Add experimental config for navigation raf test

[ijjk]

This adds a new experimental config for testing.

x-ref: slack thread

Closes NEXT-2644

[ijjk]

Stats from current PR

Default Build (Increase detected ⚠️)

General Overall increase ⚠️

	vercel/next.js canary	ijjk/next.js add/experimental-raf	Change
buildDuration	14s	14.1s	⚠️ +111ms
buildDurationCached	8.7s	6.4s	N/A
nodeModulesSize	197 MB	197 MB	⚠️ +8.87 kB
nextStartRea..uration (ms)	408ms	406ms	N/A

Client Bundles (main, webpack)

	vercel/next.js canary	ijjk/next.js add/experimental-raf	Change
2453-HASH.js gzip	30.4 kB	30.4 kB	N/A
3304.HASH.js gzip	181 B	181 B	✓
3f784ff6-HASH.js gzip	53.7 kB	53.7 kB	N/A
8299-HASH.js gzip	5.04 kB	5.04 kB	N/A
framework-HASH.js gzip	45.2 kB	45.2 kB	✓
main-app-HASH.js gzip	242 B	242 B	✓
main-HASH.js gzip	32.1 kB	32.2 kB	N/A
webpack-HASH.js gzip	1.7 kB	1.7 kB	N/A
Overall change	45.6 kB	45.6 kB	✓

Legacy Client Bundles (polyfills)

	vercel/next.js canary	ijjk/next.js add/experimental-raf	Change
polyfills-HASH.js gzip	31 kB	31 kB	✓
Overall change	31 kB	31 kB	✓

Client Pages

	vercel/next.js canary	ijjk/next.js add/experimental-raf	Change
_app-HASH.js gzip	196 B	197 B	N/A
_error-HASH.js gzip	184 B	184 B	✓
amp-HASH.js gzip	505 B	505 B	✓
css-HASH.js gzip	324 B	325 B	N/A
dynamic-HASH.js gzip	2.5 kB	2.5 kB	N/A
edge-ssr-HASH.js gzip	258 B	258 B	✓
head-HASH.js gzip	352 B	352 B	✓
hooks-HASH.js gzip	370 B	371 B	N/A
image-HASH.js gzip	4.2 kB	4.2 kB	✓
index-HASH.js gzip	259 B	259 B	✓
link-HASH.js gzip	2.67 kB	2.67 kB	N/A
routerDirect..HASH.js gzip	314 B	312 B	N/A
script-HASH.js gzip	386 B	386 B	✓
withRouter-HASH.js gzip	309 B	309 B	✓
1afbb74e6ecf..834.css gzip	106 B	106 B	✓
Overall change	6.56 kB	6.56 kB	✓

Client Build Manifests

	vercel/next.js canary	ijjk/next.js add/experimental-raf	Change
_buildManifest.js gzip	483 B	485 B	N/A
Overall change	0 B	0 B	✓

Rendered Page Sizes

	vercel/next.js canary	ijjk/next.js add/experimental-raf	Change
index.html gzip	528 B	528 B	✓
link.html gzip	541 B	539 B	N/A
withRouter.html gzip	525 B	523 B	N/A
Overall change	528 B	528 B	✓

Edge SSR bundle Size

	vercel/next.js canary	ijjk/next.js add/experimental-raf	Change
edge-ssr.js gzip	95.1 kB	95.1 kB	N/A
page.js gzip	3.06 kB	3.07 kB	N/A
Overall change	0 B	0 B	✓

Middleware size

	vercel/next.js canary	ijjk/next.js add/experimental-raf	Change
middleware-b..fest.js gzip	626 B	623 B	N/A
middleware-r..fest.js gzip	151 B	151 B	✓
middleware.js gzip	25.5 kB	25.5 kB	N/A
edge-runtime..pack.js gzip	839 B	839 B	✓
Overall change	990 B	990 B	✓

Next Runtimes

	vercel/next.js canary	ijjk/next.js add/experimental-raf	Change
app-page-exp...dev.js gzip	171 kB	171 kB	✓
app-page-exp..prod.js gzip	96.7 kB	96.7 kB	✓
app-page-tur..prod.js gzip	98.5 kB	98.5 kB	✓
app-page-tur..prod.js gzip	92.9 kB	92.9 kB	✓
app-page.run...dev.js gzip	150 kB	150 kB	✓
app-page.run..prod.js gzip	91.4 kB	91.4 kB	✓
app-route-ex...dev.js gzip	21.3 kB	21.3 kB	✓
app-route-ex..prod.js gzip	15 kB	15 kB	✓
app-route-tu..prod.js gzip	15 kB	15 kB	✓
app-route-tu..prod.js gzip	14.8 kB	14.8 kB	✓
app-route.ru...dev.js gzip	20.9 kB	20.9 kB	✓
app-route.ru..prod.js gzip	14.8 kB	14.8 kB	✓
pages-api-tu..prod.js gzip	9.51 kB	9.51 kB	✓
pages-api.ru...dev.js gzip	9.79 kB	9.79 kB	✓
pages-api.ru..prod.js gzip	9.51 kB	9.51 kB	✓
pages-turbo...prod.js gzip	22.3 kB	22.3 kB	✓
pages.runtim...dev.js gzip	23 kB	23 kB	✓
pages.runtim..prod.js gzip	22.3 kB	22.3 kB	✓
server.runti..prod.js gzip	50.7 kB	50.7 kB	✓
Overall change	950 kB	950 kB	✓

build cache Overall increase ⚠️

	vercel/next.js canary	ijjk/next.js add/experimental-raf	Change
0.pack gzip	1.56 MB	1.56 MB	⚠️ +1.52 kB
index.pack gzip	105 kB	104 kB	N/A
Overall change	1.56 MB	1.56 MB	⚠️ +1.52 kB

Diff details

Diff for page.js

Diff too large to display

Diff for middleware.js

Diff too large to display

Diff for edge-ssr.js

Diff too large to display

Diff for 2453-HASH.js

Diff too large to display

Diff for main-HASH.js

Diff too large to display

Commit: 1413a06

[franky47]

FYI, using this flag breaks the use of startTransition in nuqs: https://github.com/47ng/nuqs/actions/runs/8102536596/job/22145237505

The test in question calls the startTransition function of a React.useTransition hook when a search param is updated (using a router.replace call to refresh the RSC payload). Without the flag, the isLoading boolean switches correctly to true and back to false when the RSC payload has been received, but with the flag it never goes to true.

[ijjk]

Hi, thanks for providing that info! This was just a test so won't be affecting applications and to be safe we are removing this so it doesn't get leveraged

x-ref: #62834

[franky47]

Thanks for the follow-up!

Any ETA on 14.1.2? The partial 14.1.1 was still missing a good chunk of PRs, some of which impact nuqs and shallow routing in general (see #62098 (comment)).