use a shared worker pool for collecting page data and static page generation

[sokra]

this avoid loading all code twice and hopefully improving performance

[ijjk]

Failing test suites

Commit: 167bc27

test/acceptance/ReactRefreshLogBox.dev.test.js

• server-side only compilation errors

Expand output

● server-side only compilation errors

ScriptTimeoutError: script timeout
  (Session info: headless chrome=92.0.4515.131)

  72 |
  73 |             // Wait for application to re-hydrate:
> 74 |             await browser.executeAsyncScript(function () {
     |             ^
  75 |               var callback = arguments[arguments.length - 1]
  76 |               if (window.__NEXT_HYDRATED) {
  77 |                 callback()

  at Object.throwDecodedError (../node_modules/selenium-webdriver/lib/error.js:550:15)
  at parseHttpResponse (../node_modules/selenium-webdriver/lib/http.js:565:13)
  at Executor.execute (../node_modules/selenium-webdriver/lib/http.js:491:26)
      at runMicrotasks (<anonymous>)
  at Proxy.execute (../node_modules/selenium-webdriver/lib/webdriver.js:700:17)
  at Object.patch (acceptance/helpers.js:74:13)
  at Object.<anonymous> (acceptance/ReactRefreshLogBox.dev.test.js:1422:3)

[ijjk]

Stats from current PR

Default Build (Decrease detected ✓)

General Overall increase ⚠️

	vercel/next.js canary	vercel/next.js perf/shared-static-worker-pool	Change
buildDuration	14.3s	14.2s	-100ms
buildDurationCached	3.4s	3.2s	-167ms
nodeModulesSize	49.1 MB	49.1 MB	⚠️ +6.06 kB

Page Load Tests Overall decrease ⚠️

	vercel/next.js canary	vercel/next.js perf/shared-static-worker-pool	Change
/ failed reqs	0	0	✓
/ total time (seconds)	2.557	2.583	⚠️ +0.03
/ avg req/sec	977.56	967.74	⚠️ -9.82
/error-in-render failed reqs	0	0	✓
/error-in-render total time (seconds)	1.368	1.47	⚠️ +0.1
/error-in-render avg req/sec	1827.83	1701.01	⚠️ -126.82

Client Bundles (main, webpack, commons)

	vercel/next.js canary	vercel/next.js perf/shared-static-worker-pool	Change
745.HASH.js gzip	179 B	179 B	✓
framework-HASH.js gzip	42.2 kB	42.2 kB	✓
main-HASH.js gzip	23.1 kB	23.1 kB	✓
webpack-HASH.js gzip	1.5 kB	1.5 kB	✓
Overall change	67 kB	67 kB	✓

Legacy Client Bundles (polyfills)

	vercel/next.js canary	vercel/next.js perf/shared-static-worker-pool	Change
polyfills-HASH.js gzip	31.1 kB	31.1 kB	✓
Overall change	31.1 kB	31.1 kB	✓

Client Pages

	vercel/next.js canary	vercel/next.js perf/shared-static-worker-pool	Change
_app-HASH.js gzip	980 B	980 B	✓
_error-HASH.js gzip	194 B	194 B	✓
amp-HASH.js gzip	312 B	312 B	✓
css-HASH.js gzip	329 B	329 B	✓
dynamic-HASH.js gzip	2.52 kB	2.52 kB	✓
head-HASH.js gzip	350 B	350 B	✓
hooks-HASH.js gzip	904 B	904 B	✓
image-HASH.js gzip	4.13 kB	4.13 kB	✓
index-HASH.js gzip	261 B	261 B	✓
link-HASH.js gzip	1.66 kB	1.66 kB	✓
routerDirect..HASH.js gzip	319 B	319 B	✓
script-HASH.js gzip	387 B	387 B	✓
withRouter-HASH.js gzip	320 B	320 B	✓
bb14e60e810b..30f.css gzip	125 B	125 B	✓
Overall change	12.8 kB	12.8 kB	✓

Client Build Manifests

	vercel/next.js canary	vercel/next.js perf/shared-static-worker-pool	Change
_buildManifest.js gzip	491 B	491 B	✓
Overall change	491 B	491 B	✓

Rendered Page Sizes

	vercel/next.js canary	vercel/next.js perf/shared-static-worker-pool	Change
index.html gzip	532 B	532 B	✓
link.html gzip	544 B	544 B	✓
withRouter.html gzip	525 B	525 B	✓
Overall change	1.6 kB	1.6 kB	✓

---

Webpack 4 Mode (Decrease detected ✓)

General Overall increase ⚠️

	vercel/next.js canary	vercel/next.js perf/shared-static-worker-pool	Change
buildDuration	11.7s	11.9s	⚠️ +242ms
buildDurationCached	4.7s	4.7s	-15ms
nodeModulesSize	49.1 MB	49.1 MB	⚠️ +6.06 kB

Page Load Tests Overall decrease ⚠️

	vercel/next.js canary	vercel/next.js perf/shared-static-worker-pool	Change
/ failed reqs	0	0	✓
/ total time (seconds)	2.544	2.606	⚠️ +0.06
/ avg req/sec	982.68	959.41	⚠️ -23.27
/error-in-render failed reqs	0	0	✓
/error-in-render total time (seconds)	1.432	1.489	⚠️ +0.06
/error-in-render avg req/sec	1746.13	1679.21	⚠️ -66.92

Client Bundles (main, webpack, commons)

	vercel/next.js canary	vercel/next.js perf/shared-static-worker-pool	Change
17.HASH.js gzip	185 B	185 B	✓
677f882d2ed8..HASH.js gzip	14 kB	14 kB	✓
framework.HASH.js gzip	41.9 kB	41.9 kB	✓
main-HASH.js gzip	10.6 kB	10.6 kB	✓
webpack-HASH.js gzip	1.19 kB	1.19 kB	✓
Overall change	67.8 kB	67.8 kB	✓

Legacy Client Bundles (polyfills)

	vercel/next.js canary	vercel/next.js perf/shared-static-worker-pool	Change
polyfills-HASH.js gzip	31.3 kB	31.3 kB	✓
Overall change	31.3 kB	31.3 kB	✓

Client Pages

	vercel/next.js canary	vercel/next.js perf/shared-static-worker-pool	Change
_app-HASH.js gzip	965 B	965 B	✓
_error-HASH.js gzip	3.71 kB	3.71 kB	✓
amp-HASH.js gzip	552 B	552 B	✓
css-HASH.js gzip	333 B	333 B	✓
dynamic-HASH.js gzip	2.71 kB	2.71 kB	✓
head-HASH.js gzip	2.97 kB	2.97 kB	✓
hooks-HASH.js gzip	911 B	911 B	✓
index-HASH.js gzip	231 B	231 B	✓
link-HASH.js gzip	1.64 kB	1.64 kB	✓
routerDirect..HASH.js gzip	298 B	298 B	✓
script-HASH.js gzip	2.95 kB	2.95 kB	✓
withRouter-HASH.js gzip	294 B	294 B	✓
e025d2764813..52f.css gzip	125 B	125 B	✓
Overall change	17.7 kB	17.7 kB	✓

Client Build Manifests

	vercel/next.js canary	vercel/next.js perf/shared-static-worker-pool	Change
_buildManifest.js gzip	498 B	498 B	✓
Overall change	498 B	498 B	✓

Rendered Page Sizes

	vercel/next.js canary	vercel/next.js perf/shared-static-worker-pool	Change
index.html gzip	577 B	577 B	✓
link.html gzip	590 B	590 B	✓
withRouter.html gzip	570 B	570 B	✓
Overall change	1.74 kB	1.74 kB	✓

Commit: 6487d28