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Prerender during same pass if blocked anyway #30879

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acdlite
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@acdlite acdlite commented Sep 4, 2024

If something suspends in the shell — i.e. we won't replace the suspended content with a fallback — we might as well prerender the siblings during the current render pass, instead of spawning a separate prerender pass.

This is implemented by setting the "is prerendering" flag to true whenever we suspend in the shell. But only if we haven't already skipped over some siblings, because if so, then we need to schedule a separate prerender pass regardless.

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react-sizebot commented Sep 4, 2024

Comparing: e10e868...0af051e

Critical size changes

Includes critical production bundles, as well as any change greater than 2%:

Name +/- Base Current +/- gzip Base gzip Current gzip
oss-stable/react-dom/cjs/react-dom.production.js = 6.68 kB 6.68 kB = 1.82 kB 1.82 kB
oss-stable/react-dom/cjs/react-dom-client.production.js = 503.23 kB 503.23 kB = 90.22 kB 90.22 kB
oss-experimental/react-dom/cjs/react-dom.production.js = 6.69 kB 6.69 kB = 1.83 kB 1.83 kB
oss-experimental/react-dom/cjs/react-dom-client.production.js +0.03% 510.44 kB 510.58 kB +0.02% 91.42 kB 91.43 kB
facebook-www/ReactDOM-prod.classic.js +0.02% 598.56 kB 598.70 kB +0.01% 106.05 kB 106.06 kB
facebook-www/ReactDOM-prod.modern.js +0.02% 574.84 kB 574.99 kB +0.02% 102.22 kB 102.24 kB

Significant size changes

Includes any change greater than 0.2%:

(No significant changes)

Generated by 🚫 dangerJS against a8b3623

If something suspends in the shell — i.e. we won't replace the
suspended content with a fallback — we might as well prerender the
siblings during the current render pass, instead of spawning a
separate prerender pass.

This is implemented by setting the "is prerendering" flag to true
whenever we suspend in the shell. But only if we haven't already skipped
over some siblings, because if so, then we need to schedule a separate
prerender pass regardless.
@acdlite acdlite merged commit 66cf2cf into facebook:main Sep 10, 2024
184 checks passed
github-actions bot pushed a commit that referenced this pull request Sep 10, 2024
If something suspends in the shell — i.e. we won't replace the suspended
content with a fallback — we might as well prerender the siblings during
the current render pass, instead of spawning a separate prerender pass.

This is implemented by setting the "is prerendering" flag to true
whenever we suspend in the shell. But only if we haven't already skipped
over some siblings, because if so, then we need to schedule a separate
prerender pass regardless.

DiffTrain build for commit 66cf2cf.
github-actions bot pushed a commit that referenced this pull request Sep 10, 2024
If something suspends in the shell — i.e. we won't replace the suspended
content with a fallback — we might as well prerender the siblings during
the current render pass, instead of spawning a separate prerender pass.

This is implemented by setting the "is prerendering" flag to true
whenever we suspend in the shell. But only if we haven't already skipped
over some siblings, because if so, then we need to schedule a separate
prerender pass regardless.

DiffTrain build for [66cf2cf](66cf2cf)
gnoff pushed a commit to vercel/next.js that referenced this pull request Sep 12, 2024
**breaking change for canary users: Bumps peer dependency of React from
`19.0.0-rc-7771d3a7-20240827` to `19.0.0-rc-94e652d5-20240912`**

[diff
facebook/react@7771d3a7...94e652d5](facebook/react@7771d3a...94e652d)

<details>
<summary>React upstream changes</summary>

- facebook/react#30952
- facebook/react#30950
- facebook/react#30946
- facebook/react#30934
- facebook/react#30947
- facebook/react#30945
- facebook/react#30938
- facebook/react#30936
- facebook/react#30879
- facebook/react#30888
- facebook/react#30931
- facebook/react#30930
- facebook/react#30832
- facebook/react#30929
- facebook/react#30926
- facebook/react#30925
- facebook/react#30905
- facebook/react#30900
- facebook/react#30910
- facebook/react#30906
- facebook/react#30899
- facebook/react#30919
- facebook/react#30708
- facebook/react#30907
- facebook/react#30897
- facebook/react#30896
- facebook/react#30895
- facebook/react#30887
- facebook/react#30889
- facebook/react#30893
- facebook/react#30892
- facebook/react#30891
- facebook/react#30882
- facebook/react#30881
- facebook/react#30870
- facebook/react#30849
- facebook/react#30878
- facebook/react#30865
- facebook/react#30869
- facebook/react#30875
- facebook/react#30800
- facebook/react#30762
- facebook/react#30831
- facebook/react#30866
- facebook/react#30853
- facebook/react#30850
- facebook/react#30847
- facebook/react#30842
- facebook/react#30837
- facebook/react#30848
- facebook/react#30844
- facebook/react#30839
- facebook/react#30802
- facebook/react#30841
- facebook/react#30827
- facebook/react#30826
- facebook/react#30825
- facebook/react#30824
- facebook/react#30840
- facebook/react#30838
- facebook/react#30836
- facebook/react#30819
- facebook/react#30816
- facebook/react#30814
- facebook/react#30813
- facebook/react#30812
- facebook/react#30811

</details>

---------

Co-authored-by: vercel-release-bot <infra+release@vercel.com>
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4 participants