perf(turbopack): Update rustc-hash from 1.1.0 to 2.1.0

[bgw]

Replace hash with faster and better finalized hash. This replaces the previous "fxhash" algorithm originating in Firefox with a custom hasher designed and implemented by Orson Peters (orlp). It was measured to have slightly better performance for rustc, has better theoretical properties and also includes a significantly better string hasher.

https://github.com/rust-lang/rustc-hash/blob/master/CHANGELOG.md

Benchmarks

Any perf difference either way is too small to be easily measured. Benchmarks here technically show a tiny regression, but that's well within the run-to-run variance I've observed.

rustc-hash 1.1.0

$ hyperfine --warmup 1 --runs 5 --prepare 'rm -rf .next' 'TURBOPACK=1 TURBOPACK_BUILD=1 TURBO_ENGINE_READ_ONLY=1 pnpm next build --experimental-build-mode=compile'

Benchmark 1: TURBOPACK=1 TURBOPACK_BUILD=1 TURBO_ENGINE_READ_ONLY=1 pnpm next build --experimental-build-mode=compile
  Time (mean ± σ):     26.736 s ±  0.294 s    [User: 122.811 s, System: 15.908 s]
  Range (min … max):   26.340 s … 27.165 s    5 runs

rustc-hash 2.1.0

$ hyperfine --warmup 1 --runs 5 --prepare 'rm -rf .next' 'TURBOPACK=1 TURBOPACK_BUILD=1 TURBO_ENGINE_READ_ONLY=1 pnpm next build --experimental-build-mode=compile'

Benchmark 1: TURBOPACK=1 TURBOPACK_BUILD=1 TURBO_ENGINE_READ_ONLY=1 pnpm next build --experimental-build-mode=compile
  Time (mean ± σ):     27.206 s ±  0.540 s    [User: 126.145 s, System: 15.958 s]
  Range (min … max):   26.543 s … 27.894 s    5 runs

Closes PACK-3870

[bgw]

• perf(turbopack): Migrate as many data structures to FxHash as possible #75546
• refactor(turbopack): Define and use an FxDashMap alias everywhere #75538
• perf(next-custom-transforms): Replace non-Sync Rc<DashMap<_, _>> usage with Rc<RefCell<FxHashMap<_, _>>> #75534
• perf(turbopack): Update rustc-hash from 1.1.0 to 2.1.0 #75531 👈 (View in Graphite)
• chore(turbopack): Remove unmaintained fxhash crate, use rustc-hash instead #75530
• canary

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[ijjk]

Stats from current PR

Default Build (Increase detected ⚠️)

General

	vercel/next.js canary	vercel/next.js bgw/update-rustc-hash	Change
buildDuration	21.8s	20.6s	N/A
buildDurationCached	19.1s	16.5s	N/A
nodeModulesSize	391 MB	391 MB	✓
nextStartRea..uration (ms)	526ms	524ms	N/A

Client Bundles (main, webpack)

	vercel/next.js canary	vercel/next.js bgw/update-rustc-hash	Change
5306-HASH.js gzip	54 kB	54 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	34.5 kB	34.4 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 bgw/update-rustc-hash	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 bgw/update-rustc-hash	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 bgw/update-rustc-hash	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 bgw/update-rustc-hash	Change
index.html gzip	524 B	524 B	✓
link.html gzip	539 B	538 B	N/A
withRouter.html gzip	520 B	520 B	✓
Overall change	1.04 kB	1.04 kB	✓

Edge SSR bundle Size

	vercel/next.js canary	vercel/next.js bgw/update-rustc-hash	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 bgw/update-rustc-hash	Change
middleware-b..fest.js gzip	670 B	663 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 bgw/update-rustc-hash	Change
app-page-exp...dev.js gzip	385 kB	385 kB	✓
app-page-exp..prod.js gzip	132 kB	132 kB	✓
app-page-tur..prod.js gzip	145 kB	145 kB	✓
app-page-tur..prod.js gzip	141 kB	141 kB	✓
app-page.run...dev.js gzip	372 kB	372 kB	✓
app-page.run..prod.js gzip	128 kB	128 kB	✓
app-route-ex...dev.js gzip	39.3 kB	39.3 kB	✓
app-route-ex..prod.js gzip	25.6 kB	25.6 kB	✓
app-route-tu..prod.js gzip	25.6 kB	25.6 kB	✓
app-route-tu..prod.js gzip	25.4 kB	25.4 kB	✓
app-route.ru...dev.js gzip	40.8 kB	40.8 kB	✓
app-route.ru..prod.js gzip	25.4 kB	25.4 kB	✓
dist_client_...dev.js gzip	356 B	356 B	✓
dist_client_...dev.js gzip	349 B	349 B	✓
pages-api-tu..prod.js gzip	9.69 kB	9.69 kB	✓
pages-api.ru...dev.js gzip	11.8 kB	11.8 kB	✓
pages-api.ru..prod.js gzip	9.68 kB	9.68 kB	✓
pages-turbo...prod.js gzip	21.9 kB	21.9 kB	✓
pages.runtim...dev.js gzip	31.5 kB	31.5 kB	✓
pages.runtim..prod.js gzip	21.9 kB	21.9 kB	✓
server.runti..prod.js gzip	60.2 kB	60.2 kB	✓
Overall change	1.65 MB	1.65 MB	✓

build cache Overall increase ⚠️

	vercel/next.js canary	vercel/next.js bgw/update-rustc-hash	Change
0.pack gzip	2.1 MB	2.1 MB	⚠️ +408 B
index.pack gzip	74.6 kB	75.7 kB	⚠️ +1.12 kB
Overall change	2.18 MB	2.18 MB	⚠️ +1.53 kB

Diff details

Diff for main-HASH.js

Diff too large to display

Commit: c4a1fce

[ijjk]

Tests Passed

[bgw]

Merge activity

• Feb 3, 10:00 PM EST: A user merged this pull request with Graphite.