Provide page runtime parsing utils

[huozhi]

x-ref: #31317

Adding utils for parsing page runtime and map runtime values with page mappings. Then later we could use it for detecting runtime of each entry.
Give the swc utils a dummy declaration to use with typescript easier

• Implements an existing feature request or RFC. Make sure the feature request has been accepted for implementation before opening a PR.
• unit tests added

[ijjk]

Failing test suites

Commit: 6a9e5eb

yarn testheadless test/integration/image-component/default/test/index.test.js

• Image Component Tests > dev mode > should warn at most once even after state change

Expand output

● Image Component Tests › dev mode › should warn at most once even after state change

expect(received).toMatch(expected)

Matcher error: received value must be a string

Received has value: undefined

  838 |         'Image with src "/test.png" has "sizes" property but it will be ignored.'
  839 |       )
> 840 |       expect(warnings[1]).toMatch(
      |                           ^
  841 |         'Image with src "/test.png" was detected as the Largest Contentful Paint (LCP).'
  842 |       )
  843 |       expect(warnings.length).toBe(2)

  at Object.<anonymous> (integration/image-component/default/test/index.test.js:840:27)

Read more about building and testing Next.js in contributing.md.

[ijjk]

Stats from current PR

Default Build (Decrease detected ✓)

General Overall increase ⚠️

	vercel/next.js canary	huozhi/next.js parse-page-runtime	Change
buildDuration	15.3s	15.5s	⚠️ +208ms
buildDurationCached	6.2s	6s	-122ms
nodeModulesSize	372 MB	372 MB	⚠️ +5.92 kB

Page Load Tests Overall decrease ⚠️

	vercel/next.js canary	huozhi/next.js parse-page-runtime	Change
/ failed reqs	0	0	✓
/ total time (seconds)	2.912	2.906	-0.01
/ avg req/sec	858.63	860.3	+1.67
/error-in-render failed reqs	0	0	✓
/error-in-render total time (seconds)	1.171	1.176	0
/error-in-render avg req/sec	2135.67	2126.56	⚠️ -9.11

Client Bundles (main, webpack)

	vercel/next.js canary	huozhi/next.js parse-page-runtime	Change
925.HASH.js gzip	179 B	179 B	✓
framework-HASH.js gzip	42 kB	42 kB	✓
main-HASH.js gzip	27.9 kB	27.9 kB	✓
webpack-HASH.js gzip	1.44 kB	1.44 kB	✓
Overall change	71.5 kB	71.5 kB	✓

Legacy Client Bundles (polyfills)

	vercel/next.js canary	huozhi/next.js parse-page-runtime	Change
polyfills-HASH.js gzip	31 kB	31 kB	✓
Overall change	31 kB	31 kB	✓

Client Pages

	vercel/next.js canary	huozhi/next.js parse-page-runtime	Change
_app-HASH.js gzip	1.36 kB	1.36 kB	✓
_error-HASH.js gzip	192 B	192 B	✓
amp-HASH.js gzip	309 B	309 B	✓
css-HASH.js gzip	327 B	327 B	✓
dynamic-HASH.js gzip	2.57 kB	2.57 kB	✓
head-HASH.js gzip	351 B	351 B	✓
hooks-HASH.js gzip	920 B	920 B	✓
image-HASH.js gzip	5.05 kB	5.05 kB	✓
index-HASH.js gzip	263 B	263 B	✓
link-HASH.js gzip	2.26 kB	2.26 kB	✓
routerDirect..HASH.js gzip	320 B	320 B	✓
script-HASH.js gzip	387 B	387 B	✓
withRouter-HASH.js gzip	319 B	319 B	✓
85e02e95b279..7e3.css gzip	107 B	107 B	✓
Overall change	14.7 kB	14.7 kB	✓

Client Build Manifests

	vercel/next.js canary	huozhi/next.js parse-page-runtime	Change
_buildManifest.js gzip	459 B	459 B	✓
Overall change	459 B	459 B	✓

Rendered Page Sizes

	vercel/next.js canary	huozhi/next.js parse-page-runtime	Change
index.html gzip	533 B	533 B	✓
link.html gzip	546 B	546 B	✓
withRouter.html gzip	527 B	527 B	✓
Overall change	1.61 kB	1.61 kB	✓

---

Default Build with SWC (Increase detected ⚠️)

General Overall increase ⚠️

	vercel/next.js canary	huozhi/next.js parse-page-runtime	Change
buildDuration	18.2s	18.5s	⚠️ +295ms
buildDurationCached	6.2s	6s	-211ms
nodeModulesSize	372 MB	372 MB	⚠️ +5.92 kB

Page Load Tests Overall increase ✓

	vercel/next.js canary	huozhi/next.js parse-page-runtime	Change
/ failed reqs	0	0	✓
/ total time (seconds)	2.925	2.917	-0.01
/ avg req/sec	854.57	857.07	+2.5
/error-in-render failed reqs	0	0	✓
/error-in-render total time (seconds)	1.207	1.187	-0.02
/error-in-render avg req/sec	2071.26	2106.95	+35.69

Client Bundles (main, webpack)

	vercel/next.js canary	huozhi/next.js parse-page-runtime	Change
925.HASH.js gzip	178 B	178 B	✓
framework-HASH.js gzip	42.3 kB	42.3 kB	✓
main-HASH.js gzip	28.1 kB	28.1 kB	✓
webpack-HASH.js gzip	1.45 kB	1.45 kB	✓
Overall change	72.1 kB	72.1 kB	✓

Legacy Client Bundles (polyfills)

	vercel/next.js canary	huozhi/next.js parse-page-runtime	Change
polyfills-HASH.js gzip	31 kB	31 kB	✓
Overall change	31 kB	31 kB	✓

Client Pages

	vercel/next.js canary	huozhi/next.js parse-page-runtime	Change
_app-HASH.js gzip	1.36 kB	1.36 kB	✓
_error-HASH.js gzip	179 B	179 B	✓
amp-HASH.js gzip	313 B	313 B	✓
css-HASH.js gzip	324 B	324 B	✓
dynamic-HASH.js gzip	2.56 kB	2.56 kB	✓
head-HASH.js gzip	351 B	351 B	✓
hooks-HASH.js gzip	921 B	921 B	✓
image-HASH.js gzip	5.2 kB	5.2 kB	✓
index-HASH.js gzip	261 B	261 B	✓
link-HASH.js gzip	2.33 kB	2.33 kB	✓
routerDirect..HASH.js gzip	322 B	322 B	✓
script-HASH.js gzip	388 B	388 B	✓
withRouter-HASH.js gzip	317 B	317 B	✓
85e02e95b279..7e3.css gzip	107 B	107 B	✓
Overall change	14.9 kB	14.9 kB	✓

Client Build Manifests

	vercel/next.js canary	huozhi/next.js parse-page-runtime	Change
_buildManifest.js gzip	456 B	456 B	✓
Overall change	456 B	456 B	✓

Rendered Page Sizes

	vercel/next.js canary	huozhi/next.js parse-page-runtime	Change
index.html gzip	531 B	531 B	✓
link.html gzip	545 B	545 B	✓
withRouter.html gzip	526 B	526 B	✓
Overall change	1.6 kB	1.6 kB	✓

Commit: 49c78be