[ppr] Improve experimental debugging

[wyattjoh]

This fixes a bug with the experimental PPR debugging where it previously always failed in production because the hydration script was always invoked even when the stream was terminated early due to the debugging state.

[wyattjoh]

• [ppr] Improve experimental debugging #76016 👈 (View in Graphite)
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[ijjk]

Tests Passed

[ijjk]

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Default Build

General

	vercel/next.js canary	vercel/next.js feat/improve-experimental-ppr-debugging	Change
buildDuration	27.9s	22s	N/A
buildDurationCached	20.3s	17.7s	N/A
nodeModulesSize	393 MB	393 MB	N/A
nextStartRea..uration (ms)	527ms	507ms	N/A

Client Bundles (main, webpack)

	vercel/next.js canary	vercel/next.js feat/improve-experimental-ppr-debugging	Change
5306-HASH.js gzip	55.1 kB	55.1 kB	N/A
7048.HASH.js gzip	168 B	168 B	✓
8377-HASH.js gzip	5.46 kB	5.46 kB	N/A
bccd1874-HASH.js gzip	53 kB	53 kB	N/A
framework-HASH.js gzip	57.5 kB	57.5 kB	N/A
main-app-HASH.js gzip	245 B	245 B	✓
main-HASH.js gzip	34.7 kB	34.7 kB	N/A
webpack-HASH.js gzip	1.71 kB	1.71 kB	✓
Overall change	2.12 kB	2.12 kB	✓

Legacy Client Bundles (polyfills)

	vercel/next.js canary	vercel/next.js feat/improve-experimental-ppr-debugging	Change
polyfills-HASH.js gzip	39.4 kB	39.4 kB	✓
Overall change	39.4 kB	39.4 kB	✓

Client Pages

	vercel/next.js canary	vercel/next.js feat/improve-experimental-ppr-debugging	Change
_app-HASH.js gzip	194 B	194 B	✓
_error-HASH.js gzip	193 B	192 B	N/A
amp-HASH.js gzip	513 B	511 B	N/A
css-HASH.js gzip	342 B	342 B	✓
dynamic-HASH.js gzip	1.84 kB	1.84 kB	N/A
edge-ssr-HASH.js gzip	265 B	264 B	N/A
head-HASH.js gzip	363 B	360 B	N/A
hooks-HASH.js gzip	393 B	390 B	N/A
image-HASH.js gzip	4.59 kB	4.59 kB	N/A
index-HASH.js gzip	268 B	266 B	N/A
link-HASH.js gzip	2.35 kB	2.35 kB	✓
routerDirect..HASH.js gzip	327 B	326 B	N/A
script-HASH.js gzip	397 B	397 B	✓
withRouter-HASH.js gzip	325 B	325 B	✓
1afbb74e6ecf..834.css gzip	106 B	106 B	✓
Overall change	3.72 kB	3.72 kB	✓

Client Build Manifests

	vercel/next.js canary	vercel/next.js feat/improve-experimental-ppr-debugging	Change
_buildManifest.js gzip	749 B	747 B	N/A
Overall change	0 B	0 B	✓

Rendered Page Sizes

	vercel/next.js canary	vercel/next.js feat/improve-experimental-ppr-debugging	Change
index.html gzip	522 B	521 B	N/A
link.html gzip	539 B	534 B	N/A
withRouter.html gzip	519 B	516 B	N/A
Overall change	0 B	0 B	✓

Edge SSR bundle Size

	vercel/next.js canary	vercel/next.js feat/improve-experimental-ppr-debugging	Change
edge-ssr.js gzip	130 kB	130 kB	N/A
page.js gzip	211 kB	211 kB	N/A
Overall change	0 B	0 B	✓

Middleware size

	vercel/next.js canary	vercel/next.js feat/improve-experimental-ppr-debugging	Change
middleware-b..fest.js gzip	675 B	673 B	N/A
middleware-r..fest.js gzip	155 B	156 B	N/A
middleware.js gzip	31.4 kB	31.4 kB	N/A
edge-runtime..pack.js gzip	844 B	844 B	✓
Overall change	844 B	844 B	✓

Next Runtimes

	vercel/next.js canary	vercel/next.js feat/improve-experimental-ppr-debugging	Change
app-page-exp...dev.js gzip	395 kB	395 kB	N/A
app-page-exp..prod.js gzip	133 kB	133 kB	N/A
app-page-tur..prod.js gzip	145 kB	145 kB	N/A
app-page-tur..prod.js gzip	141 kB	141 kB	N/A
app-page.run...dev.js gzip	382 kB	382 kB	N/A
app-page.run..prod.js gzip	129 kB	129 kB	N/A
app-route-ex...dev.js gzip	39.4 kB	39.4 kB	✓
app-route-ex..prod.js gzip	25.7 kB	25.7 kB	✓
app-route-tu..prod.js gzip	25.7 kB	25.7 kB	✓
app-route-tu..prod.js gzip	25.5 kB	25.5 kB	✓
app-route.ru...dev.js gzip	41 kB	41 kB	✓
app-route.ru..prod.js gzip	25.5 kB	25.5 kB	✓
dist_client_...dev.js gzip	356 B	356 B	✓
dist_client_...dev.js gzip	349 B	349 B	✓
pages-api-tu..prod.js gzip	9.72 kB	9.72 kB	✓
pages-api.ru...dev.js gzip	11.8 kB	11.8 kB	✓
pages-api.ru..prod.js gzip	9.72 kB	9.72 kB	✓
pages-turbo...prod.js gzip	22 kB	22 kB	✓
pages.runtim...dev.js gzip	31.6 kB	31.6 kB	✓
pages.runtim..prod.js gzip	22 kB	22 kB	✓
server.runti..prod.js gzip	61.2 kB	61.2 kB	N/A
Overall change	290 kB	290 kB	✓

build cache

	vercel/next.js canary	vercel/next.js feat/improve-experimental-ppr-debugging	Change
0.pack gzip	2.11 MB	2.11 MB	N/A
index.pack gzip	77.1 kB	75.9 kB	N/A
Overall change	0 B	0 B	✓

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Commit: 0606400