Turbopack: Implement build worker

[timneutkens]

What?

Runs Turbopack in a separate child process so that e.g. memory usage can be cleaned up before continuing with the rest of the Next.js build. This will lower the peak memory consumption given that before this change the Turbopack cache was kept around until the end of the build.

[timneutkens]

• Turbopack: Implement build worker #75391 👈 (View in Graphite)
• Turbopack: Move build to separate file #75390
• canary

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[ijjk]

Tests Passed

[ijjk]

Stats from current PR

Default Build

General Overall increase ⚠️

	vercel/next.js canary	vercel/next.js 01-28-turbopack_implement_build_worker	Change
buildDuration	27.8s	24.9s	N/A
buildDurationCached	28.2s	21.8s	N/A
nodeModulesSize	392 MB	392 MB	⚠️ +31.8 kB
nextStartRea..uration (ms)	794ms	735ms	N/A

Client Bundles (main, webpack)

	vercel/next.js canary	vercel/next.js 01-28-turbopack_implement_build_worker	Change
5306-HASH.js gzip	54 kB	53.9 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	✓
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	34.5 kB	34.4 kB	N/A
webpack-HASH.js gzip	1.71 kB	1.71 kB	N/A
Overall change	52.9 kB	52.9 kB	✓

Legacy Client Bundles (polyfills)

	vercel/next.js canary	vercel/next.js 01-28-turbopack_implement_build_worker	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 01-28-turbopack_implement_build_worker	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 01-28-turbopack_implement_build_worker	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 01-28-turbopack_implement_build_worker	Change
index.html gzip	523 B	523 B	✓
link.html gzip	538 B	538 B	✓
withRouter.html gzip	519 B	520 B	N/A
Overall change	1.06 kB	1.06 kB	✓

Edge SSR bundle Size

	vercel/next.js canary	vercel/next.js 01-28-turbopack_implement_build_worker	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 01-28-turbopack_implement_build_worker	Change
middleware-b..fest.js gzip	670 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 01-28-turbopack_implement_build_worker	Change
app-page-exp...dev.js gzip	386 kB	386 kB	✓
app-page-exp..prod.js gzip	131 kB	131 kB	✓
app-page-tur..prod.js gzip	144 kB	144 kB	✓
app-page-tur..prod.js gzip	140 kB	140 kB	✓
app-page.run...dev.js gzip	373 kB	373 kB	N/A
app-page.run..prod.js gzip	128 kB	128 kB	✓
app-route-ex...dev.js gzip	39.4 kB	39.4 kB	✓
app-route-ex..prod.js gzip	25 kB	25 kB	✓
app-route-tu..prod.js gzip	25 kB	25 kB	✓
app-route-tu..prod.js gzip	24.8 kB	24.8 kB	✓
app-route.ru...dev.js gzip	41 kB	41 kB	✓
app-route.ru..prod.js gzip	24.8 kB	24.8 kB	✓
dist_client_...dev.js gzip	326 B	326 B	✓
dist_client_...dev.js gzip	318 B	318 B	✓
pages-api-tu..prod.js gzip	8.81 kB	8.81 kB	✓
pages-api.ru...dev.js gzip	11.5 kB	11.5 kB	✓
pages-api.ru..prod.js gzip	8.8 kB	8.8 kB	✓
pages-turbo...prod.js gzip	21.6 kB	21.6 kB	✓
pages.runtim...dev.js gzip	31.3 kB	31.3 kB	N/A
pages.runtim..prod.js gzip	21.6 kB	21.6 kB	✓
server.runti..prod.js gzip	73.7 kB	73.7 kB	✓
Overall change	1.26 MB	1.26 MB	✓

build cache

	vercel/next.js canary	vercel/next.js 01-28-turbopack_implement_build_worker	Change
0.pack gzip	2.11 MB	2.1 MB	N/A
index.pack gzip	76.2 kB	76.2 kB	N/A
Overall change	0 B	0 B	✓

Diff details

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Commit: bd0ad4c