Add test to verify that inner caches are excluded from Resume Data Cache #75883
+73
−1
Conversation
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
Tests Passed |
Stats from current PRDefault Build (Increase detected
|
| vercel/next.js canary | vercel/next.js hl/rdc-test-inner-caches | Change | |
|---|---|---|---|
| buildDuration | 20.4s | 14.7s | N/A |
| buildDurationCached | 13.8s | 11.6s | N/A |
| nodeModulesSize | 393 MB | 393 MB | |
| nextStartRea..uration (ms) | 389ms | 384ms | N/A |
Client Bundles (main, webpack)
| vercel/next.js canary | vercel/next.js hl/rdc-test-inner-caches | Change | |
|---|---|---|---|
| 5306-HASH.js gzip | 54.2 kB | 54.2 kB | N/A |
| 8276.HASH.js gzip | 169 B | 168 B | N/A |
| 8377-HASH.js gzip | 5.46 kB | 5.46 kB | N/A |
| bccd1874-HASH.js gzip | 53 kB | 53 kB | ✓ |
| framework-HASH.js gzip | 57.5 kB | 57.5 kB | N/A |
| main-app-HASH.js gzip | 242 B | 241 B | N/A |
| main-HASH.js gzip | 34.5 kB | 34.5 kB | N/A |
| webpack-HASH.js gzip | 1.71 kB | 1.71 kB | N/A |
| Overall change | 53 kB | 53 kB | ✓ |
Legacy Client Bundles (polyfills)
| vercel/next.js canary | vercel/next.js hl/rdc-test-inner-caches | 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 hl/rdc-test-inner-caches | Change | |
|---|---|---|---|
| _app-HASH.js gzip | 193 B | 193 B | ✓ |
| _error-HASH.js gzip | 193 B | 193 B | ✓ |
| amp-HASH.js gzip | 512 B | 510 B | N/A |
| css-HASH.js gzip | 343 B | 342 B | N/A |
| dynamic-HASH.js gzip | 1.84 kB | 1.84 kB | ✓ |
| edge-ssr-HASH.js gzip | 265 B | 265 B | ✓ |
| head-HASH.js gzip | 363 B | 362 B | N/A |
| hooks-HASH.js gzip | 393 B | 392 B | N/A |
| image-HASH.js gzip | 4.59 kB | 4.58 kB | N/A |
| index-HASH.js gzip | 268 B | 268 B | ✓ |
| link-HASH.js gzip | 2.35 kB | 2.35 kB | N/A |
| routerDirect..HASH.js gzip | 328 B | 328 B | ✓ |
| script-HASH.js gzip | 397 B | 397 B | ✓ |
| withRouter-HASH.js gzip | 323 B | 326 B | N/A |
| 1afbb74e6ecf..834.css gzip | 106 B | 106 B | ✓ |
| Overall change | 3.59 kB | 3.59 kB | ✓ |
Client Build Manifests
| vercel/next.js canary | vercel/next.js hl/rdc-test-inner-caches | Change | |
|---|---|---|---|
| _buildManifest.js gzip | 748 B | 747 B | N/A |
| Overall change | 0 B | 0 B | ✓ |
Rendered Page Sizes
| vercel/next.js canary | vercel/next.js hl/rdc-test-inner-caches | Change | |
|---|---|---|---|
| index.html gzip | 523 B | 524 B | N/A |
| link.html gzip | 538 B | 539 B | N/A |
| withRouter.html gzip | 519 B | 520 B | N/A |
| Overall change | 0 B | 0 B | ✓ |
Edge SSR bundle Size
| vercel/next.js canary | vercel/next.js hl/rdc-test-inner-caches | 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 hl/rdc-test-inner-caches | Change | |
|---|---|---|---|
| middleware-b..fest.js gzip | 675 B | 672 B | N/A |
| middleware-r..fest.js gzip | 155 B | 156 B | N/A |
| middleware.js gzip | 31.3 kB | 31.3 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 hl/rdc-test-inner-caches | Change | |
|---|---|---|---|
| app-page-exp...dev.js gzip | 394 kB | 394 kB | N/A |
| app-page-exp..prod.js gzip | 132 kB | 132 kB | ✓ |
| app-page-tur..prod.js gzip | 145 kB | 145 kB | ✓ |
| app-page-tur..prod.js gzip | 141 kB | 141 kB | ✓ |
| app-page.run...dev.js gzip | 382 kB | 382 kB | N/A |
| app-page.run..prod.js gzip | 128 kB | 128 kB | ✓ |
| app-route-ex...dev.js gzip | 39.3 kB | 39.3 kB | ✓ |
| app-route-ex..prod.js gzip | 25.6 kB | 25.6 kB | ✓ |
| app-route-tu..prod.js gzip | 25.6 kB | 25.6 kB | ✓ |
| app-route-tu..prod.js gzip | 25.4 kB | 25.4 kB | ✓ |
| app-route.ru...dev.js gzip | 40.9 kB | 40.9 kB | ✓ |
| app-route.ru..prod.js gzip | 25.4 kB | 25.4 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 | 9.69 kB | 9.69 kB | ✓ |
| pages-api.ru...dev.js gzip | 11.8 kB | 11.8 kB | ✓ |
| pages-api.ru..prod.js gzip | 9.68 kB | 9.68 kB | ✓ |
| pages-turbo...prod.js gzip | 21.9 kB | 21.9 kB | ✓ |
| pages.runtim...dev.js gzip | 31.5 kB | 31.5 kB | ✓ |
| pages.runtim..prod.js gzip | 21.9 kB | 21.9 kB | ✓ |
| server.runti..prod.js gzip | 60.5 kB | 60.5 kB | ✓ |
| Overall change | 896 kB | 896 kB | ✓ |
build cache Overall increase ⚠️
| vercel/next.js canary | vercel/next.js hl/rdc-test-inner-caches | Change | |
|---|---|---|---|
| 0.pack gzip | 2.1 MB | 2.11 MB | |
| index.pack gzip | 74.4 kB | 75.6 kB | |
| Overall change | 2.18 MB | 2.18 MB |
Diff details
Diff for main-HASH.js
Diff too large to display
Resume Data Cache is used to provide cache consistency when resuming a partial prerendered static shell. When reading from this cache, it is not possible for there to be a miss because, regardless of the cache age, we always consume the cache entries on resume because they are temporarily bound to the static shell being served for this particular request. Since the cache entry can never miss, there is no need to store inner cache entries in the Resume Data Cache because the only time you would encounter an inner entry is if the outer entry had to revalidate. We have already optimized the Resume Data Cache by excluding writing to it during prerendering (and dev warmup rendering) if we're already inside a cache scope. We also handle that you can have an inner cache entry fill the backing cache and omit the RDC entry, and then later we encounter that same cache entry in the prerender scope, and even though we don't need to produce a new cache entry (it was already cached in the backing cache implementation), we do still write it to the Resume Data Cache. The test added in this PR verifies this behavior and ensures that we don't regress in the future. closes NAR-54
unstubbable
force-pushed
the
hl/rdc-test-inner-caches
branch
from
62ca8c0 to
ef02b2a
Compare
gnoff
approved these changes
Feb 10, 2025
Sign up for free
to subscribe to this conversation on GitHub.
Already have an account?
Sign in.
Add this suggestion to a batch that can be applied as a single commit.
This suggestion is invalid because no changes were made to the code.
Suggestions cannot be applied while the pull request is closed.
Suggestions cannot be applied while viewing a subset of changes.
Only one suggestion per line can be applied in a batch.
Add this suggestion to a batch that can be applied as a single commit.
Applying suggestions on deleted lines is not supported.
You must change the existing code in this line in order to create a valid suggestion.
Outdated suggestions cannot be applied.
This suggestion has been applied or marked resolved.
Suggestions cannot be applied from pending reviews.
Suggestions cannot be applied on multi-line comments.
Suggestions cannot be applied while the pull request is queued to merge.
Suggestion cannot be applied right now. Please check back later.
The Resume Data Cache (RDC) is used to provide cache consistency when resuming a partial prerendered static shell. When reading from this cache, it is not possible for there to be a miss because, regardless of the cache age, we always consume the cache entries on resume because they are temporarily bound to the static shell being served for this particular request. Since the cache entry can never miss, there is no need to store inner cache entries in the Resume Data Cache because the only time you would encounter an inner entry is if the outer entry had to revalidate.
We have already optimized the Resume Data Cache by excluding writing to it during prerendering (and dev warmup rendering) if we're already inside a cache scope. We also handle that you can have an inner cache entry fill the backing cache and omit the RDC entry, and then later we encounter that same cache entry in the prerender scope, and even though we don't need to produce a new cache entry (it was already cached in the backing cache implementation), we do still write it to the Resume Data Cache.
The test added in this PR verifies this behavior and ensures that we don't regress in the future.
closes NAR-54