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[Fizz] Prerender fallbacks before children #30483

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merged 1 commit into from
Jul 26, 2024

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@gnoff gnoff commented Jul 26, 2024

When prerendering it can be convenient to abort the prerender while rendering. However if any Suspense fallbacks have not yet rendered before the abort happens the fallback itself will error and cause the nearest parent Suspense boundary to render a fallback instead. Prerenders are by definition not time critical so the prioritization of children over fallbacks which makes sense for render isn't similarly motivated for prerender. Given this, this change updates fallback rendering during a prerender to attempt the fallback before attempting children.

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@facebook-github-bot facebook-github-bot added CLA Signed React Core Team Opened by a member of the React Core Team labels Jul 26, 2024
@gnoff gnoff requested a review from sebmarkbage July 26, 2024 16:50
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react-sizebot commented Jul 26, 2024

Comparing: b9af819...fc49605

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 = 501.46 kB 501.46 kB = 89.98 kB 89.98 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 = 506.28 kB 506.28 kB = 90.68 kB 90.67 kB
facebook-www/ReactDOM-prod.classic.js = 601.27 kB 601.27 kB = 106.28 kB 106.28 kB
facebook-www/ReactDOM-prod.modern.js = 577.38 kB 577.38 kB = 102.52 kB 102.52 kB
oss-stable-rc/react-server/cjs/react-server.production.js +2.23% 104.18 kB 106.50 kB +0.97% 19.38 kB 19.57 kB
oss-stable-semver/react-server/cjs/react-server.production.js +2.23% 104.18 kB 106.50 kB +0.97% 19.38 kB 19.57 kB
oss-stable/react-server/cjs/react-server.production.js +2.23% 104.18 kB 106.50 kB +0.97% 19.38 kB 19.57 kB
oss-experimental/react-server/cjs/react-server.production.js +2.13% 114.39 kB 116.83 kB +0.89% 20.91 kB 21.09 kB

Significant size changes

Includes any change greater than 0.2%:

Expand to show
Name +/- Base Current +/- gzip Base gzip Current gzip
oss-stable-rc/react-server/cjs/react-server.production.js +2.23% 104.18 kB 106.50 kB +0.97% 19.38 kB 19.57 kB
oss-stable-semver/react-server/cjs/react-server.production.js +2.23% 104.18 kB 106.50 kB +0.97% 19.38 kB 19.57 kB
oss-stable/react-server/cjs/react-server.production.js +2.23% 104.18 kB 106.50 kB +0.97% 19.38 kB 19.57 kB
oss-experimental/react-server/cjs/react-server.production.js +2.13% 114.39 kB 116.83 kB +0.89% 20.91 kB 21.09 kB
oss-stable-rc/react-server/cjs/react-server.development.js +0.85% 153.33 kB 154.63 kB +0.32% 28.31 kB 28.41 kB
oss-stable-semver/react-server/cjs/react-server.development.js +0.85% 153.33 kB 154.63 kB +0.32% 28.31 kB 28.41 kB
oss-stable/react-server/cjs/react-server.development.js +0.85% 153.33 kB 154.63 kB +0.32% 28.31 kB 28.41 kB
oss-experimental/react-server/cjs/react-server.development.js +0.78% 170.13 kB 171.45 kB +0.59% 30.71 kB 30.89 kB
facebook-www/ReactDOMServer-prod.classic.js +0.69% 207.78 kB 209.22 kB +0.28% 38.16 kB 38.26 kB
oss-stable-rc/react-dom/cjs/react-dom-server-legacy.browser.production.js +0.65% 197.83 kB 199.12 kB +0.30% 36.73 kB 36.84 kB
oss-stable-semver/react-dom/cjs/react-dom-server-legacy.browser.production.js +0.65% 197.83 kB 199.12 kB +0.30% 36.73 kB 36.84 kB
oss-stable/react-dom/cjs/react-dom-server-legacy.browser.production.js +0.65% 197.85 kB 199.14 kB +0.30% 36.75 kB 36.86 kB
oss-stable-rc/react-dom/cjs/react-dom-server-legacy.node.production.js +0.64% 202.22 kB 203.51 kB +0.29% 38.46 kB 38.57 kB
oss-stable-semver/react-dom/cjs/react-dom-server-legacy.node.production.js +0.64% 202.22 kB 203.51 kB +0.29% 38.46 kB 38.57 kB
oss-stable/react-dom/cjs/react-dom-server-legacy.node.production.js +0.64% 202.24 kB 203.53 kB +0.29% 38.49 kB 38.60 kB
facebook-www/ReactDOMServer-prod.modern.js +0.63% 205.51 kB 206.80 kB +0.28% 37.81 kB 37.92 kB
oss-experimental/react-dom/cjs/react-dom-server-legacy.browser.production.js +0.62% 212.07 kB 213.39 kB +0.32% 38.71 kB 38.83 kB
oss-experimental/react-dom/cjs/react-dom-server-legacy.node.production.js +0.61% 217.02 kB 218.33 kB +0.32% 40.56 kB 40.69 kB
oss-stable-rc/react-dom/cjs/react-dom-server.bun.production.js +0.51% 202.09 kB 203.12 kB +0.22% 37.89 kB 37.97 kB
oss-stable-semver/react-dom/cjs/react-dom-server.bun.production.js +0.51% 202.09 kB 203.12 kB +0.22% 37.89 kB 37.97 kB
oss-stable/react-dom/cjs/react-dom-server.bun.production.js +0.51% 202.15 kB 203.18 kB +0.22% 37.91 kB 38.00 kB
facebook-www/ReactDOMServerStreaming-prod.modern.js +0.49% 210.00 kB 211.03 kB +0.21% 39.34 kB 39.42 kB
oss-stable-rc/react-dom/cjs/react-dom-server.browser.production.js +0.48% 213.58 kB 214.61 kB +0.19% 39.10 kB 39.17 kB
oss-stable-semver/react-dom/cjs/react-dom-server.browser.production.js +0.48% 213.58 kB 214.61 kB +0.19% 39.10 kB 39.17 kB
oss-experimental/react-dom/cjs/react-dom-server.bun.production.js +0.48% 217.99 kB 219.05 kB +0.26% 39.99 kB 40.09 kB
oss-stable/react-dom/cjs/react-dom-server.browser.production.js +0.48% 213.65 kB 214.68 kB +0.19% 39.12 kB 39.19 kB
oss-stable-rc/react-dom/cjs/react-dom-server.node.production.js +0.48% 214.31 kB 215.34 kB +0.20% 39.70 kB 39.78 kB
oss-stable-semver/react-dom/cjs/react-dom-server.node.production.js +0.48% 214.31 kB 215.34 kB +0.20% 39.70 kB 39.78 kB
oss-stable/react-dom/cjs/react-dom-server.node.production.js +0.48% 214.37 kB 215.40 kB +0.20% 39.72 kB 39.80 kB
oss-stable-rc/react-dom/cjs/react-dom-server.edge.production.js +0.47% 218.46 kB 219.49 kB +0.20% 40.96 kB 41.04 kB
oss-stable-semver/react-dom/cjs/react-dom-server.edge.production.js +0.47% 218.46 kB 219.49 kB +0.20% 40.96 kB 41.04 kB
oss-stable/react-dom/cjs/react-dom-server.edge.production.js +0.47% 218.52 kB 219.55 kB +0.20% 40.98 kB 41.06 kB
oss-stable-rc/react-dom/cjs/react-dom-server-legacy.node.development.js +0.45% 341.68 kB 343.22 kB +0.23% 62.91 kB 63.06 kB
oss-stable-semver/react-dom/cjs/react-dom-server-legacy.node.development.js +0.45% 341.68 kB 343.22 kB +0.23% 62.91 kB 63.06 kB
oss-stable-rc/react-dom/cjs/react-dom-server-legacy.browser.development.js +0.45% 341.68 kB 343.23 kB +0.23% 62.91 kB 63.06 kB
oss-stable-semver/react-dom/cjs/react-dom-server-legacy.browser.development.js +0.45% 341.68 kB 343.23 kB +0.23% 62.91 kB 63.06 kB
oss-stable/react-dom/cjs/react-dom-server-legacy.node.development.js +0.45% 341.70 kB 343.25 kB +0.23% 62.93 kB 63.08 kB
oss-stable/react-dom/cjs/react-dom-server-legacy.browser.development.js +0.45% 341.70 kB 343.25 kB +0.23% 62.93 kB 63.08 kB
oss-experimental/react-dom/cjs/react-dom-server-legacy.node.development.js +0.45% 366.72 kB 368.38 kB +0.38% 66.09 kB 66.33 kB
oss-experimental/react-dom/cjs/react-dom-server-legacy.browser.development.js +0.45% 366.72 kB 368.38 kB +0.37% 66.09 kB 66.33 kB
facebook-www/ReactDOMServer-dev.classic.js +0.44% 358.44 kB 360.03 kB +0.14% 65.36 kB 65.46 kB
oss-experimental/react-dom/cjs/react-dom-server.browser.production.js +0.44% 237.83 kB 238.88 kB +0.25% 42.00 kB 42.10 kB
oss-experimental/react-dom/cjs/react-dom-server.node.production.js +0.44% 239.19 kB 240.24 kB +0.24% 43.22 kB 43.32 kB
oss-experimental/react-dom/cjs/react-dom-server.edge.production.js +0.43% 243.26 kB 244.31 kB +0.22% 43.97 kB 44.07 kB
oss-experimental/react-html/cjs/react-html.production.js +0.42% 200.27 kB 201.11 kB +0.11% 37.89 kB 37.93 kB
facebook-www/ReactDOMServer-dev.modern.js +0.42% 351.70 kB 353.17 kB +0.20% 64.27 kB 64.39 kB
oss-experimental/react-dom/cjs/react-dom-server.bun.development.js +0.37% 327.55 kB 328.75 kB +0.25% 63.06 kB 63.22 kB
oss-stable-rc/react-dom/cjs/react-dom-server.bun.development.js +0.36% 304.37 kB 305.48 kB +0.18% 59.88 kB 59.99 kB
oss-stable-semver/react-dom/cjs/react-dom-server.bun.development.js +0.36% 304.37 kB 305.48 kB +0.18% 59.88 kB 59.99 kB
oss-stable/react-dom/cjs/react-dom-server.bun.development.js +0.36% 304.43 kB 305.54 kB +0.19% 59.90 kB 60.01 kB
oss-stable-rc/react-dom/cjs/react-dom-server.node.development.js +0.35% 348.89 kB 350.10 kB +0.20% 63.51 kB 63.63 kB
oss-stable-semver/react-dom/cjs/react-dom-server.node.development.js +0.35% 348.89 kB 350.10 kB +0.20% 63.51 kB 63.63 kB
oss-stable/react-dom/cjs/react-dom-server.node.development.js +0.35% 348.95 kB 350.16 kB +0.20% 63.53 kB 63.66 kB
oss-stable-rc/react-dom/cjs/react-dom-server.browser.development.js +0.34% 353.78 kB 354.99 kB +0.20% 64.81 kB 64.95 kB
oss-stable-semver/react-dom/cjs/react-dom-server.browser.development.js +0.34% 353.78 kB 354.99 kB +0.20% 64.81 kB 64.95 kB
oss-stable/react-dom/cjs/react-dom-server.browser.development.js +0.34% 353.84 kB 355.05 kB +0.20% 64.84 kB 64.97 kB
oss-stable-rc/react-dom/cjs/react-dom-server.edge.development.js +0.34% 354.32 kB 355.54 kB +0.20% 64.92 kB 65.05 kB
oss-stable-semver/react-dom/cjs/react-dom-server.edge.development.js +0.34% 354.32 kB 355.54 kB +0.20% 64.92 kB 65.05 kB
oss-stable/react-dom/cjs/react-dom-server.edge.development.js +0.34% 354.39 kB 355.60 kB +0.20% 64.94 kB 65.07 kB
oss-experimental/react-dom/cjs/react-dom-server.node.development.js +0.34% 385.06 kB 386.38 kB +0.31% 68.29 kB 68.50 kB
oss-experimental/react-dom/cjs/react-dom-server.browser.development.js +0.34% 389.60 kB 390.91 kB +0.31% 68.77 kB 68.98 kB
oss-experimental/react-dom/cjs/react-dom-server.edge.development.js +0.34% 390.14 kB 391.46 kB +0.30% 68.87 kB 69.08 kB
oss-experimental/react-html/cjs/react-html.development.js +0.33% 338.71 kB 339.85 kB +0.29% 61.91 kB 62.08 kB
facebook-www/ReactDOMServerStreaming-dev.modern.js +0.33% 344.13 kB 345.27 kB +0.18% 63.09 kB 63.20 kB
oss-experimental/react-html/cjs/react-html.react-server.production.js +0.28% 296.67 kB 297.52 kB +0.08% 56.32 kB 56.36 kB
oss-experimental/react-html/cjs/react-html.react-server.development.js +0.23% 491.54 kB 492.68 kB +0.21% 88.60 kB 88.79 kB

Generated by 🚫 dangerJS against 762d139

@gnoff gnoff force-pushed the fizz-prerender-fallbacks-first branch from 280cbe4 to bb110b1 Compare July 26, 2024 16:53
When prerendering it can be convenient to abort the prerender while rendering. However if any Suspense fallbacks have not yet rendered before the abort happens the fallback itself will error and cause the nearest parent Suspense boundary to render a fallback instead. Prerenders are by definition not time critical so the prioritization of children over fallbacks which makes sense for render isn't similarly motivated for prerender. Given this, this change updates fallback rendering during a prerender to attempt the fallback before attempting children.
@gnoff gnoff force-pushed the fizz-prerender-fallbacks-first branch from 2a0e690 to 762d139 Compare July 26, 2024 20:58
@gnoff gnoff merged commit d17e9d1 into facebook:main Jul 26, 2024
187 checks passed
@gnoff gnoff deleted the fizz-prerender-fallbacks-first branch July 26, 2024 21:06
github-actions bot pushed a commit that referenced this pull request Jul 26, 2024
When prerendering it can be convenient to abort the prerender while
rendering. However if any Suspense fallbacks have not yet rendered
before the abort happens the fallback itself will error and cause the
nearest parent Suspense boundary to render a fallback instead.
Prerenders are by definition not time critical so the prioritization of
children over fallbacks which makes sense for render isn't similarly
motivated for prerender. Given this, this change updates fallback
rendering during a prerender to attempt the fallback before attempting
children.

DiffTrain build for [d17e9d1](d17e9d1)
github-actions bot pushed a commit to surenpoghosian/react that referenced this pull request Jul 28, 2024
When prerendering it can be convenient to abort the prerender while
rendering. However if any Suspense fallbacks have not yet rendered
before the abort happens the fallback itself will error and cause the
nearest parent Suspense boundary to render a fallback instead.
Prerenders are by definition not time critical so the prioritization of
children over fallbacks which makes sense for render isn't similarly
motivated for prerender. Given this, this change updates fallback
rendering during a prerender to attempt the fallback before attempting
children.

DiffTrain build for commit facebook@d17e9d1.
github-actions bot pushed a commit to surenpoghosian/react that referenced this pull request Jul 28, 2024
When prerendering it can be convenient to abort the prerender while
rendering. However if any Suspense fallbacks have not yet rendered
before the abort happens the fallback itself will error and cause the
nearest parent Suspense boundary to render a fallback instead.
Prerenders are by definition not time critical so the prioritization of
children over fallbacks which makes sense for render isn't similarly
motivated for prerender. Given this, this change updates fallback
rendering during a prerender to attempt the fallback before attempting
children.

DiffTrain build for [d17e9d1](facebook@d17e9d1)
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