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Make prerendering always non-blocking #31056

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merged 2 commits into from
Sep 25, 2024

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@acdlite acdlite commented Sep 24, 2024

Depends on


When a synchronous update suspends, and we prerender the siblings, the prerendering should be non-blocking so that we can immediately restart once the data arrives.

This happens automatically when there's a Suspense boundary, because we immediately commit the boundary and then proceed to a Retry render, which are always concurrent. When there's not a Suspense boundary, there is no Retry, so we need to take care to switch from the synchronous work loop to the concurrent one, to enable time slicing.

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react-sizebot commented Sep 24, 2024

Comparing: 3c7667a...7622167

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 = 1.83 kB 1.83 kB
oss-stable/react-dom/cjs/react-dom-client.production.js = 508.43 kB 507.15 kB = 90.91 kB 90.79 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 = 513.37 kB 512.08 kB = 91.63 kB 91.52 kB
facebook-www/ReactDOM-prod.classic.js +0.12% 602.96 kB 603.67 kB +0.19% 106.63 kB 106.83 kB
facebook-www/ReactDOM-prod.modern.js +0.13% 579.15 kB 579.89 kB +0.19% 102.71 kB 102.91 kB

Significant size changes

Includes any change greater than 0.2%:

Expand to show
Name +/- Base Current +/- gzip Base gzip Current gzip
facebook-www/ReactART-prod.modern.js +0.22% 352.31 kB 353.07 kB +0.31% 59.77 kB 59.95 kB
oss-experimental/react-art/cjs/react-art.development.js = 570.18 kB 568.98 kB = 92.24 kB 92.17 kB
react-native/implementations/ReactFabric-dev.js = 629.95 kB 628.51 kB = 103.24 kB 103.16 kB
react-native/implementations/ReactNativeRenderer-dev.js = 641.08 kB 639.55 kB = 105.25 kB 105.18 kB
oss-stable/react-dom/cjs/react-dom-profiling.profiling.js = 538.86 kB 537.57 kB = 95.70 kB 95.56 kB
oss-stable-rc/react-dom/cjs/react-dom-profiling.profiling.js = 538.76 kB 537.47 kB = 95.68 kB 95.54 kB
oss-stable-semver/react-dom/cjs/react-dom-profiling.profiling.js = 538.76 kB 537.47 kB = 95.68 kB 95.54 kB
oss-stable/react-reconciler/cjs/react-reconciler.development.js = 636.00 kB 634.45 kB = 102.17 kB 102.08 kB
oss-stable-rc/react-reconciler/cjs/react-reconciler.development.js = 635.98 kB 634.43 kB = 102.15 kB 102.06 kB
oss-stable-semver/react-reconciler/cjs/react-reconciler.development.js = 635.98 kB 634.43 kB = 102.15 kB 102.06 kB
oss-experimental/react-dom/cjs/react-dom-unstable_testing.production.js = 528.10 kB 526.81 kB = 95.26 kB 95.15 kB
oss-experimental/react-reconciler/cjs/react-reconciler.profiling.js = 422.76 kB 421.71 kB = 68.89 kB 68.85 kB
facebook-www/ReactTestRenderer-dev.classic.js = 573.17 kB 571.73 kB = 93.79 kB 93.67 kB
facebook-www/ReactTestRenderer-dev.modern.js = 573.16 kB 571.73 kB = 93.79 kB 93.67 kB
oss-experimental/react-dom/cjs/react-dom-client.production.js = 513.37 kB 512.08 kB = 91.63 kB 91.52 kB
oss-stable/react-dom/cjs/react-dom-client.production.js = 508.43 kB 507.15 kB = 90.91 kB 90.79 kB
oss-stable-rc/react-dom/cjs/react-dom-client.production.js = 508.33 kB 507.04 kB = 90.88 kB 90.77 kB
oss-stable-semver/react-dom/cjs/react-dom-client.production.js = 508.33 kB 507.04 kB = 90.88 kB 90.77 kB
facebook-react-native/react-test-renderer/cjs/ReactTestRenderer-dev.js = 578.95 kB 577.48 kB = 94.40 kB 94.31 kB
oss-experimental/react-test-renderer/cjs/react-test-renderer.development.js = 548.41 kB 546.97 kB = 89.67 kB 89.59 kB
oss-stable/react-test-renderer/cjs/react-test-renderer.development.js = 545.85 kB 544.41 kB = 89.26 kB 89.19 kB
oss-stable-rc/react-test-renderer/cjs/react-test-renderer.development.js = 545.78 kB 544.35 kB = 89.24 kB 89.16 kB
oss-stable-semver/react-test-renderer/cjs/react-test-renderer.development.js = 545.78 kB 544.35 kB = 89.24 kB 89.16 kB
oss-stable/react-art/cjs/react-art.development.js = 552.99 kB 551.44 kB = 89.57 kB 89.47 kB
oss-stable-rc/react-art/cjs/react-art.development.js = 552.93 kB 551.38 kB = 89.54 kB 89.44 kB
oss-stable-semver/react-art/cjs/react-art.development.js = 552.93 kB 551.38 kB = 89.54 kB 89.44 kB
oss-stable/react-reconciler/cjs/react-reconciler.production.js = 384.49 kB 383.21 kB = 62.94 kB 62.86 kB
oss-stable-rc/react-reconciler/cjs/react-reconciler.production.js = 384.46 kB 383.19 kB = 62.92 kB 62.84 kB
oss-stable-semver/react-reconciler/cjs/react-reconciler.production.js = 384.46 kB 383.19 kB = 62.92 kB 62.84 kB
oss-experimental/react-reconciler/cjs/react-reconciler.production.js = 389.57 kB 388.27 kB = 63.77 kB 63.68 kB
oss-stable/react-reconciler/cjs/react-reconciler.profiling.js = 410.76 kB 409.39 kB = 66.66 kB 66.56 kB
oss-stable-rc/react-reconciler/cjs/react-reconciler.profiling.js = 410.74 kB 409.37 kB = 66.64 kB 66.54 kB
oss-stable-semver/react-reconciler/cjs/react-reconciler.profiling.js = 410.74 kB 409.37 kB = 66.64 kB 66.54 kB
react-native/implementations/ReactNativeRenderer-profiling.js = 385.02 kB 383.73 kB = 66.73 kB 66.66 kB
react-native/implementations/ReactFabric-profiling.js = 375.36 kB 374.07 kB = 64.96 kB 64.88 kB
react-native/implementations/ReactNativeRenderer-prod.js = 359.77 kB 358.49 kB = 62.96 kB 62.89 kB
react-native/implementations/ReactFabric-prod.js = 350.11 kB 348.82 kB = 61.31 kB 61.22 kB
facebook-react-native/react-test-renderer/cjs/ReactTestRenderer-profiling.js = 344.80 kB 343.51 kB = 59.89 kB 59.82 kB
facebook-react-native/react-test-renderer/cjs/ReactTestRenderer-prod.js = 322.94 kB 321.66 kB = 56.86 kB 56.77 kB
oss-experimental/react-art/cjs/react-art.production.js = 302.84 kB 301.55 kB = 52.01 kB 51.93 kB
oss-stable/react-art/cjs/react-art.production.js = 298.33 kB 297.03 kB = 51.26 kB 51.16 kB
oss-stable-rc/react-art/cjs/react-art.production.js = 298.26 kB 296.97 kB = 51.24 kB 51.14 kB
oss-stable-semver/react-art/cjs/react-art.production.js = 298.26 kB 296.97 kB = 51.24 kB 51.14 kB
oss-experimental/react-test-renderer/cjs/react-test-renderer.production.js = 307.92 kB 306.55 kB = 54.44 kB 54.34 kB
oss-stable/react-test-renderer/cjs/react-test-renderer.production.js = 305.51 kB 304.14 kB = 53.98 kB 53.89 kB
oss-stable-rc/react-test-renderer/cjs/react-test-renderer.production.js = 305.44 kB 304.07 kB = 53.96 kB 53.87 kB
oss-stable-semver/react-test-renderer/cjs/react-test-renderer.production.js = 305.44 kB 304.07 kB = 53.96 kB 53.87 kB

Generated by 🚫 dangerJS against 4c71025

Neglected to wrap some places in the enableSiblingPrerendering flag.
When a synchronous update suspends, and we prerender the siblings, the
prerendering should be non-blocking so that we can immediately restart
once the data arrives.

This happens automatically when there's a Suspense boundary, because
we immediately commit the boundary and then proceed to a Retry render,
which are always concurrent. When there's not a Suspense boundary, there
is no Retry, so we need to take care to switch from the synchronous
work loop to the concurrent one, to enable time slicing.
@acdlite acdlite merged commit 0f1856c into facebook:main Sep 25, 2024
185 checks passed
github-actions bot pushed a commit that referenced this pull request Sep 25, 2024
When a synchronous update suspends, and we prerender the siblings, the
prerendering should be non-blocking so that we can immediately restart
once the data arrives.

This happens automatically when there's a Suspense boundary, because we
immediately commit the boundary and then proceed to a Retry render,
which are always concurrent. When there's not a Suspense boundary, there
is no Retry, so we need to take care to switch from the synchronous work
loop to the concurrent one, to enable time slicing.

DiffTrain build for commit 0f1856c.
github-actions bot pushed a commit that referenced this pull request Sep 25, 2024
When a synchronous update suspends, and we prerender the siblings, the
prerendering should be non-blocking so that we can immediately restart
once the data arrives.

This happens automatically when there's a Suspense boundary, because we
immediately commit the boundary and then proceed to a Retry render,
which are always concurrent. When there's not a Suspense boundary, there
is no Retry, so we need to take care to switch from the synchronous work
loop to the concurrent one, to enable time slicing.

DiffTrain build for [0f1856c](0f1856c)
rickhanlonii added a commit that referenced this pull request Sep 26, 2024
poteto pushed a commit that referenced this pull request Sep 26, 2024
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