Update bundler for pre-bundling runtime #75294

ijjk · 2025-01-24T20:47:45Z

This improves the build script quite a bit and makes dev editing much faster. Also fixed excludes causing webpack/babel compiled packages to be bundled into the runtime un-necessarily reducing from 10MB -> 1.2MB.

Before: Finished next_bundle in 9.67s

After: Finished next_bundle in 1.27s

Validated here https://github.com/vercel/vercel/actions/runs/12957911052/job/36147343396?pr=12914

ijjk · 2025-01-24T20:55:11Z

Stats from current PR

Default Build (Increase detected ⚠️)

General

	vercel/next.js canary	vercel/next.js ijjk/use-rspack-for-prebundle	Change
buildDuration	20.3s	16.5s	N/A
buildDurationCached	16.3s	12.9s	N/A
nodeModulesSize	419 MB	389 MB	N/A
nextStartRea..uration (ms)	439ms	442ms	N/A

Client Bundles (main, webpack)

	vercel/next.js canary	vercel/next.js ijjk/use-rspack-for-prebundle	Change
5306-HASH.js gzip	54.1 kB	54.1 kB	N/A
8276.HASH.js gzip	169 B	168 B	N/A
8377-HASH.js gzip	5.46 kB	5.46 kB	N/A
bccd1874-HASH.js gzip	52.9 kB	52.9 kB	N/A
framework-HASH.js gzip	57.5 kB	57.5 kB	N/A
main-app-HASH.js gzip	240 B	242 B	N/A
main-HASH.js gzip	34.6 kB	34.6 kB	N/A
webpack-HASH.js gzip	1.71 kB	1.71 kB	N/A
Overall change	0 B	0 B	✓

Legacy Client Bundles (polyfills)

	vercel/next.js canary	vercel/next.js ijjk/use-rspack-for-prebundle	Change
polyfills-HASH.js gzip	39.4 kB	39.4 kB	✓
Overall change	39.4 kB	39.4 kB	✓

Client Pages

	vercel/next.js canary	vercel/next.js ijjk/use-rspack-for-prebundle	Change
_app-HASH.js gzip	193 B	193 B	✓
_error-HASH.js gzip	193 B	193 B	✓
amp-HASH.js gzip	512 B	510 B	N/A
css-HASH.js gzip	343 B	342 B	N/A
dynamic-HASH.js gzip	1.84 kB	1.84 kB	✓
edge-ssr-HASH.js gzip	265 B	265 B	✓
head-HASH.js gzip	363 B	362 B	N/A
hooks-HASH.js gzip	393 B	392 B	N/A
image-HASH.js gzip	4.59 kB	4.58 kB	N/A
index-HASH.js gzip	268 B	268 B	✓
link-HASH.js gzip	2.35 kB	2.35 kB	N/A
routerDirect..HASH.js gzip	328 B	328 B	✓
script-HASH.js gzip	397 B	397 B	✓
withRouter-HASH.js gzip	323 B	326 B	N/A
1afbb74e6ecf..834.css gzip	106 B	106 B	✓
Overall change	3.59 kB	3.59 kB	✓

Client Build Manifests

	vercel/next.js canary	vercel/next.js ijjk/use-rspack-for-prebundle	Change
_buildManifest.js gzip	748 B	747 B	N/A
Overall change	0 B	0 B	✓

Rendered Page Sizes

	vercel/next.js canary	vercel/next.js ijjk/use-rspack-for-prebundle	Change
index.html gzip	523 B	523 B	✓
link.html gzip	538 B	539 B	N/A
withRouter.html gzip	518 B	521 B	N/A
Overall change	523 B	523 B	✓

Edge SSR bundle Size

	vercel/next.js canary	vercel/next.js ijjk/use-rspack-for-prebundle	Change
edge-ssr.js gzip	129 kB	129 kB	N/A
page.js gzip	210 kB	210 kB	N/A
Overall change	0 B	0 B	✓

Middleware size

	vercel/next.js canary	vercel/next.js ijjk/use-rspack-for-prebundle	Change
middleware-b..fest.js gzip	669 B	665 B	N/A
middleware-r..fest.js gzip	155 B	156 B	N/A
middleware.js gzip	31.3 kB	31.3 kB	N/A
edge-runtime..pack.js gzip	844 B	844 B	✓
Overall change	844 B	844 B	✓

Next Runtimes

	vercel/next.js canary	vercel/next.js ijjk/use-rspack-for-prebundle	Change
274-experime...dev.js gzip	322 B	N/A	N/A
274.runtime.dev.js gzip	314 B	N/A	N/A
app-page-exp...dev.js gzip	378 kB	308 kB	N/A
app-page-exp..prod.js gzip	132 kB	131 kB	N/A
app-page-tur..prod.js gzip	145 kB	144 kB	N/A
app-page-tur..prod.js gzip	141 kB	140 kB	N/A
app-page.run...dev.js gzip	365 kB	300 kB	N/A
app-page.run..prod.js gzip	128 kB	128 kB	N/A
app-route-ex...dev.js gzip	37.6 kB	31.8 kB	N/A
app-route-ex..prod.js gzip	25.6 kB	25 kB	N/A
app-route-tu..prod.js gzip	25.6 kB	25 kB	N/A
app-route-tu..prod.js gzip	25.4 kB	24.8 kB	N/A
app-route.ru...dev.js gzip	39.2 kB	33.1 kB	N/A
app-route.ru..prod.js gzip	25.4 kB	24.8 kB	N/A
pages-api-tu..prod.js gzip	9.69 kB	8.81 kB	N/A
pages-api.ru...dev.js gzip	11.6 kB	9.82 kB	N/A
pages-api.ru..prod.js gzip	9.68 kB	8.8 kB	N/A
pages-turbo...prod.js gzip	21.9 kB	21.6 kB	N/A
pages.runtim...dev.js gzip	27.7 kB	26.1 kB	N/A
pages.runtim..prod.js gzip	21.9 kB	21.6 kB	N/A
server.runti..prod.js gzip	916 kB	73.7 kB	N/A
dist_client_...dev.js gzip	N/A	314 B	N/A
dist_client_...dev.js gzip	N/A	307 B	N/A
Overall change	0 B	0 B	✓

build cache Overall increase ⚠️

	vercel/next.js canary	vercel/next.js ijjk/use-rspack-for-prebundle	Change
0.pack gzip	2.1 MB	2.1 MB	⚠️ +182 B
index.pack gzip	75.6 kB	74.4 kB	N/A
Overall change	2.1 MB	2.1 MB	⚠️ +182 B

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+"use strict";exports.ids=["dist_client_dev_noop-turbopack-hmr_js"],exports.modules={"./dist/client/dev/noop-turbopack-hmr.js":function(e,t){function o(){}Object.defineProperty(t,"__esModule",{value:!0}),Object.defineProperty(t,"connect",{enumerable:!0,get:function(){return o}}),("function"==typeof t.default||"object"==typeof t.default&&null!==t.default)&&void 0===t.default.__esModule&&(Object.defineProperty(t.default,"__esModule",{value:!0}),Object.assign(t.default,t),e.exports=t.default)}};
+//# sourceMappingURL=dist_client_dev_noop-turbopack-hmr_js-experimental.runtime.dev.js.map
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+"use strict";exports.ids=["dist_client_dev_noop-turbopack-hmr_js"],exports.modules={"./dist/client/dev/noop-turbopack-hmr.js":function(e,t){function o(){}Object.defineProperty(t,"__esModule",{value:!0}),Object.defineProperty(t,"connect",{enumerable:!0,get:function(){return o}}),("function"==typeof t.default||"object"==typeof t.default&&null!==t.default)&&void 0===t.default.__esModule&&(Object.defineProperty(t.default,"__esModule",{value:!0}),Object.assign(t.default,t),e.exports=t.default)}};
+//# sourceMappingURL=dist_client_dev_noop-turbopack-hmr_js.runtime.dev.js.map
\ No newline at end of file

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Commit: a763930

ztanner

🚀

lubieowoce · 2025-01-24T22:19:27Z

test/integration/server-side-dev-errors/test/index.test.js

this doesn't look very important, but do we know why this changed?

the comment deleted kinda explains but it's internal next runtime stack frame so expected to change

lubieowoce · 2025-01-24T22:20:09Z

test/e2e/react-compiler/react-compiler.test.ts

+          process.env.__NEXT_EXPERIMENTAL_PPR
+          ? ''
+          : '\n  2 |'


do we know why this is different? that's a bit weird

Just ensures we keep mangling behavior prior to #75294 --------- Co-authored-by: Hendrik Liebau <[email protected]>

Update bundler for pre-bundling runtime

5105630

ijjk added created-by: Next.js team PRs by the Next.js team. type: next labels Jan 24, 2025

ijjk added 2 commits January 24, 2025 13:11

update compiled

c3a4497

fix error tests

2ee55d2

ijjk added the tests label Jan 24, 2025

ijjk marked this pull request as ready for review January 24, 2025 21:50

ijjk requested review from ztanner, huozhi and devjiwonchoi January 24, 2025 21:50

ppr

a763930

ztanner approved these changes Jan 24, 2025

View reviewed changes

ijjk enabled auto-merge (squash) January 24, 2025 22:17

ijjk merged commit 04c3f0b into canary Jan 24, 2025
130 checks passed

ijjk deleted the ijjk/use-rspack-for-prebundle branch January 24, 2025 22:19

lubieowoce reviewed Jan 24, 2025

View reviewed changes

ijjk mentioned this pull request Jan 24, 2025

Ensure mangling is disabled for dev runtime builds #75297

Merged

ijjk added a commit that referenced this pull request Jan 25, 2025

Ensure mangling is disabled for dev runtime builds (#75297)

98b0700

Just ensures we keep mangling behavior prior to #75294 --------- Co-authored-by: Hendrik Liebau <[email protected]>

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Update bundler for pre-bundling runtime #75294

Update bundler for pre-bundling runtime #75294

ijjk commented Jan 24, 2025 •

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Update bundler for pre-bundling runtime #75294

Update bundler for pre-bundling runtime #75294

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