B	✓
image-HASH.js gzip	4.13 kB	4.13 kB	✓
index-HASH.js gzip	261 B	261 B	✓
link-HASH.js gzip	1.66 kB	1.66 kB	✓
routerDirect..HASH.js gzip	318 B	318 B	✓
script-HASH.js gzip	387 B	387 B	✓
withRouter-HASH.js gzip	320 B	320 B	✓
bb14e60e810b..30f.css gzip	125 B	125 B	✓
Overall change	12.9 kB	12.9 kB	✓

Client Build Manifests

	vercel/next.js canary	vercel/next.js perf/infer-source-map	Change
_buildManifest.js gzip	492 B	492 B	✓
Overall change	492 B	492 B	✓

Rendered Page Sizes

	vercel/next.js canary	vercel/next.js perf/infer-source-map	Change
index.html gzip	539 B	539 B	✓
link.html gzip	551 B	551 B	✓
withRouter.html gzip	532 B	532 B	✓
Overall change	1.62 kB	1.62 kB	✓

---

Webpack 4 Mode (Increase detected ⚠️)

General Overall decrease ✓

	vercel/next.js canary	vercel/next.js perf/infer-source-map	Change
buildDuration	10.9s	10.8s	-129ms
buildDurationCached	4.5s	4.4s	-103ms
nodeModulesSize	61.5 MB	61.5 MB	-294 B

Page Load Tests Overall increase ✓

	vercel/next.js canary	vercel/next.js perf/infer-source-map	Change
/ failed reqs	0	0	✓
/ total time (seconds)	2.291	2.215	-0.08
/ avg req/sec	1091.09	1128.76	+37.67
/error-in-render failed reqs	0	0	✓
/error-in-render total time (seconds)	1.343	1.321	-0.02
/error-in-render avg req/sec	1862.05	1892.47	+30.42

Client Bundles (main, webpack, commons)

	vercel/next.js canary	vercel/next.js perf/infer-source-map	Change
16.HASH.js gzip	186 B	186 B	✓
677f882d2ed8..HASH.js gzip	14.1 kB	14.1 kB	✓
framework.HASH.js gzip	41.9 kB	41.9 kB	✓
main-HASH.js gzip	10.6 kB	10.6 kB	✓
webpack-HASH.js gzip	1.19 kB	1.19 kB	✓
Overall change	68 kB	68 kB	✓

Legacy Client Bundles (polyfills)

	vercel/next.js canary	vercel/next.js perf/infer-source-map	Change
polyfills-a4..dd70.js gzip	31 kB	31 kB	✓
Overall change	31 kB	31 kB	✓

Client Pages

	vercel/next.js canary	vercel/next.js perf/infer-source-map	Change
_app-HASH.js gzip	964 B	964 B	✓
_error-HASH.js gzip	3.8 kB	3.8 kB	✓
amp-HASH.js gzip	552 B	552 B	✓
css-HASH.js gzip	333 B	333 B	✓
dynamic-HASH.js gzip	2.85 kB	2.85 kB	✓
head-HASH.js gzip	3.06 kB	3.06 kB	✓
hooks-HASH.js gzip	924 B	924 B	✓
index-HASH.js gzip	231 B	231 B	✓
link-HASH.js gzip	1.64 kB	1.64 kB	✓
routerDirect..HASH.js gzip	298 B	298 B	✓
script-HASH.js gzip	2.98 kB	2.98 kB	✓
withRouter-HASH.js gzip	295 B	295 B	✓
e025d2764813..52f.css gzip	125 B	125 B	✓
Overall change	18.1 kB	18.1 kB	✓

Client Build Manifests Overall increase ⚠️

	vercel/next.js canary	vercel/next.js perf/infer-source-map	Change
_buildManifest.js gzip	499 B	500 B	⚠️ +1 B
Overall change	499 B	500 B	⚠️ +1 B

Rendered Page Sizes

	vercel/next.js canary	vercel/next.js perf/infer-source-map	Change
index.html gzip	585 B	585 B	✓
link.html gzip	597 B	597 B	✓
withRouter.html gzip	578 B	578 B	✓
Overall change	1.76 kB	1.76 kB	✓

Diffs

Diff for _buildManifest.js

@@ -6,8 +6,8 @@ self.__BUILD_MANIFEST = {
   ],
   "/amp": ["static\u002Fchunks\u002Fpages\u002Famp-4855291bfb1c5a551232.js"],
   "/css": [
-    "static\u002Fcss\u002Fe025d27648136bbd252f.css",
-    "static\u002Fchunks\u002Fpages\u002Fcss-d324ec3ec9abb3848ae8.js"
+    "static\u002Fcss\u002F30809af5c834595ef565.css",
+    "static\u002Fchunks\u002Fpages\u002Fcss-c95c4860f8f0d43ed2d2.js"
   ],
   "/dynamic": [
     "static\u002Fchunks\u002Fpages\u002Fdynamic-3b3842923577b772252c.js"

Commit: 7015192