[Segment Cache] Skip dynamic request if possible #73540
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Tests Passed |
Stats from current PRDefault Build (Increase detected
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| vercel/next.js canary | acdlite/next.js segment-cache-skip-dynamic-request | Change | |
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| buildDuration | 20.5s | 17.6s | N/A |
| buildDurationCached | 16.7s | 14.6s | N/A |
| nodeModulesSize | 409 MB | 409 MB | |
| nextStartRea..uration (ms) | 470ms | 451ms | N/A |
Client Bundles (main, webpack) Overall increase ⚠️
| vercel/next.js canary | acdlite/next.js segment-cache-skip-dynamic-request | Change | |
|---|---|---|---|
| 1187-HASH.js gzip | 50.2 kB | 50.4 kB | |
| 8276.HASH.js gzip | 169 B | 168 B | N/A |
| 8377-HASH.js gzip | 5.3 kB | 5.3 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 | 233 B | 235 B | N/A |
| main-HASH.js gzip | 33.8 kB | 33.7 kB | N/A |
| webpack-HASH.js gzip | 1.71 kB | 1.71 kB | N/A |
| Overall change | 50.2 kB | 50.4 kB |
Legacy Client Bundles (polyfills)
| vercel/next.js canary | acdlite/next.js segment-cache-skip-dynamic-request | Change | |
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| polyfills-HASH.js gzip | 39.4 kB | 39.4 kB | ✓ |
| Overall change | 39.4 kB | 39.4 kB | ✓ |
Client Pages
| vercel/next.js canary | acdlite/next.js segment-cache-skip-dynamic-request | Change | |
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| _app-HASH.js gzip | 193 B | 193 B | ✓ |
| _error-HASH.js gzip | 193 B | 193 B | ✓ |
| amp-HASH.js gzip | 513 B | 511 B | N/A |
| css-HASH.js gzip | 343 B | 342 B | N/A |
| dynamic-HASH.js gzip | 1.84 kB | 1.84 kB | N/A |
| 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 | 4.44 kB | 4.43 kB | N/A |
| index-HASH.js gzip | 268 B | 268 B | ✓ |
| link-HASH.js gzip | 2.35 kB | 2.34 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 | 1.75 kB | 1.75 kB | ✓ |
Client Build Manifests
| vercel/next.js canary | acdlite/next.js segment-cache-skip-dynamic-request | Change | |
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| _buildManifest.js gzip | 746 B | 747 B | N/A |
| Overall change | 0 B | 0 B | ✓ |
Rendered Page Sizes
| vercel/next.js canary | acdlite/next.js segment-cache-skip-dynamic-request | Change | |
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| index.html gzip | 524 B | 521 B | N/A |
| link.html gzip | 537 B | 537 B | ✓ |
| withRouter.html gzip | 520 B | 519 B | N/A |
| Overall change | 537 B | 537 B | ✓ |
Edge SSR bundle Size
| vercel/next.js canary | acdlite/next.js segment-cache-skip-dynamic-request | Change | |
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| edge-ssr.js gzip | 128 kB | 128 kB | N/A |
| page.js gzip | 203 kB | 203 kB | N/A |
| Overall change | 0 B | 0 B | ✓ |
Middleware size
| vercel/next.js canary | acdlite/next.js segment-cache-skip-dynamic-request | Change | |
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| middleware-b..fest.js gzip | 668 B | 666 B | N/A |
| middleware-r..fest.js gzip | 155 B | 156 B | N/A |
| middleware.js gzip | 31 kB | 31 kB | N/A |
| edge-runtime..pack.js gzip | 844 B | 844 B | ✓ |
| Overall change | 844 B | 844 B | ✓ |
Next Runtimes
| vercel/next.js canary | acdlite/next.js segment-cache-skip-dynamic-request | Change | |
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| 797-experime...dev.js gzip | 322 B | 322 B | ✓ |
| 797.runtime.dev.js gzip | 314 B | 314 B | ✓ |
| app-page-exp...dev.js gzip | 322 kB | 322 kB | N/A |
| app-page-exp..prod.js gzip | 127 kB | 127 kB | ✓ |
| app-page-tur..prod.js gzip | 140 kB | 140 kB | ✓ |
| app-page-tur..prod.js gzip | 135 kB | 135 kB | ✓ |
| app-page.run...dev.js gzip | 312 kB | 312 kB | N/A |
| app-page.run..prod.js gzip | 122 kB | 122 kB | ✓ |
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| pages-api-tu..prod.js gzip | 9.56 kB | 9.56 kB | ✓ |
| pages-api.ru...dev.js gzip | 11.4 kB | 11.4 kB | ✓ |
| pages-api.ru..prod.js gzip | 9.56 kB | 9.56 kB | ✓ |
| pages-turbo...prod.js gzip | 21.3 kB | 21.3 kB | ✓ |
| pages.runtim...dev.js gzip | 27 kB | 27 kB | ✓ |
| pages.runtim..prod.js gzip | 21.3 kB | 21.3 kB | ✓ |
| server.runti..prod.js gzip | 916 kB | 916 kB | ✓ |
| Overall change | 1.72 MB | 1.72 MB | ✓ |
build cache Overall increase ⚠️
| vercel/next.js canary | acdlite/next.js segment-cache-skip-dynamic-request | Change | |
|---|---|---|---|
| 0.pack gzip | 2.04 MB | 2.04 MB | |
| index.pack gzip | 144 kB | 146 kB | |
| Overall change | 2.18 MB | 2.19 MB |
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During a navigation, if all the data has been prefetched, and the target route does not contain any dynamic data, then we should skip a request to the server. This uses the `isPartial` field I added in the previous PRs to track whether the prefetched data is complete or not.
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ztanner
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Dec 10, 2024
| @@ -413,6 +533,11 @@ function finishTaskUsingDynamicDataPayload( | |||
| dynamicData: CacheNodeSeedData, | |||
| dynamicHead: React.ReactNode | |||
| ) { | |||
| if (!task.needsDynamicRequest) { | |||
| // Everything in this subtree is already complete. Bail out. | |||
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how come we'd be finishing tasks with dynamic payload, if the task didn't need a dynamic request? Feels like this should have aborted earlier in the stack but maybe I'm misunderstanding it.
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I think in practice it never happens but there's nothing in the data structures that prevents it. So it's just defensive.
ztanner
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Dec 10, 2024
ijjk
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Dec 10, 2024
Fix type error introduced in #73540
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Dec 12, 2024
Based on: - #73540 --- Currently if you navigate to a partially static route, the server will always start rendering at the first segment that's not present on the previous page. However, it should really start rendering at the first *dynamic* segment — if the client has already prefetched a segment, and it's fully static, there's no reason to render it again during the dynamic server render. We can do this by sending a more specific Next-Router-State-Tree request header. Rather than send a tree that represents the previous route, we sent the tree of the target route, but with a `refetch` marker added to the first dynamic segment. (Without the refetch marker, the server would send back an empty response.) This is determined by diffing against both the previous route *and* the prefetch cache. For now, this only works up to the first dynamic segment inside the new subtree; once the server starts rendering along a path, it renders everything else along that path. We could improve this in the future to also omit static segments that appear inside a dynamic layout, though this would likely require a change to the Next-Router-State-Tree protocol.
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During a navigation, if all the data has been prefetched, and the target route does not contain any dynamic data, then we should skip a request to the server.
This uses the
isPartialfield I added in the previous PRs to track whether the prefetched data is complete or not.