perf: memory usage tweaks

[feedthejim]

This PR does two things:

• bring back the logic to restart the dev server when approaching 80% of the heap limits
• add some logic to increase the default Node.js memory usage to 50% of the available RAM

Tested manually

[ijjk]

Failing test suites

Commit: 8b9ddfb

pnpm test test/integration/build-indicator/test/index.test.js

• Build Activity Indicator > Enabled > Shows the build indicator when a page is built during navigation

Expand output

● Build Activity Indicator › Enabled › Shows the build indicator when a page is built during navigation

expect(received).toBe(expected) // Object.is equality

Expected: true
Received: false

  81 |       await waitFor(500)
  82 |       const wasVisible = await browser.eval('window.showedBuilder')
> 83 |       expect(wasVisible).toBe(true)
     |                          ^
  84 |       await browser.close()
  85 |     })
  86 |

  at Object.toBe (integration/build-indicator/test/index.test.js:83:26)

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

[ijjk]

Stats from current PR

Default Build

General Overall increase ⚠️

	vercel/next.js canary	vercel/next.js feedthejim/memory-tweaks	Change
buildDuration	10.7s	10.7s	N/A
buildDurationCached	6.2s	6.1s	N/A
nodeModulesSize	174 MB	174 MB	⚠️ +7.39 kB
nextStartRea..uration (ms)	499ms	496ms	N/A

Client Bundles (main, webpack)

	vercel/next.js canary	vercel/next.js feedthejim/memory-tweaks	Change
199-HASH.js gzip	27.6 kB	27.7 kB	N/A
3f784ff6-HASH.js gzip	53.3 kB	53.3 kB	✓
99.HASH.js gzip	182 B	182 B	✓
framework-HASH.js gzip	45.3 kB	45.3 kB	✓
main-app-HASH.js gzip	253 B	252 B	N/A
main-HASH.js gzip	32.9 kB	32.9 kB	N/A
webpack-HASH.js gzip	1.75 kB	1.75 kB	N/A
Overall change	98.8 kB	98.8 kB	✓

Legacy Client Bundles (polyfills)

	vercel/next.js canary	vercel/next.js feedthejim/memory-tweaks	Change
polyfills-HASH.js gzip	31 kB	31 kB	✓
Overall change	31 kB	31 kB	✓

Client Pages

	vercel/next.js canary	vercel/next.js feedthejim/memory-tweaks	Change
_app-HASH.js gzip	206 B	205 B	N/A
_error-HASH.js gzip	182 B	180 B	N/A
amp-HASH.js gzip	506 B	505 B	N/A
css-HASH.js gzip	322 B	323 B	N/A
dynamic-HASH.js gzip	2.57 kB	2.57 kB	N/A
edge-ssr-HASH.js gzip	260 B	259 B	N/A
head-HASH.js gzip	350 B	350 B	✓
hooks-HASH.js gzip	369 B	369 B	✓
image-HASH.js gzip	4.36 kB	4.36 kB	N/A
index-HASH.js gzip	256 B	256 B	✓
link-HASH.js gzip	2.64 kB	2.63 kB	N/A
routerDirect..HASH.js gzip	312 B	311 B	N/A
script-HASH.js gzip	385 B	384 B	N/A
withRouter-HASH.js gzip	307 B	308 B	N/A
1afbb74e6ecf..834.css gzip	106 B	106 B	✓
Overall change	1.08 kB	1.08 kB	✓

Client Build Manifests

	vercel/next.js canary	vercel/next.js feedthejim/memory-tweaks	Change
_buildManifest.js gzip	484 B	482 B	N/A
Overall change	0 B	0 B	✓

Rendered Page Sizes

	vercel/next.js canary	vercel/next.js feedthejim/memory-tweaks	Change
index.html gzip	529 B	528 B	N/A
link.html gzip	541 B	543 B	N/A
withRouter.html gzip	523 B	522 B	N/A
Overall change	0 B	0 B	✓

Edge SSR bundle Size

	vercel/next.js canary	vercel/next.js feedthejim/memory-tweaks	Change
edge-ssr.js gzip	93.8 kB	93.8 kB	N/A
page.js gzip	155 kB	155 kB	N/A
Overall change	0 B	0 B	✓

Middleware size

	vercel/next.js canary	vercel/next.js feedthejim/memory-tweaks	Change
middleware-b..fest.js gzip	626 B	623 B	N/A
middleware-r..fest.js gzip	150 B	151 B	N/A
middleware.js gzip	22.9 kB	22.9 kB	N/A
edge-runtime..pack.js gzip	1.92 kB	1.92 kB	✓
Overall change	1.92 kB	1.92 kB	✓

Commit: 8b9ddfb

The base branch was changed.