Eagerly load swc bindings for wasm fallback for jest #36784
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ijjk
requested review from
huozhi,
padmaia,
shuding and
timneutkens
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Stats from current PRDefault BuildGeneral Overall increase
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| vercel/next.js canary | ijjk/next.js update/eagerly-load-bindings | Change | |
|---|---|---|---|
| buildDuration | 18.7s | 18.9s | |
| buildDurationCached | 7.4s | 7.2s | -243ms |
| nodeModulesSize | 475 MB | 475 MB |
Page Load Tests Overall increase ✓
| vercel/next.js canary | ijjk/next.js update/eagerly-load-bindings | Change | |
|---|---|---|---|
| / failed reqs | 0 | 0 | ✓ |
| / total time (seconds) | 5.051 | 5.049 | 0 |
| / avg req/sec | 494.99 | 495.13 | +0.14 |
| /error-in-render failed reqs | 0 | 0 | ✓ |
| /error-in-render total time (seconds) | 2.042 | 2.041 | 0 |
| /error-in-render avg req/sec | 1224.37 | 1225.15 | +0.78 |
Client Bundles (main, webpack)
| vercel/next.js canary | ijjk/next.js update/eagerly-load-bindings | Change | |
|---|---|---|---|
| 925.HASH.js gzip | 179 B | 179 B | ✓ |
| framework-HASH.js gzip | 42 kB | 42 kB | ✓ |
| main-HASH.js gzip | 28.8 kB | 28.8 kB | ✓ |
| webpack-HASH.js gzip | 1.44 kB | 1.44 kB | ✓ |
| Overall change | 72.5 kB | 72.5 kB | ✓ |
Legacy Client Bundles (polyfills)
| vercel/next.js canary | ijjk/next.js update/eagerly-load-bindings | Change | |
|---|---|---|---|
| polyfills-HASH.js gzip | 31 kB | 31 kB | ✓ |
| Overall change | 31 kB | 31 kB | ✓ |
Client Pages
| vercel/next.js canary | ijjk/next.js update/eagerly-load-bindings | Change | |
|---|---|---|---|
| _app-HASH.js gzip | 1.36 kB | 1.36 kB | ✓ |
| _error-HASH.js gzip | 193 B | 193 B | ✓ |
| amp-HASH.js gzip | 308 B | 308 B | ✓ |
| css-HASH.js gzip | 327 B | 327 B | ✓ |
| dynamic-HASH.js gzip | 2.69 kB | 2.69 kB | ✓ |
| head-HASH.js gzip | 359 B | 359 B | ✓ |
| hooks-HASH.js gzip | 920 B | 920 B | ✓ |
| image-HASH.js gzip | 5.7 kB | 5.7 kB | ✓ |
| index-HASH.js gzip | 263 B | 263 B | ✓ |
| link-HASH.js gzip | 2.64 kB | 2.64 kB | ✓ |
| routerDirect..HASH.js gzip | 320 B | 320 B | ✓ |
| script-HASH.js gzip | 391 B | 391 B | ✓ |
| withRouter-HASH.js gzip | 318 B | 318 B | ✓ |
| 85e02e95b279..7e3.css gzip | 107 B | 107 B | ✓ |
| Overall change | 15.9 kB | 15.9 kB | ✓ |
Client Build Manifests
| vercel/next.js canary | ijjk/next.js update/eagerly-load-bindings | Change | |
|---|---|---|---|
| _buildManifest.js gzip | 459 B | 459 B | ✓ |
| Overall change | 459 B | 459 B | ✓ |
Rendered Page Sizes
| vercel/next.js canary | ijjk/next.js update/eagerly-load-bindings | Change | |
|---|---|---|---|
| index.html gzip | 532 B | 532 B | ✓ |
| link.html gzip | 545 B | 545 B | ✓ |
| withRouter.html gzip | 527 B | 527 B | ✓ |
| Overall change | 1.6 kB | 1.6 kB | ✓ |
Default Build with SWC (Decrease detected ✓)
General Overall increase ⚠️
| vercel/next.js canary | ijjk/next.js update/eagerly-load-bindings | Change | |
|---|---|---|---|
| buildDuration | 21.3s | 21.5s | |
| buildDurationCached | 7.2s | 7.2s | -21ms |
| nodeModulesSize | 475 MB | 475 MB |
Page Load Tests Overall decrease ⚠️
| vercel/next.js canary | ijjk/next.js update/eagerly-load-bindings | Change | |
|---|---|---|---|
| / failed reqs | 0 | 0 | ✓ |
| / total time (seconds) | 5.122 | 5.162 | |
| / avg req/sec | 488.1 | 484.34 | |
| /error-in-render failed reqs | 0 | 0 | ✓ |
| /error-in-render total time (seconds) | 1.969 | 2.053 | |
| /error-in-render avg req/sec | 1269.8 | 1217.79 |
Client Bundles (main, webpack)
| vercel/next.js canary | ijjk/next.js update/eagerly-load-bindings | Change | |
|---|---|---|---|
| 925.HASH.js gzip | 178 B | 178 B | ✓ |
| framework-HASH.js gzip | 42.2 kB | 42.2 kB | ✓ |
| main-HASH.js gzip | 29.2 kB | 29.2 kB | ✓ |
| webpack-HASH.js gzip | 1.45 kB | 1.45 kB | ✓ |
| Overall change | 73.1 kB | 73.1 kB | ✓ |
Legacy Client Bundles (polyfills)
| vercel/next.js canary | ijjk/next.js update/eagerly-load-bindings | Change | |
|---|---|---|---|
| polyfills-HASH.js gzip | 31 kB | 31 kB | ✓ |
| Overall change | 31 kB | 31 kB | ✓ |
Client Pages
| vercel/next.js canary | ijjk/next.js update/eagerly-load-bindings | Change | |
|---|---|---|---|
| _app-HASH.js gzip | 1.35 kB | 1.35 kB | ✓ |
| _error-HASH.js gzip | 179 B | 179 B | ✓ |
| amp-HASH.js gzip | 312 B | 312 B | ✓ |
| css-HASH.js gzip | 324 B | 324 B | ✓ |
| dynamic-HASH.js gzip | 2.71 kB | 2.71 kB | ✓ |
| head-HASH.js gzip | 357 B | 357 B | ✓ |
| hooks-HASH.js gzip | 921 B | 921 B | ✓ |
| image-HASH.js gzip | 5.79 kB | 5.79 kB | ✓ |
| index-HASH.js gzip | 261 B | 261 B | ✓ |
| link-HASH.js gzip | 2.76 kB | 2.76 kB | ✓ |
| routerDirect..HASH.js gzip | 322 B | 322 B | ✓ |
| script-HASH.js gzip | 392 B | 392 B | ✓ |
| withRouter-HASH.js gzip | 317 B | 317 B | ✓ |
| 85e02e95b279..7e3.css gzip | 107 B | 107 B | ✓ |
| Overall change | 16.1 kB | 16.1 kB | ✓ |
Client Build Manifests
| vercel/next.js canary | ijjk/next.js update/eagerly-load-bindings | Change | |
|---|---|---|---|
| _buildManifest.js gzip | 456 B | 456 B | ✓ |
| Overall change | 456 B | 456 B | ✓ |
Rendered Page Sizes
| vercel/next.js canary | ijjk/next.js update/eagerly-load-bindings | Change | |
|---|---|---|---|
| index.html gzip | 530 B | 530 B | ✓ |
| link.html gzip | 544 B | 544 B | ✓ |
| withRouter.html gzip | 527 B | 527 B | ✓ |
| Overall change | 1.6 kB | 1.6 kB | ✓ |
timneutkens
approved these changes
May 12, 2022
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Follow-up to #36612 this updates to eagerly load the swc bindings unless babel is being used so that we don't wait for the transform calls to initialize swc. Eagerly loading in jest also allows us to fallback to the wasm bindings when previously we couldn't since they needed to wait for the import.