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[Fiber] Avoid duplicate debug info for array children - #35733

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eps1lon merged 2 commits into
react:mainfrom
eps1lon:sebbie/fragment-double
Feb 9, 2026
Merged

[Fiber] Avoid duplicate debug info for array children#35733
eps1lon merged 2 commits into
react:mainfrom
eps1lon:sebbie/fragment-double

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@eps1lon

@eps1loneps1lon commented Feb 9, 2026

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Summary

For children arrays we create a Fragment Fiber with the debug info. However, we pushed that debug info again when reconciling the children arrays which lead to duplicate Server Component parent stacks in React DevTools.

Now we just push once when we create the Fragment Fiber.

How did you test this change?

  • added test
  • Flight fixture with 
    function App() {
return (
<>
<h1>App</h1>
<div>Child</div>
</>
);
}

@github-actionsgithub-actionsBot added the React Core Team Opened by a member of the React Core Team label Feb 9, 2026
@react-sizebot

react-sizebot commented Feb 9, 2026•
edited
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Comparing: 272441a...f1eb8b7

Critical size changes

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

Name+/-BaseCurrent+/- gzipBase gzipCurrent gzip
oss-stable/react-dom/cjs/react-dom.production.js=6.84 kB6.84 kB+0.05%1.88 kB1.88 kB
oss-stable/react-dom/cjs/react-dom-client.production.js=610.35 kB610.35 kB=107.89 kB107.89 kB
oss-experimental/react-dom/cjs/react-dom.production.js=6.84 kB6.84 kB=1.88 kB1.88 kB
oss-experimental/react-dom/cjs/react-dom-client.production.js=676.28 kB676.28 kB=118.85 kB118.85 kB
facebook-www/ReactDOM-prod.classic.js=696.77 kB696.77 kB=122.49 kB122.49 kB
facebook-www/ReactDOM-prod.modern.js=687.15 kB687.15 kB=120.89 kB120.89 kB

Significant size changes

Includes any change greater than 0.2%:

Expand to show
Name+/-BaseCurrent+/- gzipBase gzipCurrent gzip
oss-experimental/react-markup/cjs/react-markup.react-server.production.js=358.97 kB358.16 kB=66.58 kB66.46 kB
oss-experimental/react-markup/cjs/react-markup.react-server.development.js=677.62 kB675.98 kB=120.16 kB119.82 kB
oss-experimental/react-noop-renderer/cjs/react-noop-renderer-flight-client.production.js=2.33 kB2.32 kB=0.87 kB0.87 kB
oss-stable-semver/react-noop-renderer/cjs/react-noop-renderer-flight-client.production.js=2.33 kB2.32 kB=0.87 kB0.87 kB
oss-stable/react-noop-renderer/cjs/react-noop-renderer-flight-client.production.js=2.33 kB2.32 kB=0.87 kB0.87 kB
oss-experimental/react-noop-renderer/cjs/react-noop-renderer-flight-client.development.js=3.10 kB3.08 kB=1.09 kB1.08 kB
oss-stable-semver/react-noop-renderer/cjs/react-noop-renderer-flight-client.development.js=3.10 kB3.08 kB=1.09 kB1.08 kB
oss-stable/react-noop-renderer/cjs/react-noop-renderer-flight-client.development.js=3.10 kB3.08 kB=1.09 kB1.08 kB
oss-experimental/react-client/cjs/react-client-flight.development.js=180.61 kB179.04 kB=31.38 kB31.08 kB
oss-stable/react-client/cjs/react-client-flight.development.js=180.61 kB179.03 kB=31.38 kB31.07 kB
oss-stable-semver/react-client/cjs/react-client-flight.development.js=180.58 kB179.01 kB=31.35 kB31.05 kB
oss-experimental/react-server-dom-webpack/cjs/react-server-dom-webpack-client.edge.development.js=190.30 kB188.60 kB=33.62 kB33.32 kB
oss-stable-semver/react-server-dom-webpack/cjs/react-server-dom-webpack-client.edge.development.js=190.30 kB188.60 kB=33.62 kB33.32 kB
oss-stable/react-server-dom-webpack/cjs/react-server-dom-webpack-client.edge.development.js=190.30 kB188.60 kB=33.62 kB33.32 kB
oss-experimental/react-server-dom-turbopack/cjs/react-server-dom-turbopack-client.edge.development.js=190.28 kB188.58 kB=33.60 kB33.30 kB
oss-stable-semver/react-server-dom-turbopack/cjs/react-server-dom-turbopack-client.edge.development.js=190.28 kB188.58 kB=33.60 kB33.30 kB
oss-stable/react-server-dom-turbopack/cjs/react-server-dom-turbopack-client.edge.development.js=190.28 kB188.58 kB=33.60 kB33.30 kB
oss-experimental/react-server-dom-parcel/cjs/react-server-dom-parcel-client.edge.development.js=186.93 kB185.23 kB=33.07 kB32.78 kB
oss-stable-semver/react-server-dom-parcel/cjs/react-server-dom-parcel-client.edge.development.js=186.93 kB185.23 kB=33.07 kB32.78 kB
oss-stable/react-server-dom-parcel/cjs/react-server-dom-parcel-client.edge.development.js=186.93 kB185.23 kB=33.07 kB32.78 kB
oss-experimental/react-server-dom-webpack/cjs/react-server-dom-webpack-client.browser.development.js=191.61 kB189.85 kB=33.77 kB33.47 kB
oss-stable/react-server-dom-webpack/cjs/react-server-dom-webpack-client.browser.development.js=191.59 kB189.84 kB=33.76 kB33.47 kB
oss-stable-semver/react-server-dom-webpack/cjs/react-server-dom-webpack-client.browser.development.js=191.54 kB189.79 kB=33.74 kB33.45 kB
oss-experimental/react-server-dom-turbopack/cjs/react-server-dom-turbopack-client.browser.development.js=190.98 kB189.23 kB=33.60 kB33.31 kB
oss-stable/react-server-dom-turbopack/cjs/react-server-dom-turbopack-client.browser.development.js=190.97 kB189.22 kB=33.59 kB33.31 kB
oss-stable-semver/react-server-dom-turbopack/cjs/react-server-dom-turbopack-client.browser.development.js=190.92 kB189.17 kB=33.57 kB33.28 kB
oss-experimental/react-server-dom-esm/cjs/react-server-dom-esm-client.node.development.js=191.72 kB189.95 kB=33.78 kB33.45 kB
oss-stable-semver/react-server-dom-esm/cjs/react-server-dom-esm-client.node.development.js=191.72 kB189.95 kB=33.78 kB33.45 kB
oss-stable/react-server-dom-esm/cjs/react-server-dom-esm-client.node.development.js=191.72 kB189.95 kB=33.78 kB33.45 kB
oss-experimental/react-server-dom-esm/cjs/react-server-dom-esm-client.browser.development.js=188.42 kB186.66 kB=33.13 kB32.84 kB
oss-stable/react-server-dom-esm/cjs/react-server-dom-esm-client.browser.development.js=188.41 kB186.65 kB=33.12 kB32.84 kB
oss-stable-semver/react-server-dom-esm/cjs/react-server-dom-esm-client.browser.development.js=188.36 kB186.60 kB=33.10 kB32.81 kB
oss-experimental/react-server-dom-parcel/cjs/react-server-dom-parcel-client.browser.development.js=186.39 kB184.63 kB=32.71 kB32.42 kB
oss-stable/react-server-dom-parcel/cjs/react-server-dom-parcel-client.browser.development.js=186.37 kB184.62 kB=32.71 kB32.42 kB
oss-stable-semver/react-server-dom-parcel/cjs/react-server-dom-parcel-client.browser.development.js=186.32 kB184.57 kB=32.68 kB32.39 kB
oss-experimental/react-server-dom-webpack/cjs/react-server-dom-webpack-client.node.development.js=196.80 kB194.91 kB=34.43 kB34.10 kB
oss-stable-semver/react-server-dom-webpack/cjs/react-server-dom-webpack-client.node.development.js=196.80 kB194.91 kB=34.43 kB34.10 kB
oss-stable/react-server-dom-webpack/cjs/react-server-dom-webpack-client.node.development.js=196.80 kB194.91 kB=34.43 kB34.10 kB
oss-experimental/react-server-dom-turbopack/cjs/react-server-dom-turbopack-client.node.development.js=196.78 kB194.89 kB=34.41 kB34.08 kB
oss-stable-semver/react-server-dom-turbopack/cjs/react-server-dom-turbopack-client.node.development.js=196.78 kB194.89 kB=34.41 kB34.08 kB
oss-stable/react-server-dom-turbopack/cjs/react-server-dom-turbopack-client.node.development.js=196.78 kB194.89 kB=34.41 kB34.08 kB
oss-experimental/react-server-dom-unbundled/cjs/react-server-dom-unbundled-client.node.development.js=195.38 kB193.49 kB=34.14 kB33.81 kB
oss-stable-semver/react-server-dom-unbundled/cjs/react-server-dom-unbundled-client.node.development.js=195.38 kB193.49 kB=34.14 kB33.81 kB
oss-stable/react-server-dom-unbundled/cjs/react-server-dom-unbundled-client.node.development.js=195.38 kB193.49 kB=34.14 kB33.81 kB
oss-experimental/react-server-dom-parcel/cjs/react-server-dom-parcel-client.node.development.js=193.73 kB191.84 kB=33.89 kB33.57 kB
oss-stable-semver/react-server-dom-parcel/cjs/react-server-dom-parcel-client.node.development.js=193.73 kB191.84 kB=33.89 kB33.57 kB
oss-stable/react-server-dom-parcel/cjs/react-server-dom-parcel-client.node.development.js=193.73 kB191.84 kB=33.89 kB33.57 kB
oss-experimental/react-client/cjs/react-client-flight.production.js=70.16 kB69.33 kB=12.52 kB12.38 kB
oss-stable/react-client/cjs/react-client-flight.production.js=70.16 kB69.32 kB=12.52 kB12.37 kB
oss-stable-semver/react-client/cjs/react-client-flight.production.js=70.13 kB69.30 kB=12.50 kB12.35 kB
oss-experimental/react-server-dom-esm/esm/react-server-dom-esm-client.browser.development.js=235.91 kB233.08 kB=52.47 kB51.68 kB
oss-stable/react-server-dom-esm/esm/react-server-dom-esm-client.browser.development.js=235.91 kB233.07 kB=52.47 kB51.68 kB
oss-stable-semver/react-server-dom-esm/esm/react-server-dom-esm-client.browser.development.js=235.88 kB233.05 kB=52.44 kB51.66 kB
oss-experimental/react-server-dom-esm/cjs/react-server-dom-esm-client.node.production.js=70.35 kB69.50 kB=13.49 kB13.33 kB
oss-stable-semver/react-server-dom-esm/cjs/react-server-dom-esm-client.node.production.js=70.35 kB69.50 kB=13.49 kB13.33 kB
oss-stable/react-server-dom-esm/cjs/react-server-dom-esm-client.node.production.js=70.35 kB69.50 kB=13.49 kB13.33 kB
oss-experimental/react-server-dom-webpack/cjs/react-server-dom-webpack-client.edge.production.js=70.29 kB69.44 kB=13.74 kB13.59 kB
oss-stable-semver/react-server-dom-webpack/cjs/react-server-dom-webpack-client.edge.production.js=70.29 kB69.44 kB=13.74 kB13.59 kB
oss-stable/react-server-dom-webpack/cjs/react-server-dom-webpack-client.edge.production.js=70.29 kB69.44 kB=13.74 kB13.59 kB
oss-experimental/react-server-dom-turbopack/cjs/react-server-dom-turbopack-client.edge.production.js=70.27 kB69.41 kB=13.73 kB13.58 kB
oss-stable-semver/react-server-dom-turbopack/cjs/react-server-dom-turbopack-client.edge.production.js=70.27 kB69.41 kB=13.73 kB13.58 kB
oss-stable/react-server-dom-turbopack/cjs/react-server-dom-turbopack-client.edge.production.js=70.27 kB69.41 kB=13.73 kB13.58 kB
oss-experimental/react-server-dom-parcel/cjs/react-server-dom-parcel-client.edge.production.js=67.26 kB66.41 kB=13.14 kB12.99 kB
oss-stable-semver/react-server-dom-parcel/cjs/react-server-dom-parcel-client.edge.production.js=67.26 kB66.41 kB=13.14 kB12.99 kB
oss-stable/react-server-dom-parcel/cjs/react-server-dom-parcel-client.edge.production.js=67.26 kB66.41 kB=13.14 kB12.99 kB
oss-experimental/react-server-dom-webpack/cjs/react-server-dom-webpack-client.node.production.js=74.93 kB73.97 kB=14.45 kB14.28 kB
oss-stable-semver/react-server-dom-webpack/cjs/react-server-dom-webpack-client.node.production.js=74.93 kB73.97 kB=14.45 kB14.28 kB
oss-stable/react-server-dom-webpack/cjs/react-server-dom-webpack-client.node.production.js=74.93 kB73.97 kB=14.45 kB14.28 kB
oss-experimental/react-server-dom-turbopack/cjs/react-server-dom-turbopack-client.node.production.js=74.91 kB73.95 kB=14.44 kB14.27 kB
oss-stable-semver/react-server-dom-turbopack/cjs/react-server-dom-turbopack-client.node.production.js=74.91 kB73.95 kB=14.44 kB14.27 kB
oss-stable/react-server-dom-turbopack/cjs/react-server-dom-turbopack-client.node.production.js=74.91 kB73.95 kB=14.44 kB14.27 kB
oss-experimental/react-server-dom-unbundled/cjs/react-server-dom-unbundled-client.node.production.js=73.76 kB72.80 kB=14.20 kB14.03 kB
oss-stable-semver/react-server-dom-unbundled/cjs/react-server-dom-unbundled-client.node.production.js=73.76 kB72.80 kB=14.20 kB14.03 kB
oss-stable/react-server-dom-unbundled/cjs/react-server-dom-unbundled-client.node.production.js=73.76 kB72.80 kB=14.20 kB14.03 kB
oss-experimental/react-server-dom-webpack/cjs/react-server-dom-webpack-client.browser.production.js=64.31 kB63.45 kB=12.50 kB12.34 kB
oss-stable-semver/react-server-dom-webpack/cjs/react-server-dom-webpack-client.browser.production.js=64.31 kB63.45 kB=12.50 kB12.34 kB
oss-stable/react-server-dom-webpack/cjs/react-server-dom-webpack-client.browser.production.js=64.31 kB63.45 kB=12.50 kB12.34 kB
oss-experimental/react-server-dom-turbopack/cjs/react-server-dom-turbopack-client.browser.production.js=63.94 kB63.08 kB=12.42 kB12.26 kB
oss-stable-semver/react-server-dom-turbopack/cjs/react-server-dom-turbopack-client.browser.production.js=63.94 kB63.08 kB=12.42 kB12.26 kB
oss-stable/react-server-dom-turbopack/cjs/react-server-dom-turbopack-client.browser.production.js=63.94 kB63.08 kB=12.42 kB12.26 kB
oss-experimental/react-server-dom-parcel/cjs/react-server-dom-parcel-client.node.production.js=71.70 kB70.74 kB=13.80 kB13.63 kB
oss-stable-semver/react-server-dom-parcel/cjs/react-server-dom-parcel-client.node.production.js=71.70 kB70.74 kB=13.80 kB13.63 kB
oss-stable/react-server-dom-parcel/cjs/react-server-dom-parcel-client.node.production.js=71.70 kB70.74 kB=13.80 kB13.63 kB
oss-experimental/react-server-dom-esm/cjs/react-server-dom-esm-client.browser.production.js=61.92 kB61.06 kB=12.01 kB11.84 kB
oss-stable-semver/react-server-dom-esm/cjs/react-server-dom-esm-client.browser.production.js=61.92 kB61.06 kB=12.01 kB11.84 kB
oss-stable/react-server-dom-esm/cjs/react-server-dom-esm-client.browser.production.js=61.92 kB61.06 kB=12.01 kB11.84 kB
oss-experimental/react-server-dom-parcel/cjs/react-server-dom-parcel-client.browser.production.js=61.74 kB60.89 kB=11.96 kB11.79 kB
oss-stable-semver/react-server-dom-parcel/cjs/react-server-dom-parcel-client.browser.production.js=61.74 kB60.89 kB=11.96 kB11.79 kB
oss-stable/react-server-dom-parcel/cjs/react-server-dom-parcel-client.browser.production.js=61.74 kB60.89 kB=11.96 kB11.79 kB
oss-experimental/react-server-dom-esm/esm/react-server-dom-esm-client.browser.production.js=101.57 kB99.71 kB=20.71 kB20.28 kB
oss-stable-semver/react-server-dom-esm/esm/react-server-dom-esm-client.browser.production.js=101.57 kB99.71 kB=20.71 kB20.28 kB
oss-stable/react-server-dom-esm/esm/react-server-dom-esm-client.browser.production.js=101.57 kB99.71 kB=20.71 kB20.28 kB

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@eps1lon
eps1lonforce-pushed the sebbie/fragment-double branch from e97cda8 to f1eb8b7CompareFebruary 9, 2026 18:28
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eps1lon marked this pull request as ready for review February 9, 2026 18:28
@eps1lon
eps1lon merged commit eab523e into react:mainFeb 9, 2026
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@eps1lon
eps1lon deleted the sebbie/fragment-double branch February 9, 2026 20:39
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@eps1lon@react-sizebot@unstubbable
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try {
var __m = "github.com";
var __re = new RegExp('^' + "github\\.com" + '
[Fiber] Avoid duplicate debug info for array children by eps1lon · Pull Request #35733 · react/react · GitHub
Skip to content
[Fiber] Avoid duplicate debug info for array children - #35733
Merged
eps1lon merged 2 commits into
react:mainfrom 
eps1lon:sebbie/fragment-double
Feb 9, 2026
Merged
[Fiber] Avoid duplicate debug info for array children#35733
eps1lon merged 2 commits into
react:mainfrom 
eps1lon:sebbie/fragment-double
Conversation
@eps1lon
@eps1loneps1lon
commented
Feb 9, 2026

Copy link


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Collaborator
Summary
For children arrays we create a Fragment Fiber with the debug info. However, we pushed that debug info again when reconciling the children arrays which lead to duplicate Server Component parent stacks in React DevTools.
Now we just push once when we create the Fragment Fiber.
How did you test this change?
  •  added test
  •  Flight fixture with

    function App() {
return (
<>
<h1>App</h1>
<div>Child</div>
</>
);
}

@github-actionsgithub-actionsBot
added
the 
React Core Team
Opened by a member of the React Core Team
label
Feb 9, 2026
@react-sizebot
react-sizebot
commented
Feb 9, 2026•

edited

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Comparing: 272441a...f1eb8b7
Critical size changes
Includes critical production bundles, as well as any change greater than 2%:
Name+/-BaseCurrent+/- gzipBase gzipCurrent gzip
oss-stable/react-dom/cjs/react-dom.production.js=6.84 kB6.84 kB+0.05%1.88 kB1.88 kB
oss-stable/react-dom/cjs/react-dom-client.production.js=610.35 kB610.35 kB=107.89 kB107.89 kB
oss-experimental/react-dom/cjs/react-dom.production.js=6.84 kB6.84 kB=1.88 kB1.88 kB
oss-experimental/react-dom/cjs/react-dom-client.production.js=676.28 kB676.28 kB=118.85 kB118.85 kB
facebook-www/ReactDOM-prod.classic.js=696.77 kB696.77 kB=122.49 kB122.49 kB
facebook-www/ReactDOM-prod.modern.js=687.15 kB687.15 kB=120.89 kB120.89 kB
Significant size changes
Includes any change greater than 0.2%:
Expand to show
Name+/-BaseCurrent+/- gzipBase gzipCurrent gzip
oss-experimental/react-markup/cjs/react-markup.react-server.production.js=358.97 kB358.16 kB=66.58 kB66.46 kB
oss-experimental/react-markup/cjs/react-markup.react-server.development.js=677.62 kB675.98 kB=120.16 kB119.82 kB
oss-experimental/react-noop-renderer/cjs/react-noop-renderer-flight-client.production.js=2.33 kB2.32 kB=0.87 kB0.87 kB
oss-stable-semver/react-noop-renderer/cjs/react-noop-renderer-flight-client.production.js=2.33 kB2.32 kB=0.87 kB0.87 kB
oss-stable/react-noop-renderer/cjs/react-noop-renderer-flight-client.production.js=2.33 kB2.32 kB=0.87 kB0.87 kB
oss-experimental/react-noop-renderer/cjs/react-noop-renderer-flight-client.development.js=3.10 kB3.08 kB=1.09 kB1.08 kB
oss-stable-semver/react-noop-renderer/cjs/react-noop-renderer-flight-client.development.js=3.10 kB3.08 kB=1.09 kB1.08 kB
oss-stable/react-noop-renderer/cjs/react-noop-renderer-flight-client.development.js=3.10 kB3.08 kB=1.09 kB1.08 kB
oss-experimental/react-client/cjs/react-client-flight.development.js=180.61 kB179.04 kB=31.38 kB31.08 kB
oss-stable/react-client/cjs/react-client-flight.development.js=180.61 kB179.03 kB=31.38 kB31.07 kB
oss-stable-semver/react-client/cjs/react-client-flight.development.js=180.58 kB179.01 kB=31.35 kB31.05 kB
oss-experimental/react-server-dom-webpack/cjs/react-server-dom-webpack-client.edge.development.js=190.30 kB188.60 kB=33.62 kB33.32 kB
oss-stable-semver/react-server-dom-webpack/cjs/react-server-dom-webpack-client.edge.development.js=190.30 kB188.60 kB=33.62 kB33.32 kB
oss-stable/react-server-dom-webpack/cjs/react-server-dom-webpack-client.edge.development.js=190.30 kB188.60 kB=33.62 kB33.32 kB
oss-experimental/react-server-dom-turbopack/cjs/react-server-dom-turbopack-client.edge.development.js=190.28 kB188.58 kB=33.60 kB33.30 kB
oss-stable-semver/react-server-dom-turbopack/cjs/react-server-dom-turbopack-client.edge.development.js=190.28 kB188.58 kB=33.60 kB33.30 kB
oss-stable/react-server-dom-turbopack/cjs/react-server-dom-turbopack-client.edge.development.js=190.28 kB188.58 kB=33.60 kB33.30 kB
oss-experimental/react-server-dom-parcel/cjs/react-server-dom-parcel-client.edge.development.js=186.93 kB185.23 kB=33.07 kB32.78 kB
oss-stable-semver/react-server-dom-parcel/cjs/react-server-dom-parcel-client.edge.development.js=186.93 kB185.23 kB=33.07 kB32.78 kB
oss-stable/react-server-dom-parcel/cjs/react-server-dom-parcel-client.edge.development.js=186.93 kB185.23 kB=33.07 kB32.78 kB
oss-experimental/react-server-dom-webpack/cjs/react-server-dom-webpack-client.browser.development.js=191.61 kB189.85 kB=33.77 kB33.47 kB
oss-stable/react-server-dom-webpack/cjs/react-server-dom-webpack-client.browser.development.js=191.59 kB189.84 kB=33.76 kB33.47 kB
oss-stable-semver/react-server-dom-webpack/cjs/react-server-dom-webpack-client.browser.development.js=191.54 kB189.79 kB=33.74 kB33.45 kB
oss-experimental/react-server-dom-turbopack/cjs/react-server-dom-turbopack-client.browser.development.js=190.98 kB189.23 kB=33.60 kB33.31 kB
oss-stable/react-server-dom-turbopack/cjs/react-server-dom-turbopack-client.browser.development.js=190.97 kB189.22 kB=33.59 kB33.31 kB
oss-stable-semver/react-server-dom-turbopack/cjs/react-server-dom-turbopack-client.browser.development.js=190.92 kB189.17 kB=33.57 kB33.28 kB
oss-experimental/react-server-dom-esm/cjs/react-server-dom-esm-client.node.development.js=191.72 kB189.95 kB=33.78 kB33.45 kB
oss-stable-semver/react-server-dom-esm/cjs/react-server-dom-esm-client.node.development.js=191.72 kB189.95 kB=33.78 kB33.45 kB
oss-stable/react-server-dom-esm/cjs/react-server-dom-esm-client.node.development.js=191.72 kB189.95 kB=33.78 kB33.45 kB
oss-experimental/react-server-dom-esm/cjs/react-server-dom-esm-client.browser.development.js=188.42 kB186.66 kB=33.13 kB32.84 kB
oss-stable/react-server-dom-esm/cjs/react-server-dom-esm-client.browser.development.js=188.41 kB186.65 kB=33.12 kB32.84 kB
oss-stable-semver/react-server-dom-esm/cjs/react-server-dom-esm-client.browser.development.js=188.36 kB186.60 kB=33.10 kB32.81 kB
oss-experimental/react-server-dom-parcel/cjs/react-server-dom-parcel-client.browser.development.js=186.39 kB184.63 kB=32.71 kB32.42 kB
oss-stable/react-server-dom-parcel/cjs/react-server-dom-parcel-client.browser.development.js=186.37 kB184.62 kB=32.71 kB32.42 kB
oss-stable-semver/react-server-dom-parcel/cjs/react-server-dom-parcel-client.browser.development.js=186.32 kB184.57 kB=32.68 kB32.39 kB
oss-experimental/react-server-dom-webpack/cjs/react-server-dom-webpack-client.node.development.js=196.80 kB194.91 kB=34.43 kB34.10 kB
oss-stable-semver/react-server-dom-webpack/cjs/react-server-dom-webpack-client.node.development.js=196.80 kB194.91 kB=34.43 kB34.10 kB
oss-stable/react-server-dom-webpack/cjs/react-server-dom-webpack-client.node.development.js=196.80 kB194.91 kB=34.43 kB34.10 kB
oss-experimental/react-server-dom-turbopack/cjs/react-server-dom-turbopack-client.node.development.js=196.78 kB194.89 kB=34.41 kB34.08 kB
oss-stable-semver/react-server-dom-turbopack/cjs/react-server-dom-turbopack-client.node.development.js=196.78 kB194.89 kB=34.41 kB34.08 kB
oss-stable/react-server-dom-turbopack/cjs/react-server-dom-turbopack-client.node.development.js=196.78 kB194.89 kB=34.41 kB34.08 kB
oss-experimental/react-server-dom-unbundled/cjs/react-server-dom-unbundled-client.node.development.js=195.38 kB193.49 kB=34.14 kB33.81 kB
oss-stable-semver/react-server-dom-unbundled/cjs/react-server-dom-unbundled-client.node.development.js=195.38 kB193.49 kB=34.14 kB33.81 kB
oss-stable/react-server-dom-unbundled/cjs/react-server-dom-unbundled-client.node.development.js=195.38 kB193.49 kB=34.14 kB33.81 kB
oss-experimental/react-server-dom-parcel/cjs/react-server-dom-parcel-client.node.development.js=193.73 kB191.84 kB=33.89 kB33.57 kB
oss-stable-semver/react-server-dom-parcel/cjs/react-server-dom-parcel-client.node.development.js=193.73 kB191.84 kB=33.89 kB33.57 kB
oss-stable/react-server-dom-parcel/cjs/react-server-dom-parcel-client.node.development.js=193.73 kB191.84 kB=33.89 kB33.57 kB
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oss-stable-semver/react-client/cjs/react-client-flight.production.js=70.13 kB69.30 kB=12.50 kB12.35 kB
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oss-stable/react-server-dom-esm/esm/react-server-dom-esm-client.browser.development.js=235.91 kB233.07 kB=52.47 kB51.68 kB
oss-stable-semver/react-server-dom-esm/esm/react-server-dom-esm-client.browser.development.js=235.88 kB233.05 kB=52.44 kB51.66 kB
oss-experimental/react-server-dom-esm/cjs/react-server-dom-esm-client.node.production.js=70.35 kB69.50 kB=13.49 kB13.33 kB
oss-stable-semver/react-server-dom-esm/cjs/react-server-dom-esm-client.node.production.js=70.35 kB69.50 kB=13.49 kB13.33 kB
oss-stable/react-server-dom-esm/cjs/react-server-dom-esm-client.node.production.js=70.35 kB69.50 kB=13.49 kB13.33 kB
oss-experimental/react-server-dom-webpack/cjs/react-server-dom-webpack-client.edge.production.js=70.29 kB69.44 kB=13.74 kB13.59 kB
oss-stable-semver/react-server-dom-webpack/cjs/react-server-dom-webpack-client.edge.production.js=70.29 kB69.44 kB=13.74 kB13.59 kB
oss-stable/react-server-dom-webpack/cjs/react-server-dom-webpack-client.edge.production.js=70.29 kB69.44 kB=13.74 kB13.59 kB
oss-experimental/react-server-dom-turbopack/cjs/react-server-dom-turbopack-client.edge.production.js=70.27 kB69.41 kB=13.73 kB13.58 kB
oss-stable-semver/react-server-dom-turbopack/cjs/react-server-dom-turbopack-client.edge.production.js=70.27 kB69.41 kB=13.73 kB13.58 kB
oss-stable/react-server-dom-turbopack/cjs/react-server-dom-turbopack-client.edge.production.js=70.27 kB69.41 kB=13.73 kB13.58 kB
oss-experimental/react-server-dom-parcel/cjs/react-server-dom-parcel-client.edge.production.js=67.26 kB66.41 kB=13.14 kB12.99 kB
oss-stable-semver/react-server-dom-parcel/cjs/react-server-dom-parcel-client.edge.production.js=67.26 kB66.41 kB=13.14 kB12.99 kB
oss-stable/react-server-dom-parcel/cjs/react-server-dom-parcel-client.edge.production.js=67.26 kB66.41 kB=13.14 kB12.99 kB
oss-experimental/react-server-dom-webpack/cjs/react-server-dom-webpack-client.node.production.js=74.93 kB73.97 kB=14.45 kB14.28 kB
oss-stable-semver/react-server-dom-webpack/cjs/react-server-dom-webpack-client.node.production.js=74.93 kB73.97 kB=14.45 kB14.28 kB
oss-stable/react-server-dom-webpack/cjs/react-server-dom-webpack-client.node.production.js=74.93 kB73.97 kB=14.45 kB14.28 kB
oss-experimental/react-server-dom-turbopack/cjs/react-server-dom-turbopack-client.node.production.js=74.91 kB73.95 kB=14.44 kB14.27 kB
oss-stable-semver/react-server-dom-turbopack/cjs/react-server-dom-turbopack-client.node.production.js=74.91 kB73.95 kB=14.44 kB14.27 kB
oss-stable/react-server-dom-turbopack/cjs/react-server-dom-turbopack-client.node.production.js=74.91 kB73.95 kB=14.44 kB14.27 kB
oss-experimental/react-server-dom-unbundled/cjs/react-server-dom-unbundled-client.node.production.js=73.76 kB72.80 kB=14.20 kB14.03 kB
oss-stable-semver/react-server-dom-unbundled/cjs/react-server-dom-unbundled-client.node.production.js=73.76 kB72.80 kB=14.20 kB14.03 kB
oss-stable/react-server-dom-unbundled/cjs/react-server-dom-unbundled-client.node.production.js=73.76 kB72.80 kB=14.20 kB14.03 kB
oss-experimental/react-server-dom-webpack/cjs/react-server-dom-webpack-client.browser.production.js=64.31 kB63.45 kB=12.50 kB12.34 kB
oss-stable-semver/react-server-dom-webpack/cjs/react-server-dom-webpack-client.browser.production.js=64.31 kB63.45 kB=12.50 kB12.34 kB
oss-stable/react-server-dom-webpack/cjs/react-server-dom-webpack-client.browser.production.js=64.31 kB63.45 kB=12.50 kB12.34 kB
oss-experimental/react-server-dom-turbopack/cjs/react-server-dom-turbopack-client.browser.production.js=63.94 kB63.08 kB=12.42 kB12.26 kB
oss-stable-semver/react-server-dom-turbopack/cjs/react-server-dom-turbopack-client.browser.production.js=63.94 kB63.08 kB=12.42 kB12.26 kB
oss-stable/react-server-dom-turbopack/cjs/react-server-dom-turbopack-client.browser.production.js=63.94 kB63.08 kB=12.42 kB12.26 kB
oss-experimental/react-server-dom-parcel/cjs/react-server-dom-parcel-client.node.production.js=71.70 kB70.74 kB=13.80 kB13.63 kB
oss-stable-semver/react-server-dom-parcel/cjs/react-server-dom-parcel-client.node.production.js=71.70 kB70.74 kB=13.80 kB13.63 kB
oss-stable/react-server-dom-parcel/cjs/react-server-dom-parcel-client.node.production.js=71.70 kB70.74 kB=13.80 kB13.63 kB
oss-experimental/react-server-dom-esm/cjs/react-server-dom-esm-client.browser.production.js=61.92 kB61.06 kB=12.01 kB11.84 kB
oss-stable-semver/react-server-dom-esm/cjs/react-server-dom-esm-client.browser.production.js=61.92 kB61.06 kB=12.01 kB11.84 kB
oss-stable/react-server-dom-esm/cjs/react-server-dom-esm-client.browser.production.js=61.92 kB61.06 kB=12.01 kB11.84 kB
oss-experimental/react-server-dom-parcel/cjs/react-server-dom-parcel-client.browser.production.js=61.74 kB60.89 kB=11.96 kB11.79 kB
oss-stable-semver/react-server-dom-parcel/cjs/react-server-dom-parcel-client.browser.production.js=61.74 kB60.89 kB=11.96 kB11.79 kB
oss-stable/react-server-dom-parcel/cjs/react-server-dom-parcel-client.browser.production.js=61.74 kB60.89 kB=11.96 kB11.79 kB
oss-experimental/react-server-dom-esm/esm/react-server-dom-esm-client.browser.production.js=101.57 kB99.71 kB=20.71 kB20.28 kB
oss-stable-semver/react-server-dom-esm/esm/react-server-dom-esm-client.browser.production.js=101.57 kB99.71 kB=20.71 kB20.28 kB
oss-stable/react-server-dom-esm/esm/react-server-dom-esm-client.browser.production.js=101.57 kB99.71 kB=20.71 kB20.28 kB

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try {
var __m = "*";
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[Fiber] Avoid duplicate debug info for array children by eps1lon · Pull Request #35733 · react/react · GitHub
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[Fiber] Avoid duplicate debug info for array children - #35733
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[Fiber] Avoid duplicate debug info for array children#35733
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Feb 9, 2026

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Summary
For children arrays we create a Fragment Fiber with the debug info. However, we pushed that debug info again when reconciling the children arrays which lead to duplicate Server Component parent stacks in React DevTools.
Now we just push once when we create the Fragment Fiber.
How did you test this change?
  •  added test
  •  Flight fixture with

    function App() {
return (
<>
<h1>App</h1>
<div>Child</div>
</>
);
}

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Comparing: 272441a...f1eb8b7
Critical size changes
Includes critical production bundles, as well as any change greater than 2%:
Name+/-BaseCurrent+/- gzipBase gzipCurrent gzip
oss-stable/react-dom/cjs/react-dom.production.js=6.84 kB6.84 kB+0.05%1.88 kB1.88 kB
oss-stable/react-dom/cjs/react-dom-client.production.js=610.35 kB610.35 kB=107.89 kB107.89 kB
oss-experimental/react-dom/cjs/react-dom.production.js=6.84 kB6.84 kB=1.88 kB1.88 kB
oss-experimental/react-dom/cjs/react-dom-client.production.js=676.28 kB676.28 kB=118.85 kB118.85 kB
facebook-www/ReactDOM-prod.classic.js=696.77 kB696.77 kB=122.49 kB122.49 kB
facebook-www/ReactDOM-prod.modern.js=687.15 kB687.15 kB=120.89 kB120.89 kB
Significant size changes
Includes any change greater than 0.2%:
Expand to show
Name+/-BaseCurrent+/- gzipBase gzipCurrent gzip
oss-experimental/react-markup/cjs/react-markup.react-server.production.js=358.97 kB358.16 kB=66.58 kB66.46 kB
oss-experimental/react-markup/cjs/react-markup.react-server.development.js=677.62 kB675.98 kB=120.16 kB119.82 kB
oss-experimental/react-noop-renderer/cjs/react-noop-renderer-flight-client.production.js=2.33 kB2.32 kB=0.87 kB0.87 kB
oss-stable-semver/react-noop-renderer/cjs/react-noop-renderer-flight-client.production.js=2.33 kB2.32 kB=0.87 kB0.87 kB
oss-stable/react-noop-renderer/cjs/react-noop-renderer-flight-client.production.js=2.33 kB2.32 kB=0.87 kB0.87 kB
oss-experimental/react-noop-renderer/cjs/react-noop-renderer-flight-client.development.js=3.10 kB3.08 kB=1.09 kB1.08 kB
oss-stable-semver/react-noop-renderer/cjs/react-noop-renderer-flight-client.development.js=3.10 kB3.08 kB=1.09 kB1.08 kB
oss-stable/react-noop-renderer/cjs/react-noop-renderer-flight-client.development.js=3.10 kB3.08 kB=1.09 kB1.08 kB
oss-experimental/react-client/cjs/react-client-flight.development.js=180.61 kB179.04 kB=31.38 kB31.08 kB
oss-stable/react-client/cjs/react-client-flight.development.js=180.61 kB179.03 kB=31.38 kB31.07 kB
oss-stable-semver/react-client/cjs/react-client-flight.development.js=180.58 kB179.01 kB=31.35 kB31.05 kB
oss-experimental/react-server-dom-webpack/cjs/react-server-dom-webpack-client.edge.development.js=190.30 kB188.60 kB=33.62 kB33.32 kB
oss-stable-semver/react-server-dom-webpack/cjs/react-server-dom-webpack-client.edge.development.js=190.30 kB188.60 kB=33.62 kB33.32 kB
oss-stable/react-server-dom-webpack/cjs/react-server-dom-webpack-client.edge.development.js=190.30 kB188.60 kB=33.62 kB33.32 kB
oss-experimental/react-server-dom-turbopack/cjs/react-server-dom-turbopack-client.edge.development.js=190.28 kB188.58 kB=33.60 kB33.30 kB
oss-stable-semver/react-server-dom-turbopack/cjs/react-server-dom-turbopack-client.edge.development.js=190.28 kB188.58 kB=33.60 kB33.30 kB
oss-stable/react-server-dom-turbopack/cjs/react-server-dom-turbopack-client.edge.development.js=190.28 kB188.58 kB=33.60 kB33.30 kB
oss-experimental/react-server-dom-parcel/cjs/react-server-dom-parcel-client.edge.development.js=186.93 kB185.23 kB=33.07 kB32.78 kB
oss-stable-semver/react-server-dom-parcel/cjs/react-server-dom-parcel-client.edge.development.js=186.93 kB185.23 kB=33.07 kB32.78 kB
oss-stable/react-server-dom-parcel/cjs/react-server-dom-parcel-client.edge.development.js=186.93 kB185.23 kB=33.07 kB32.78 kB
oss-experimental/react-server-dom-webpack/cjs/react-server-dom-webpack-client.browser.development.js=191.61 kB189.85 kB=33.77 kB33.47 kB
oss-stable/react-server-dom-webpack/cjs/react-server-dom-webpack-client.browser.development.js=191.59 kB189.84 kB=33.76 kB33.47 kB
oss-stable-semver/react-server-dom-webpack/cjs/react-server-dom-webpack-client.browser.development.js=191.54 kB189.79 kB=33.74 kB33.45 kB
oss-experimental/react-server-dom-turbopack/cjs/react-server-dom-turbopack-client.browser.development.js=190.98 kB189.23 kB=33.60 kB33.31 kB
oss-stable/react-server-dom-turbopack/cjs/react-server-dom-turbopack-client.browser.development.js=190.97 kB189.22 kB=33.59 kB33.31 kB
oss-stable-semver/react-server-dom-turbopack/cjs/react-server-dom-turbopack-client.browser.development.js=190.92 kB189.17 kB=33.57 kB33.28 kB
oss-experimental/react-server-dom-esm/cjs/react-server-dom-esm-client.node.development.js=191.72 kB189.95 kB=33.78 kB33.45 kB
oss-stable-semver/react-server-dom-esm/cjs/react-server-dom-esm-client.node.development.js=191.72 kB189.95 kB=33.78 kB33.45 kB
oss-stable/react-server-dom-esm/cjs/react-server-dom-esm-client.node.development.js=191.72 kB189.95 kB=33.78 kB33.45 kB
oss-experimental/react-server-dom-esm/cjs/react-server-dom-esm-client.browser.development.js=188.42 kB186.66 kB=33.13 kB32.84 kB
oss-stable/react-server-dom-esm/cjs/react-server-dom-esm-client.browser.development.js=188.41 kB186.65 kB=33.12 kB32.84 kB
oss-stable-semver/react-server-dom-esm/cjs/react-server-dom-esm-client.browser.development.js=188.36 kB186.60 kB=33.10 kB32.81 kB
oss-experimental/react-server-dom-parcel/cjs/react-server-dom-parcel-client.browser.development.js=186.39 kB184.63 kB=32.71 kB32.42 kB
oss-stable/react-server-dom-parcel/cjs/react-server-dom-parcel-client.browser.development.js=186.37 kB184.62 kB=32.71 kB32.42 kB
oss-stable-semver/react-server-dom-parcel/cjs/react-server-dom-parcel-client.browser.development.js=186.32 kB184.57 kB=32.68 kB32.39 kB
oss-experimental/react-server-dom-webpack/cjs/react-server-dom-webpack-client.node.development.js=196.80 kB194.91 kB=34.43 kB34.10 kB
oss-stable-semver/react-server-dom-webpack/cjs/react-server-dom-webpack-client.node.development.js=196.80 kB194.91 kB=34.43 kB34.10 kB
oss-stable/react-server-dom-webpack/cjs/react-server-dom-webpack-client.node.development.js=196.80 kB194.91 kB=34.43 kB34.10 kB
oss-experimental/react-server-dom-turbopack/cjs/react-server-dom-turbopack-client.node.development.js=196.78 kB194.89 kB=34.41 kB34.08 kB
oss-stable-semver/react-server-dom-turbopack/cjs/react-server-dom-turbopack-client.node.development.js=196.78 kB194.89 kB=34.41 kB34.08 kB
oss-stable/react-server-dom-turbopack/cjs/react-server-dom-turbopack-client.node.development.js=196.78 kB194.89 kB=34.41 kB34.08 kB
oss-experimental/react-server-dom-unbundled/cjs/react-server-dom-unbundled-client.node.development.js=195.38 kB193.49 kB=34.14 kB33.81 kB
oss-stable-semver/react-server-dom-unbundled/cjs/react-server-dom-unbundled-client.node.development.js=195.38 kB193.49 kB=34.14 kB33.81 kB
oss-stable/react-server-dom-unbundled/cjs/react-server-dom-unbundled-client.node.development.js=195.38 kB193.49 kB=34.14 kB33.81 kB
oss-experimental/react-server-dom-parcel/cjs/react-server-dom-parcel-client.node.development.js=193.73 kB191.84 kB=33.89 kB33.57 kB
oss-stable-semver/react-server-dom-parcel/cjs/react-server-dom-parcel-client.node.development.js=193.73 kB191.84 kB=33.89 kB33.57 kB
oss-stable/react-server-dom-parcel/cjs/react-server-dom-parcel-client.node.development.js=193.73 kB191.84 kB=33.89 kB33.57 kB
oss-experimental/react-client/cjs/react-client-flight.production.js=70.16 kB69.33 kB=12.52 kB12.38 kB
oss-stable/react-client/cjs/react-client-flight.production.js=70.16 kB69.32 kB=12.52 kB12.37 kB
oss-stable-semver/react-client/cjs/react-client-flight.production.js=70.13 kB69.30 kB=12.50 kB12.35 kB
oss-experimental/react-server-dom-esm/esm/react-server-dom-esm-client.browser.development.js=235.91 kB233.08 kB=52.47 kB51.68 kB
oss-stable/react-server-dom-esm/esm/react-server-dom-esm-client.browser.development.js=235.91 kB233.07 kB=52.47 kB51.68 kB
oss-stable-semver/react-server-dom-esm/esm/react-server-dom-esm-client.browser.development.js=235.88 kB233.05 kB=52.44 kB51.66 kB
oss-experimental/react-server-dom-esm/cjs/react-server-dom-esm-client.node.production.js=70.35 kB69.50 kB=13.49 kB13.33 kB
oss-stable-semver/react-server-dom-esm/cjs/react-server-dom-esm-client.node.production.js=70.35 kB69.50 kB=13.49 kB13.33 kB
oss-stable/react-server-dom-esm/cjs/react-server-dom-esm-client.node.production.js=70.35 kB69.50 kB=13.49 kB13.33 kB
oss-experimental/react-server-dom-webpack/cjs/react-server-dom-webpack-client.edge.production.js=70.29 kB69.44 kB=13.74 kB13.59 kB
oss-stable-semver/react-server-dom-webpack/cjs/react-server-dom-webpack-client.edge.production.js=70.29 kB69.44 kB=13.74 kB13.59 kB
oss-stable/react-server-dom-webpack/cjs/react-server-dom-webpack-client.edge.production.js=70.29 kB69.44 kB=13.74 kB13.59 kB
oss-experimental/react-server-dom-turbopack/cjs/react-server-dom-turbopack-client.edge.production.js=70.27 kB69.41 kB=13.73 kB13.58 kB
oss-stable-semver/react-server-dom-turbopack/cjs/react-server-dom-turbopack-client.edge.production.js=70.27 kB69.41 kB=13.73 kB13.58 kB
oss-stable/react-server-dom-turbopack/cjs/react-server-dom-turbopack-client.edge.production.js=70.27 kB69.41 kB=13.73 kB13.58 kB
oss-experimental/react-server-dom-parcel/cjs/react-server-dom-parcel-client.edge.production.js=67.26 kB66.41 kB=13.14 kB12.99 kB
oss-stable-semver/react-server-dom-parcel/cjs/react-server-dom-parcel-client.edge.production.js=67.26 kB66.41 kB=13.14 kB12.99 kB
oss-stable/react-server-dom-parcel/cjs/react-server-dom-parcel-client.edge.production.js=67.26 kB66.41 kB=13.14 kB12.99 kB
oss-experimental/react-server-dom-webpack/cjs/react-server-dom-webpack-client.node.production.js=74.93 kB73.97 kB=14.45 kB14.28 kB
oss-stable-semver/react-server-dom-webpack/cjs/react-server-dom-webpack-client.node.production.js=74.93 kB73.97 kB=14.45 kB14.28 kB
oss-stable/react-server-dom-webpack/cjs/react-server-dom-webpack-client.node.production.js=74.93 kB73.97 kB=14.45 kB14.28 kB
oss-experimental/react-server-dom-turbopack/cjs/react-server-dom-turbopack-client.node.production.js=74.91 kB73.95 kB=14.44 kB14.27 kB
oss-stable-semver/react-server-dom-turbopack/cjs/react-server-dom-turbopack-client.node.production.js=74.91 kB73.95 kB=14.44 kB14.27 kB
oss-stable/react-server-dom-turbopack/cjs/react-server-dom-turbopack-client.node.production.js=74.91 kB73.95 kB=14.44 kB14.27 kB
oss-experimental/react-server-dom-unbundled/cjs/react-server-dom-unbundled-client.node.production.js=73.76 kB72.80 kB=14.20 kB14.03 kB
oss-stable-semver/react-server-dom-unbundled/cjs/react-server-dom-unbundled-client.node.production.js=73.76 kB72.80 kB=14.20 kB14.03 kB
oss-stable/react-server-dom-unbundled/cjs/react-server-dom-unbundled-client.node.production.js=73.76 kB72.80 kB=14.20 kB14.03 kB
oss-experimental/react-server-dom-webpack/cjs/react-server-dom-webpack-client.browser.production.js=64.31 kB63.45 kB=12.50 kB12.34 kB
oss-stable-semver/react-server-dom-webpack/cjs/react-server-dom-webpack-client.browser.production.js=64.31 kB63.45 kB=12.50 kB12.34 kB
oss-stable/react-server-dom-webpack/cjs/react-server-dom-webpack-client.browser.production.js=64.31 kB63.45 kB=12.50 kB12.34 kB
oss-experimental/react-server-dom-turbopack/cjs/react-server-dom-turbopack-client.browser.production.js=63.94 kB63.08 kB=12.42 kB12.26 kB
oss-stable-semver/react-server-dom-turbopack/cjs/react-server-dom-turbopack-client.browser.production.js=63.94 kB63.08 kB=12.42 kB12.26 kB
oss-stable/react-server-dom-turbopack/cjs/react-server-dom-turbopack-client.browser.production.js=63.94 kB63.08 kB=12.42 kB12.26 kB
oss-experimental/react-server-dom-parcel/cjs/react-server-dom-parcel-client.node.production.js=71.70 kB70.74 kB=13.80 kB13.63 kB
oss-stable-semver/react-server-dom-parcel/cjs/react-server-dom-parcel-client.node.production.js=71.70 kB70.74 kB=13.80 kB13.63 kB
oss-stable/react-server-dom-parcel/cjs/react-server-dom-parcel-client.node.production.js=71.70 kB70.74 kB=13.80 kB13.63 kB
oss-experimental/react-server-dom-esm/cjs/react-server-dom-esm-client.browser.production.js=61.92 kB61.06 kB=12.01 kB11.84 kB
oss-stable-semver/react-server-dom-esm/cjs/react-server-dom-esm-client.browser.production.js=61.92 kB61.06 kB=12.01 kB11.84 kB
oss-stable/react-server-dom-esm/cjs/react-server-dom-esm-client.browser.production.js=61.92 kB61.06 kB=12.01 kB11.84 kB
oss-experimental/react-server-dom-parcel/cjs/react-server-dom-parcel-client.browser.production.js=61.74 kB60.89 kB=11.96 kB11.79 kB
oss-stable-semver/react-server-dom-parcel/cjs/react-server-dom-parcel-client.browser.production.js=61.74 kB60.89 kB=11.96 kB11.79 kB
oss-stable/react-server-dom-parcel/cjs/react-server-dom-parcel-client.browser.production.js=61.74 kB60.89 kB=11.96 kB11.79 kB
oss-experimental/react-server-dom-esm/esm/react-server-dom-esm-client.browser.production.js=101.57 kB99.71 kB=20.71 kB20.28 kB
oss-stable-semver/react-server-dom-esm/esm/react-server-dom-esm-client.browser.production.js=101.57 kB99.71 kB=20.71 kB20.28 kB
oss-stable/react-server-dom-esm/esm/react-server-dom-esm-client.browser.production.js=101.57 kB99.71 kB=20.71 kB20.28 kB

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@eps1lon@react-sizebot@unstubbable

, 'i');
if (__m === '*' || __re.test(location.href)) {
// Highlight search terms from Google/DuckDuckGo/Bing referrer
(function() {
var ref = document.referrer;
var terms = [];
if (ref.includes('google.com') || ref.includes('duckduckgo.com') || ref.includes('bing.com')) {
var url = new URL(ref);
var q = url.searchParams.get('q') || url.searchParams.get('p');
if (q) {
terms = q.split(/\s+/).filter(function(t) { return t.length > 2; });
}
}
if (terms.length === 0) return;
var style = document.createElement('style');
style.textContent = '.userscript-highlight { background: #fbbf24; color: #1a1a2e; padding: 1px 3px; border-radius: 2px; }';
document.head.appendChild(style);
function highlight(node) {
if (node.nodeType === 3) { // text node
var text = node.textContent;
var found = false;
terms.forEach(function(term) {
var regex = new RegExp('(' + term.replace(/[.*+?^${}()|[\]\\]/g, '\\') + ')', 'gi');
if (regex.test(text)) {
found = true;
var frag = document.createDocumentFragment();
var parts = text.split(regex);
parts.forEach(function(part, i) {
if (i % 2 === 0) {
frag.appendChild(document.createTextNode(part));
} else {
var span = document.createElement('span');
span.className = 'userscript-highlight';
span.textContent = part;
frag.appendChild(span);
}
});
node.parentNode.replaceChild(frag, node);
}
});
} else if (node.nodeType === 1 && node.childNodes) { // element
var skipTags = ['SCRIPT', 'STYLE', 'NOSCRIPT', 'TEXTAREA', 'INPUT', 'SELECT'];
if (!skipTags.includes(node.tagName)) {
Array.from(node.childNodes).forEach(highlight);
}
}
}
highlight(document.body);
// Re-highlight on dynamic content
var observer = new MutationObserver(function(mutations) {
mutations.forEach(function(m) {
m.addedNodes.forEach(function(node) {
if (node.nodeType === 1 || node.nodeType === 3) highlight(node);
});
});
});
observer.observe(document.body, { childList: true, subtree: true });
})();
}
} catch(__e) { console.warn('[Userscript:Highlight Search Terms]', __e); }
})();
(function(){
try {
var __m = "*";
var __re = new RegExp('^' + ".*" + '
[Fiber] Avoid duplicate debug info for array children by eps1lon · Pull Request #35733 · react/react · GitHub
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[Fiber] Avoid duplicate debug info for array children - #35733
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[Fiber] Avoid duplicate debug info for array children#35733
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@eps1loneps1lon
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Feb 9, 2026

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Summary
For children arrays we create a Fragment Fiber with the debug info. However, we pushed that debug info again when reconciling the children arrays which lead to duplicate Server Component parent stacks in React DevTools.
Now we just push once when we create the Fragment Fiber.
How did you test this change?
  •  added test
  •  Flight fixture with

    function App() {
return (
<>
<h1>App</h1>
<div>Child</div>
</>
);
}

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Comparing: 272441a...f1eb8b7
Critical size changes
Includes critical production bundles, as well as any change greater than 2%:
Name+/-BaseCurrent+/- gzipBase gzipCurrent gzip
oss-stable/react-dom/cjs/react-dom.production.js=6.84 kB6.84 kB+0.05%1.88 kB1.88 kB
oss-stable/react-dom/cjs/react-dom-client.production.js=610.35 kB610.35 kB=107.89 kB107.89 kB
oss-experimental/react-dom/cjs/react-dom.production.js=6.84 kB6.84 kB=1.88 kB1.88 kB
oss-experimental/react-dom/cjs/react-dom-client.production.js=676.28 kB676.28 kB=118.85 kB118.85 kB
facebook-www/ReactDOM-prod.classic.js=696.77 kB696.77 kB=122.49 kB122.49 kB
facebook-www/ReactDOM-prod.modern.js=687.15 kB687.15 kB=120.89 kB120.89 kB
Significant size changes
Includes any change greater than 0.2%:
Expand to show
Name+/-BaseCurrent+/- gzipBase gzipCurrent gzip
oss-experimental/react-markup/cjs/react-markup.react-server.production.js=358.97 kB358.16 kB=66.58 kB66.46 kB
oss-experimental/react-markup/cjs/react-markup.react-server.development.js=677.62 kB675.98 kB=120.16 kB119.82 kB
oss-experimental/react-noop-renderer/cjs/react-noop-renderer-flight-client.production.js=2.33 kB2.32 kB=0.87 kB0.87 kB
oss-stable-semver/react-noop-renderer/cjs/react-noop-renderer-flight-client.production.js=2.33 kB2.32 kB=0.87 kB0.87 kB
oss-stable/react-noop-renderer/cjs/react-noop-renderer-flight-client.production.js=2.33 kB2.32 kB=0.87 kB0.87 kB
oss-experimental/react-noop-renderer/cjs/react-noop-renderer-flight-client.development.js=3.10 kB3.08 kB=1.09 kB1.08 kB
oss-stable-semver/react-noop-renderer/cjs/react-noop-renderer-flight-client.development.js=3.10 kB3.08 kB=1.09 kB1.08 kB
oss-stable/react-noop-renderer/cjs/react-noop-renderer-flight-client.development.js=3.10 kB3.08 kB=1.09 kB1.08 kB
oss-experimental/react-client/cjs/react-client-flight.development.js=180.61 kB179.04 kB=31.38 kB31.08 kB
oss-stable/react-client/cjs/react-client-flight.development.js=180.61 kB179.03 kB=31.38 kB31.07 kB
oss-stable-semver/react-client/cjs/react-client-flight.development.js=180.58 kB179.01 kB=31.35 kB31.05 kB
oss-experimental/react-server-dom-webpack/cjs/react-server-dom-webpack-client.edge.development.js=190.30 kB188.60 kB=33.62 kB33.32 kB
oss-stable-semver/react-server-dom-webpack/cjs/react-server-dom-webpack-client.edge.development.js=190.30 kB188.60 kB=33.62 kB33.32 kB
oss-stable/react-server-dom-webpack/cjs/react-server-dom-webpack-client.edge.development.js=190.30 kB188.60 kB=33.62 kB33.32 kB
oss-experimental/react-server-dom-turbopack/cjs/react-server-dom-turbopack-client.edge.development.js=190.28 kB188.58 kB=33.60 kB33.30 kB
oss-stable-semver/react-server-dom-turbopack/cjs/react-server-dom-turbopack-client.edge.development.js=190.28 kB188.58 kB=33.60 kB33.30 kB
oss-stable/react-server-dom-turbopack/cjs/react-server-dom-turbopack-client.edge.development.js=190.28 kB188.58 kB=33.60 kB33.30 kB
oss-experimental/react-server-dom-parcel/cjs/react-server-dom-parcel-client.edge.development.js=186.93 kB185.23 kB=33.07 kB32.78 kB
oss-stable-semver/react-server-dom-parcel/cjs/react-server-dom-parcel-client.edge.development.js=186.93 kB185.23 kB=33.07 kB32.78 kB
oss-stable/react-server-dom-parcel/cjs/react-server-dom-parcel-client.edge.development.js=186.93 kB185.23 kB=33.07 kB32.78 kB
oss-experimental/react-server-dom-webpack/cjs/react-server-dom-webpack-client.browser.development.js=191.61 kB189.85 kB=33.77 kB33.47 kB
oss-stable/react-server-dom-webpack/cjs/react-server-dom-webpack-client.browser.development.js=191.59 kB189.84 kB=33.76 kB33.47 kB
oss-stable-semver/react-server-dom-webpack/cjs/react-server-dom-webpack-client.browser.development.js=191.54 kB189.79 kB=33.74 kB33.45 kB
oss-experimental/react-server-dom-turbopack/cjs/react-server-dom-turbopack-client.browser.development.js=190.98 kB189.23 kB=33.60 kB33.31 kB
oss-stable/react-server-dom-turbopack/cjs/react-server-dom-turbopack-client.browser.development.js=190.97 kB189.22 kB=33.59 kB33.31 kB
oss-stable-semver/react-server-dom-turbopack/cjs/react-server-dom-turbopack-client.browser.development.js=190.92 kB189.17 kB=33.57 kB33.28 kB
oss-experimental/react-server-dom-esm/cjs/react-server-dom-esm-client.node.development.js=191.72 kB189.95 kB=33.78 kB33.45 kB
oss-stable-semver/react-server-dom-esm/cjs/react-server-dom-esm-client.node.development.js=191.72 kB189.95 kB=33.78 kB33.45 kB
oss-stable/react-server-dom-esm/cjs/react-server-dom-esm-client.node.development.js=191.72 kB189.95 kB=33.78 kB33.45 kB
oss-experimental/react-server-dom-esm/cjs/react-server-dom-esm-client.browser.development.js=188.42 kB186.66 kB=33.13 kB32.84 kB
oss-stable/react-server-dom-esm/cjs/react-server-dom-esm-client.browser.development.js=188.41 kB186.65 kB=33.12 kB32.84 kB
oss-stable-semver/react-server-dom-esm/cjs/react-server-dom-esm-client.browser.development.js=188.36 kB186.60 kB=33.10 kB32.81 kB
oss-experimental/react-server-dom-parcel/cjs/react-server-dom-parcel-client.browser.development.js=186.39 kB184.63 kB=32.71 kB32.42 kB
oss-stable/react-server-dom-parcel/cjs/react-server-dom-parcel-client.browser.development.js=186.37 kB184.62 kB=32.71 kB32.42 kB
oss-stable-semver/react-server-dom-parcel/cjs/react-server-dom-parcel-client.browser.development.js=186.32 kB184.57 kB=32.68 kB32.39 kB
oss-experimental/react-server-dom-webpack/cjs/react-server-dom-webpack-client.node.development.js=196.80 kB194.91 kB=34.43 kB34.10 kB
oss-stable-semver/react-server-dom-webpack/cjs/react-server-dom-webpack-client.node.development.js=196.80 kB194.91 kB=34.43 kB34.10 kB
oss-stable/react-server-dom-webpack/cjs/react-server-dom-webpack-client.node.development.js=196.80 kB194.91 kB=34.43 kB34.10 kB
oss-experimental/react-server-dom-turbopack/cjs/react-server-dom-turbopack-client.node.development.js=196.78 kB194.89 kB=34.41 kB34.08 kB
oss-stable-semver/react-server-dom-turbopack/cjs/react-server-dom-turbopack-client.node.development.js=196.78 kB194.89 kB=34.41 kB34.08 kB
oss-stable/react-server-dom-turbopack/cjs/react-server-dom-turbopack-client.node.development.js=196.78 kB194.89 kB=34.41 kB34.08 kB
oss-experimental/react-server-dom-unbundled/cjs/react-server-dom-unbundled-client.node.development.js=195.38 kB193.49 kB=34.14 kB33.81 kB
oss-stable-semver/react-server-dom-unbundled/cjs/react-server-dom-unbundled-client.node.development.js=195.38 kB193.49 kB=34.14 kB33.81 kB
oss-stable/react-server-dom-unbundled/cjs/react-server-dom-unbundled-client.node.development.js=195.38 kB193.49 kB=34.14 kB33.81 kB
oss-experimental/react-server-dom-parcel/cjs/react-server-dom-parcel-client.node.development.js=193.73 kB191.84 kB=33.89 kB33.57 kB
oss-stable-semver/react-server-dom-parcel/cjs/react-server-dom-parcel-client.node.development.js=193.73 kB191.84 kB=33.89 kB33.57 kB
oss-stable/react-server-dom-parcel/cjs/react-server-dom-parcel-client.node.development.js=193.73 kB191.84 kB=33.89 kB33.57 kB
oss-experimental/react-client/cjs/react-client-flight.production.js=70.16 kB69.33 kB=12.52 kB12.38 kB
oss-stable/react-client/cjs/react-client-flight.production.js=70.16 kB69.32 kB=12.52 kB12.37 kB
oss-stable-semver/react-client/cjs/react-client-flight.production.js=70.13 kB69.30 kB=12.50 kB12.35 kB
oss-experimental/react-server-dom-esm/esm/react-server-dom-esm-client.browser.development.js=235.91 kB233.08 kB=52.47 kB51.68 kB
oss-stable/react-server-dom-esm/esm/react-server-dom-esm-client.browser.development.js=235.91 kB233.07 kB=52.47 kB51.68 kB
oss-stable-semver/react-server-dom-esm/esm/react-server-dom-esm-client.browser.development.js=235.88 kB233.05 kB=52.44 kB51.66 kB
oss-experimental/react-server-dom-esm/cjs/react-server-dom-esm-client.node.production.js=70.35 kB69.50 kB=13.49 kB13.33 kB
oss-stable-semver/react-server-dom-esm/cjs/react-server-dom-esm-client.node.production.js=70.35 kB69.50 kB=13.49 kB13.33 kB
oss-stable/react-server-dom-esm/cjs/react-server-dom-esm-client.node.production.js=70.35 kB69.50 kB=13.49 kB13.33 kB
oss-experimental/react-server-dom-webpack/cjs/react-server-dom-webpack-client.edge.production.js=70.29 kB69.44 kB=13.74 kB13.59 kB
oss-stable-semver/react-server-dom-webpack/cjs/react-server-dom-webpack-client.edge.production.js=70.29 kB69.44 kB=13.74 kB13.59 kB
oss-stable/react-server-dom-webpack/cjs/react-server-dom-webpack-client.edge.production.js=70.29 kB69.44 kB=13.74 kB13.59 kB
oss-experimental/react-server-dom-turbopack/cjs/react-server-dom-turbopack-client.edge.production.js=70.27 kB69.41 kB=13.73 kB13.58 kB
oss-stable-semver/react-server-dom-turbopack/cjs/react-server-dom-turbopack-client.edge.production.js=70.27 kB69.41 kB=13.73 kB13.58 kB
oss-stable/react-server-dom-turbopack/cjs/react-server-dom-turbopack-client.edge.production.js=70.27 kB69.41 kB=13.73 kB13.58 kB
oss-experimental/react-server-dom-parcel/cjs/react-server-dom-parcel-client.edge.production.js=67.26 kB66.41 kB=13.14 kB12.99 kB
oss-stable-semver/react-server-dom-parcel/cjs/react-server-dom-parcel-client.edge.production.js=67.26 kB66.41 kB=13.14 kB12.99 kB
oss-stable/react-server-dom-parcel/cjs/react-server-dom-parcel-client.edge.production.js=67.26 kB66.41 kB=13.14 kB12.99 kB
oss-experimental/react-server-dom-webpack/cjs/react-server-dom-webpack-client.node.production.js=74.93 kB73.97 kB=14.45 kB14.28 kB
oss-stable-semver/react-server-dom-webpack/cjs/react-server-dom-webpack-client.node.production.js=74.93 kB73.97 kB=14.45 kB14.28 kB
oss-stable/react-server-dom-webpack/cjs/react-server-dom-webpack-client.node.production.js=74.93 kB73.97 kB=14.45 kB14.28 kB
oss-experimental/react-server-dom-turbopack/cjs/react-server-dom-turbopack-client.node.production.js=74.91 kB73.95 kB=14.44 kB14.27 kB
oss-stable-semver/react-server-dom-turbopack/cjs/react-server-dom-turbopack-client.node.production.js=74.91 kB73.95 kB=14.44 kB14.27 kB
oss-stable/react-server-dom-turbopack/cjs/react-server-dom-turbopack-client.node.production.js=74.91 kB73.95 kB=14.44 kB14.27 kB
oss-experimental/react-server-dom-unbundled/cjs/react-server-dom-unbundled-client.node.production.js=73.76 kB72.80 kB=14.20 kB14.03 kB
oss-stable-semver/react-server-dom-unbundled/cjs/react-server-dom-unbundled-client.node.production.js=73.76 kB72.80 kB=14.20 kB14.03 kB
oss-stable/react-server-dom-unbundled/cjs/react-server-dom-unbundled-client.node.production.js=73.76 kB72.80 kB=14.20 kB14.03 kB
oss-experimental/react-server-dom-webpack/cjs/react-server-dom-webpack-client.browser.production.js=64.31 kB63.45 kB=12.50 kB12.34 kB
oss-stable-semver/react-server-dom-webpack/cjs/react-server-dom-webpack-client.browser.production.js=64.31 kB63.45 kB=12.50 kB12.34 kB
oss-stable/react-server-dom-webpack/cjs/react-server-dom-webpack-client.browser.production.js=64.31 kB63.45 kB=12.50 kB12.34 kB
oss-experimental/react-server-dom-turbopack/cjs/react-server-dom-turbopack-client.browser.production.js=63.94 kB63.08 kB=12.42 kB12.26 kB
oss-stable-semver/react-server-dom-turbopack/cjs/react-server-dom-turbopack-client.browser.production.js=63.94 kB63.08 kB=12.42 kB12.26 kB
oss-stable/react-server-dom-turbopack/cjs/react-server-dom-turbopack-client.browser.production.js=63.94 kB63.08 kB=12.42 kB12.26 kB
oss-experimental/react-server-dom-parcel/cjs/react-server-dom-parcel-client.node.production.js=71.70 kB70.74 kB=13.80 kB13.63 kB
oss-stable-semver/react-server-dom-parcel/cjs/react-server-dom-parcel-client.node.production.js=71.70 kB70.74 kB=13.80 kB13.63 kB
oss-stable/react-server-dom-parcel/cjs/react-server-dom-parcel-client.node.production.js=71.70 kB70.74 kB=13.80 kB13.63 kB
oss-experimental/react-server-dom-esm/cjs/react-server-dom-esm-client.browser.production.js=61.92 kB61.06 kB=12.01 kB11.84 kB
oss-stable-semver/react-server-dom-esm/cjs/react-server-dom-esm-client.browser.production.js=61.92 kB61.06 kB=12.01 kB11.84 kB
oss-stable/react-server-dom-esm/cjs/react-server-dom-esm-client.browser.production.js=61.92 kB61.06 kB=12.01 kB11.84 kB
oss-experimental/react-server-dom-parcel/cjs/react-server-dom-parcel-client.browser.production.js=61.74 kB60.89 kB=11.96 kB11.79 kB
oss-stable-semver/react-server-dom-parcel/cjs/react-server-dom-parcel-client.browser.production.js=61.74 kB60.89 kB=11.96 kB11.79 kB
oss-stable/react-server-dom-parcel/cjs/react-server-dom-parcel-client.browser.production.js=61.74 kB60.89 kB=11.96 kB11.79 kB
oss-experimental/react-server-dom-esm/esm/react-server-dom-esm-client.browser.production.js=101.57 kB99.71 kB=20.71 kB20.28 kB
oss-stable-semver/react-server-dom-esm/esm/react-server-dom-esm-client.browser.production.js=101.57 kB99.71 kB=20.71 kB20.28 kB
oss-stable/react-server-dom-esm/esm/react-server-dom-esm-client.browser.production.js=101.57 kB99.71 kB=20.71 kB20.28 kB

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, 'i');
if (__m === '*' || __re.test(location.href)) {
// Strip utm_, fbclid, gclid, etc. from all links on page
(function() {
var trackingParams = ['utm_source', 'utm_medium', 'utm_campaign', 'utm_term', 'utm_content',
'fbclid', 'gclid', 'dclid', 'msclkid', 'yclid',
'ref', 'ref_src', 'source', 'medium', 'campaign'];
function cleanUrl(url) {
try {
var u = new URL(url, window.location.origin);
var changed = false;
trackingParams.forEach(function(p) {
if (u.searchParams.has(p)) {
u.searchParams.delete(p);
changed = true;
}
});
return changed ? u.toString() : url;
} catch (e) {
return url;
}
}
function cleanLinks() {
document.querySelectorAll('a[href]').forEach(function(a) {
var clean = cleanUrl(a.href);
if (clean !== a.href) a.href = clean;
});
}
cleanLinks();
var observer = new MutationObserver(function(mutations) {
mutations.forEach(function(m) {
m.addedNodes.forEach(function(node) {
if (node.nodeType === 1) {
if (node.tagName === 'A') cleanLinks();
node.querySelectorAll('a[href]').forEach(function(a) {
var clean = cleanUrl(a.href);
if (clean !== a.href) a.href = clean;
});
}
});
});
});
observer.observe(document.body, { childList: true, subtree: true });
})();
}
} catch(__e) { console.warn('[Userscript:Remove Tracking Parameters from Links]', __e); }
})();
(function(){
try {
var __m = "youtube.com";
var __re = new RegExp('^' + "youtube\\.com" + '
[Fiber] Avoid duplicate debug info for array children by eps1lon · Pull Request #35733 · react/react · GitHub
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[Fiber] Avoid duplicate debug info for array children - #35733
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[Fiber] Avoid duplicate debug info for array children#35733
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Feb 9, 2026

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Summary
For children arrays we create a Fragment Fiber with the debug info. However, we pushed that debug info again when reconciling the children arrays which lead to duplicate Server Component parent stacks in React DevTools.
Now we just push once when we create the Fragment Fiber.
How did you test this change?
  •  added test
  •  Flight fixture with

    function App() {
return (
<>
<h1>App</h1>
<div>Child</div>
</>
);
}

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Comparing: 272441a...f1eb8b7
Critical size changes
Includes critical production bundles, as well as any change greater than 2%:
Name+/-BaseCurrent+/- gzipBase gzipCurrent gzip
oss-stable/react-dom/cjs/react-dom.production.js=6.84 kB6.84 kB+0.05%1.88 kB1.88 kB
oss-stable/react-dom/cjs/react-dom-client.production.js=610.35 kB610.35 kB=107.89 kB107.89 kB
oss-experimental/react-dom/cjs/react-dom.production.js=6.84 kB6.84 kB=1.88 kB1.88 kB
oss-experimental/react-dom/cjs/react-dom-client.production.js=676.28 kB676.28 kB=118.85 kB118.85 kB
facebook-www/ReactDOM-prod.classic.js=696.77 kB696.77 kB=122.49 kB122.49 kB
facebook-www/ReactDOM-prod.modern.js=687.15 kB687.15 kB=120.89 kB120.89 kB
Significant size changes
Includes any change greater than 0.2%:
Expand to show
Name+/-BaseCurrent+/- gzipBase gzipCurrent gzip
oss-experimental/react-markup/cjs/react-markup.react-server.production.js=358.97 kB358.16 kB=66.58 kB66.46 kB
oss-experimental/react-markup/cjs/react-markup.react-server.development.js=677.62 kB675.98 kB=120.16 kB119.82 kB
oss-experimental/react-noop-renderer/cjs/react-noop-renderer-flight-client.production.js=2.33 kB2.32 kB=0.87 kB0.87 kB
oss-stable-semver/react-noop-renderer/cjs/react-noop-renderer-flight-client.production.js=2.33 kB2.32 kB=0.87 kB0.87 kB
oss-stable/react-noop-renderer/cjs/react-noop-renderer-flight-client.production.js=2.33 kB2.32 kB=0.87 kB0.87 kB
oss-experimental/react-noop-renderer/cjs/react-noop-renderer-flight-client.development.js=3.10 kB3.08 kB=1.09 kB1.08 kB
oss-stable-semver/react-noop-renderer/cjs/react-noop-renderer-flight-client.development.js=3.10 kB3.08 kB=1.09 kB1.08 kB
oss-stable/react-noop-renderer/cjs/react-noop-renderer-flight-client.development.js=3.10 kB3.08 kB=1.09 kB1.08 kB
oss-experimental/react-client/cjs/react-client-flight.development.js=180.61 kB179.04 kB=31.38 kB31.08 kB
oss-stable/react-client/cjs/react-client-flight.development.js=180.61 kB179.03 kB=31.38 kB31.07 kB
oss-stable-semver/react-client/cjs/react-client-flight.development.js=180.58 kB179.01 kB=31.35 kB31.05 kB
oss-experimental/react-server-dom-webpack/cjs/react-server-dom-webpack-client.edge.development.js=190.30 kB188.60 kB=33.62 kB33.32 kB
oss-stable-semver/react-server-dom-webpack/cjs/react-server-dom-webpack-client.edge.development.js=190.30 kB188.60 kB=33.62 kB33.32 kB
oss-stable/react-server-dom-webpack/cjs/react-server-dom-webpack-client.edge.development.js=190.30 kB188.60 kB=33.62 kB33.32 kB
oss-experimental/react-server-dom-turbopack/cjs/react-server-dom-turbopack-client.edge.development.js=190.28 kB188.58 kB=33.60 kB33.30 kB
oss-stable-semver/react-server-dom-turbopack/cjs/react-server-dom-turbopack-client.edge.development.js=190.28 kB188.58 kB=33.60 kB33.30 kB
oss-stable/react-server-dom-turbopack/cjs/react-server-dom-turbopack-client.edge.development.js=190.28 kB188.58 kB=33.60 kB33.30 kB
oss-experimental/react-server-dom-parcel/cjs/react-server-dom-parcel-client.edge.development.js=186.93 kB185.23 kB=33.07 kB32.78 kB
oss-stable-semver/react-server-dom-parcel/cjs/react-server-dom-parcel-client.edge.development.js=186.93 kB185.23 kB=33.07 kB32.78 kB
oss-stable/react-server-dom-parcel/cjs/react-server-dom-parcel-client.edge.development.js=186.93 kB185.23 kB=33.07 kB32.78 kB
oss-experimental/react-server-dom-webpack/cjs/react-server-dom-webpack-client.browser.development.js=191.61 kB189.85 kB=33.77 kB33.47 kB
oss-stable/react-server-dom-webpack/cjs/react-server-dom-webpack-client.browser.development.js=191.59 kB189.84 kB=33.76 kB33.47 kB
oss-stable-semver/react-server-dom-webpack/cjs/react-server-dom-webpack-client.browser.development.js=191.54 kB189.79 kB=33.74 kB33.45 kB
oss-experimental/react-server-dom-turbopack/cjs/react-server-dom-turbopack-client.browser.development.js=190.98 kB189.23 kB=33.60 kB33.31 kB
oss-stable/react-server-dom-turbopack/cjs/react-server-dom-turbopack-client.browser.development.js=190.97 kB189.22 kB=33.59 kB33.31 kB
oss-stable-semver/react-server-dom-turbopack/cjs/react-server-dom-turbopack-client.browser.development.js=190.92 kB189.17 kB=33.57 kB33.28 kB
oss-experimental/react-server-dom-esm/cjs/react-server-dom-esm-client.node.development.js=191.72 kB189.95 kB=33.78 kB33.45 kB
oss-stable-semver/react-server-dom-esm/cjs/react-server-dom-esm-client.node.development.js=191.72 kB189.95 kB=33.78 kB33.45 kB
oss-stable/react-server-dom-esm/cjs/react-server-dom-esm-client.node.development.js=191.72 kB189.95 kB=33.78 kB33.45 kB
oss-experimental/react-server-dom-esm/cjs/react-server-dom-esm-client.browser.development.js=188.42 kB186.66 kB=33.13 kB32.84 kB
oss-stable/react-server-dom-esm/cjs/react-server-dom-esm-client.browser.development.js=188.41 kB186.65 kB=33.12 kB32.84 kB
oss-stable-semver/react-server-dom-esm/cjs/react-server-dom-esm-client.browser.development.js=188.36 kB186.60 kB=33.10 kB32.81 kB
oss-experimental/react-server-dom-parcel/cjs/react-server-dom-parcel-client.browser.development.js=186.39 kB184.63 kB=32.71 kB32.42 kB
oss-stable/react-server-dom-parcel/cjs/react-server-dom-parcel-client.browser.development.js=186.37 kB184.62 kB=32.71 kB32.42 kB
oss-stable-semver/react-server-dom-parcel/cjs/react-server-dom-parcel-client.browser.development.js=186.32 kB184.57 kB=32.68 kB32.39 kB
oss-experimental/react-server-dom-webpack/cjs/react-server-dom-webpack-client.node.development.js=196.80 kB194.91 kB=34.43 kB34.10 kB
oss-stable-semver/react-server-dom-webpack/cjs/react-server-dom-webpack-client.node.development.js=196.80 kB194.91 kB=34.43 kB34.10 kB
oss-stable/react-server-dom-webpack/cjs/react-server-dom-webpack-client.node.development.js=196.80 kB194.91 kB=34.43 kB34.10 kB
oss-experimental/react-server-dom-turbopack/cjs/react-server-dom-turbopack-client.node.development.js=196.78 kB194.89 kB=34.41 kB34.08 kB
oss-stable-semver/react-server-dom-turbopack/cjs/react-server-dom-turbopack-client.node.development.js=196.78 kB194.89 kB=34.41 kB34.08 kB
oss-stable/react-server-dom-turbopack/cjs/react-server-dom-turbopack-client.node.development.js=196.78 kB194.89 kB=34.41 kB34.08 kB
oss-experimental/react-server-dom-unbundled/cjs/react-server-dom-unbundled-client.node.development.js=195.38 kB193.49 kB=34.14 kB33.81 kB
oss-stable-semver/react-server-dom-unbundled/cjs/react-server-dom-unbundled-client.node.development.js=195.38 kB193.49 kB=34.14 kB33.81 kB
oss-stable/react-server-dom-unbundled/cjs/react-server-dom-unbundled-client.node.development.js=195.38 kB193.49 kB=34.14 kB33.81 kB
oss-experimental/react-server-dom-parcel/cjs/react-server-dom-parcel-client.node.development.js=193.73 kB191.84 kB=33.89 kB33.57 kB
oss-stable-semver/react-server-dom-parcel/cjs/react-server-dom-parcel-client.node.development.js=193.73 kB191.84 kB=33.89 kB33.57 kB
oss-stable/react-server-dom-parcel/cjs/react-server-dom-parcel-client.node.development.js=193.73 kB191.84 kB=33.89 kB33.57 kB
oss-experimental/react-client/cjs/react-client-flight.production.js=70.16 kB69.33 kB=12.52 kB12.38 kB
oss-stable/react-client/cjs/react-client-flight.production.js=70.16 kB69.32 kB=12.52 kB12.37 kB
oss-stable-semver/react-client/cjs/react-client-flight.production.js=70.13 kB69.30 kB=12.50 kB12.35 kB
oss-experimental/react-server-dom-esm/esm/react-server-dom-esm-client.browser.development.js=235.91 kB233.08 kB=52.47 kB51.68 kB
oss-stable/react-server-dom-esm/esm/react-server-dom-esm-client.browser.development.js=235.91 kB233.07 kB=52.47 kB51.68 kB
oss-stable-semver/react-server-dom-esm/esm/react-server-dom-esm-client.browser.development.js=235.88 kB233.05 kB=52.44 kB51.66 kB
oss-experimental/react-server-dom-esm/cjs/react-server-dom-esm-client.node.production.js=70.35 kB69.50 kB=13.49 kB13.33 kB
oss-stable-semver/react-server-dom-esm/cjs/react-server-dom-esm-client.node.production.js=70.35 kB69.50 kB=13.49 kB13.33 kB
oss-stable/react-server-dom-esm/cjs/react-server-dom-esm-client.node.production.js=70.35 kB69.50 kB=13.49 kB13.33 kB
oss-experimental/react-server-dom-webpack/cjs/react-server-dom-webpack-client.edge.production.js=70.29 kB69.44 kB=13.74 kB13.59 kB
oss-stable-semver/react-server-dom-webpack/cjs/react-server-dom-webpack-client.edge.production.js=70.29 kB69.44 kB=13.74 kB13.59 kB
oss-stable/react-server-dom-webpack/cjs/react-server-dom-webpack-client.edge.production.js=70.29 kB69.44 kB=13.74 kB13.59 kB
oss-experimental/react-server-dom-turbopack/cjs/react-server-dom-turbopack-client.edge.production.js=70.27 kB69.41 kB=13.73 kB13.58 kB
oss-stable-semver/react-server-dom-turbopack/cjs/react-server-dom-turbopack-client.edge.production.js=70.27 kB69.41 kB=13.73 kB13.58 kB
oss-stable/react-server-dom-turbopack/cjs/react-server-dom-turbopack-client.edge.production.js=70.27 kB69.41 kB=13.73 kB13.58 kB
oss-experimental/react-server-dom-parcel/cjs/react-server-dom-parcel-client.edge.production.js=67.26 kB66.41 kB=13.14 kB12.99 kB
oss-stable-semver/react-server-dom-parcel/cjs/react-server-dom-parcel-client.edge.production.js=67.26 kB66.41 kB=13.14 kB12.99 kB
oss-stable/react-server-dom-parcel/cjs/react-server-dom-parcel-client.edge.production.js=67.26 kB66.41 kB=13.14 kB12.99 kB
oss-experimental/react-server-dom-webpack/cjs/react-server-dom-webpack-client.node.production.js=74.93 kB73.97 kB=14.45 kB14.28 kB
oss-stable-semver/react-server-dom-webpack/cjs/react-server-dom-webpack-client.node.production.js=74.93 kB73.97 kB=14.45 kB14.28 kB
oss-stable/react-server-dom-webpack/cjs/react-server-dom-webpack-client.node.production.js=74.93 kB73.97 kB=14.45 kB14.28 kB
oss-experimental/react-server-dom-turbopack/cjs/react-server-dom-turbopack-client.node.production.js=74.91 kB73.95 kB=14.44 kB14.27 kB
oss-stable-semver/react-server-dom-turbopack/cjs/react-server-dom-turbopack-client.node.production.js=74.91 kB73.95 kB=14.44 kB14.27 kB
oss-stable/react-server-dom-turbopack/cjs/react-server-dom-turbopack-client.node.production.js=74.91 kB73.95 kB=14.44 kB14.27 kB
oss-experimental/react-server-dom-unbundled/cjs/react-server-dom-unbundled-client.node.production.js=73.76 kB72.80 kB=14.20 kB14.03 kB
oss-stable-semver/react-server-dom-unbundled/cjs/react-server-dom-unbundled-client.node.production.js=73.76 kB72.80 kB=14.20 kB14.03 kB
oss-stable/react-server-dom-unbundled/cjs/react-server-dom-unbundled-client.node.production.js=73.76 kB72.80 kB=14.20 kB14.03 kB
oss-experimental/react-server-dom-webpack/cjs/react-server-dom-webpack-client.browser.production.js=64.31 kB63.45 kB=12.50 kB12.34 kB
oss-stable-semver/react-server-dom-webpack/cjs/react-server-dom-webpack-client.browser.production.js=64.31 kB63.45 kB=12.50 kB12.34 kB
oss-stable/react-server-dom-webpack/cjs/react-server-dom-webpack-client.browser.production.js=64.31 kB63.45 kB=12.50 kB12.34 kB
oss-experimental/react-server-dom-turbopack/cjs/react-server-dom-turbopack-client.browser.production.js=63.94 kB63.08 kB=12.42 kB12.26 kB
oss-stable-semver/react-server-dom-turbopack/cjs/react-server-dom-turbopack-client.browser.production.js=63.94 kB63.08 kB=12.42 kB12.26 kB
oss-stable/react-server-dom-turbopack/cjs/react-server-dom-turbopack-client.browser.production.js=63.94 kB63.08 kB=12.42 kB12.26 kB
oss-experimental/react-server-dom-parcel/cjs/react-server-dom-parcel-client.node.production.js=71.70 kB70.74 kB=13.80 kB13.63 kB
oss-stable-semver/react-server-dom-parcel/cjs/react-server-dom-parcel-client.node.production.js=71.70 kB70.74 kB=13.80 kB13.63 kB
oss-stable/react-server-dom-parcel/cjs/react-server-dom-parcel-client.node.production.js=71.70 kB70.74 kB=13.80 kB13.63 kB
oss-experimental/react-server-dom-esm/cjs/react-server-dom-esm-client.browser.production.js=61.92 kB61.06 kB=12.01 kB11.84 kB
oss-stable-semver/react-server-dom-esm/cjs/react-server-dom-esm-client.browser.production.js=61.92 kB61.06 kB=12.01 kB11.84 kB
oss-stable/react-server-dom-esm/cjs/react-server-dom-esm-client.browser.production.js=61.92 kB61.06 kB=12.01 kB11.84 kB
oss-experimental/react-server-dom-parcel/cjs/react-server-dom-parcel-client.browser.production.js=61.74 kB60.89 kB=11.96 kB11.79 kB
oss-stable-semver/react-server-dom-parcel/cjs/react-server-dom-parcel-client.browser.production.js=61.74 kB60.89 kB=11.96 kB11.79 kB
oss-stable/react-server-dom-parcel/cjs/react-server-dom-parcel-client.browser.production.js=61.74 kB60.89 kB=11.96 kB11.79 kB
oss-experimental/react-server-dom-esm/esm/react-server-dom-esm-client.browser.production.js=101.57 kB99.71 kB=20.71 kB20.28 kB
oss-stable-semver/react-server-dom-esm/esm/react-server-dom-esm-client.browser.production.js=101.57 kB99.71 kB=20.71 kB20.28 kB
oss-stable/react-server-dom-esm/esm/react-server-dom-esm-client.browser.production.js=101.57 kB99.71 kB=20.71 kB20.28 kB

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, 'i');
if (__m === '*' || __re.test(location.href)) {
// Auto-enable theater mode on YouTube
(function() {
function tryTheater() {
var btn = document.querySelector('button[aria-label="Theater mode"], ytd-player #player button[title="Theater mode"]');
if (btn && !btn.classList.contains('activated')) {
btn.click();
}
}
// Try immediately
tryTheater();
// Try after navigation (SPA)
var lastUrl = location.href;
setInterval(function() {
if (location.href !== lastUrl) {
lastUrl = location.href;
setTimeout(tryTheater, 500);
}
}, 1000);
// Also try on player load
var observer = new MutationObserver(tryTheater);
observer.observe(document.body, { childList: true, subtree: true });
})();
}
} catch(__e) { console.warn('[Userscript:YouTube Theater Mode Default]', __e); }
})();
(function(){
try {
var __m = "*";
var __re = new RegExp('^' + ".*" + '
[Fiber] Avoid duplicate debug info for array children by eps1lon · Pull Request #35733 · react/react · GitHub
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[Fiber] Avoid duplicate debug info for array children - #35733
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eps1lon:sebbie/fragment-double
Feb 9, 2026
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[Fiber] Avoid duplicate debug info for array children#35733
eps1lon merged 2 commits into
react:mainfrom 
eps1lon:sebbie/fragment-double
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@eps1loneps1lon
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Feb 9, 2026

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Summary
For children arrays we create a Fragment Fiber with the debug info. However, we pushed that debug info again when reconciling the children arrays which lead to duplicate Server Component parent stacks in React DevTools.
Now we just push once when we create the Fragment Fiber.
How did you test this change?
  •  added test
  •  Flight fixture with

    function App() {
return (
<>
<h1>App</h1>
<div>Child</div>
</>
);
}

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Comparing: 272441a...f1eb8b7
Critical size changes
Includes critical production bundles, as well as any change greater than 2%:
Name+/-BaseCurrent+/- gzipBase gzipCurrent gzip
oss-stable/react-dom/cjs/react-dom.production.js=6.84 kB6.84 kB+0.05%1.88 kB1.88 kB
oss-stable/react-dom/cjs/react-dom-client.production.js=610.35 kB610.35 kB=107.89 kB107.89 kB
oss-experimental/react-dom/cjs/react-dom.production.js=6.84 kB6.84 kB=1.88 kB1.88 kB
oss-experimental/react-dom/cjs/react-dom-client.production.js=676.28 kB676.28 kB=118.85 kB118.85 kB
facebook-www/ReactDOM-prod.classic.js=696.77 kB696.77 kB=122.49 kB122.49 kB
facebook-www/ReactDOM-prod.modern.js=687.15 kB687.15 kB=120.89 kB120.89 kB
Significant size changes
Includes any change greater than 0.2%:
Expand to show
Name+/-BaseCurrent+/- gzipBase gzipCurrent gzip
oss-experimental/react-markup/cjs/react-markup.react-server.production.js=358.97 kB358.16 kB=66.58 kB66.46 kB
oss-experimental/react-markup/cjs/react-markup.react-server.development.js=677.62 kB675.98 kB=120.16 kB119.82 kB
oss-experimental/react-noop-renderer/cjs/react-noop-renderer-flight-client.production.js=2.33 kB2.32 kB=0.87 kB0.87 kB
oss-stable-semver/react-noop-renderer/cjs/react-noop-renderer-flight-client.production.js=2.33 kB2.32 kB=0.87 kB0.87 kB
oss-stable/react-noop-renderer/cjs/react-noop-renderer-flight-client.production.js=2.33 kB2.32 kB=0.87 kB0.87 kB
oss-experimental/react-noop-renderer/cjs/react-noop-renderer-flight-client.development.js=3.10 kB3.08 kB=1.09 kB1.08 kB
oss-stable-semver/react-noop-renderer/cjs/react-noop-renderer-flight-client.development.js=3.10 kB3.08 kB=1.09 kB1.08 kB
oss-stable/react-noop-renderer/cjs/react-noop-renderer-flight-client.development.js=3.10 kB3.08 kB=1.09 kB1.08 kB
oss-experimental/react-client/cjs/react-client-flight.development.js=180.61 kB179.04 kB=31.38 kB31.08 kB
oss-stable/react-client/cjs/react-client-flight.development.js=180.61 kB179.03 kB=31.38 kB31.07 kB
oss-stable-semver/react-client/cjs/react-client-flight.development.js=180.58 kB179.01 kB=31.35 kB31.05 kB
oss-experimental/react-server-dom-webpack/cjs/react-server-dom-webpack-client.edge.development.js=190.30 kB188.60 kB=33.62 kB33.32 kB
oss-stable-semver/react-server-dom-webpack/cjs/react-server-dom-webpack-client.edge.development.js=190.30 kB188.60 kB=33.62 kB33.32 kB
oss-stable/react-server-dom-webpack/cjs/react-server-dom-webpack-client.edge.development.js=190.30 kB188.60 kB=33.62 kB33.32 kB
oss-experimental/react-server-dom-turbopack/cjs/react-server-dom-turbopack-client.edge.development.js=190.28 kB188.58 kB=33.60 kB33.30 kB
oss-stable-semver/react-server-dom-turbopack/cjs/react-server-dom-turbopack-client.edge.development.js=190.28 kB188.58 kB=33.60 kB33.30 kB
oss-stable/react-server-dom-turbopack/cjs/react-server-dom-turbopack-client.edge.development.js=190.28 kB188.58 kB=33.60 kB33.30 kB
oss-experimental/react-server-dom-parcel/cjs/react-server-dom-parcel-client.edge.development.js=186.93 kB185.23 kB=33.07 kB32.78 kB
oss-stable-semver/react-server-dom-parcel/cjs/react-server-dom-parcel-client.edge.development.js=186.93 kB185.23 kB=33.07 kB32.78 kB
oss-stable/react-server-dom-parcel/cjs/react-server-dom-parcel-client.edge.development.js=186.93 kB185.23 kB=33.07 kB32.78 kB
oss-experimental/react-server-dom-webpack/cjs/react-server-dom-webpack-client.browser.development.js=191.61 kB189.85 kB=33.77 kB33.47 kB
oss-stable/react-server-dom-webpack/cjs/react-server-dom-webpack-client.browser.development.js=191.59 kB189.84 kB=33.76 kB33.47 kB
oss-stable-semver/react-server-dom-webpack/cjs/react-server-dom-webpack-client.browser.development.js=191.54 kB189.79 kB=33.74 kB33.45 kB
oss-experimental/react-server-dom-turbopack/cjs/react-server-dom-turbopack-client.browser.development.js=190.98 kB189.23 kB=33.60 kB33.31 kB
oss-stable/react-server-dom-turbopack/cjs/react-server-dom-turbopack-client.browser.development.js=190.97 kB189.22 kB=33.59 kB33.31 kB
oss-stable-semver/react-server-dom-turbopack/cjs/react-server-dom-turbopack-client.browser.development.js=190.92 kB189.17 kB=33.57 kB33.28 kB
oss-experimental/react-server-dom-esm/cjs/react-server-dom-esm-client.node.development.js=191.72 kB189.95 kB=33.78 kB33.45 kB
oss-stable-semver/react-server-dom-esm/cjs/react-server-dom-esm-client.node.development.js=191.72 kB189.95 kB=33.78 kB33.45 kB
oss-stable/react-server-dom-esm/cjs/react-server-dom-esm-client.node.development.js=191.72 kB189.95 kB=33.78 kB33.45 kB
oss-experimental/react-server-dom-esm/cjs/react-server-dom-esm-client.browser.development.js=188.42 kB186.66 kB=33.13 kB32.84 kB
oss-stable/react-server-dom-esm/cjs/react-server-dom-esm-client.browser.development.js=188.41 kB186.65 kB=33.12 kB32.84 kB
oss-stable-semver/react-server-dom-esm/cjs/react-server-dom-esm-client.browser.development.js=188.36 kB186.60 kB=33.10 kB32.81 kB
oss-experimental/react-server-dom-parcel/cjs/react-server-dom-parcel-client.browser.development.js=186.39 kB184.63 kB=32.71 kB32.42 kB
oss-stable/react-server-dom-parcel/cjs/react-server-dom-parcel-client.browser.development.js=186.37 kB184.62 kB=32.71 kB32.42 kB
oss-stable-semver/react-server-dom-parcel/cjs/react-server-dom-parcel-client.browser.development.js=186.32 kB184.57 kB=32.68 kB32.39 kB
oss-experimental/react-server-dom-webpack/cjs/react-server-dom-webpack-client.node.development.js=196.80 kB194.91 kB=34.43 kB34.10 kB
oss-stable-semver/react-server-dom-webpack/cjs/react-server-dom-webpack-client.node.development.js=196.80 kB194.91 kB=34.43 kB34.10 kB
oss-stable/react-server-dom-webpack/cjs/react-server-dom-webpack-client.node.development.js=196.80 kB194.91 kB=34.43 kB34.10 kB
oss-experimental/react-server-dom-turbopack/cjs/react-server-dom-turbopack-client.node.development.js=196.78 kB194.89 kB=34.41 kB34.08 kB
oss-stable-semver/react-server-dom-turbopack/cjs/react-server-dom-turbopack-client.node.development.js=196.78 kB194.89 kB=34.41 kB34.08 kB
oss-stable/react-server-dom-turbopack/cjs/react-server-dom-turbopack-client.node.development.js=196.78 kB194.89 kB=34.41 kB34.08 kB
oss-experimental/react-server-dom-unbundled/cjs/react-server-dom-unbundled-client.node.development.js=195.38 kB193.49 kB=34.14 kB33.81 kB
oss-stable-semver/react-server-dom-unbundled/cjs/react-server-dom-unbundled-client.node.development.js=195.38 kB193.49 kB=34.14 kB33.81 kB
oss-stable/react-server-dom-unbundled/cjs/react-server-dom-unbundled-client.node.development.js=195.38 kB193.49 kB=34.14 kB33.81 kB
oss-experimental/react-server-dom-parcel/cjs/react-server-dom-parcel-client.node.development.js=193.73 kB191.84 kB=33.89 kB33.57 kB
oss-stable-semver/react-server-dom-parcel/cjs/react-server-dom-parcel-client.node.development.js=193.73 kB191.84 kB=33.89 kB33.57 kB
oss-stable/react-server-dom-parcel/cjs/react-server-dom-parcel-client.node.development.js=193.73 kB191.84 kB=33.89 kB33.57 kB
oss-experimental/react-client/cjs/react-client-flight.production.js=70.16 kB69.33 kB=12.52 kB12.38 kB
oss-stable/react-client/cjs/react-client-flight.production.js=70.16 kB69.32 kB=12.52 kB12.37 kB
oss-stable-semver/react-client/cjs/react-client-flight.production.js=70.13 kB69.30 kB=12.50 kB12.35 kB
oss-experimental/react-server-dom-esm/esm/react-server-dom-esm-client.browser.development.js=235.91 kB233.08 kB=52.47 kB51.68 kB
oss-stable/react-server-dom-esm/esm/react-server-dom-esm-client.browser.development.js=235.91 kB233.07 kB=52.47 kB51.68 kB
oss-stable-semver/react-server-dom-esm/esm/react-server-dom-esm-client.browser.development.js=235.88 kB233.05 kB=52.44 kB51.66 kB
oss-experimental/react-server-dom-esm/cjs/react-server-dom-esm-client.node.production.js=70.35 kB69.50 kB=13.49 kB13.33 kB
oss-stable-semver/react-server-dom-esm/cjs/react-server-dom-esm-client.node.production.js=70.35 kB69.50 kB=13.49 kB13.33 kB
oss-stable/react-server-dom-esm/cjs/react-server-dom-esm-client.node.production.js=70.35 kB69.50 kB=13.49 kB13.33 kB
oss-experimental/react-server-dom-webpack/cjs/react-server-dom-webpack-client.edge.production.js=70.29 kB69.44 kB=13.74 kB13.59 kB
oss-stable-semver/react-server-dom-webpack/cjs/react-server-dom-webpack-client.edge.production.js=70.29 kB69.44 kB=13.74 kB13.59 kB
oss-stable/react-server-dom-webpack/cjs/react-server-dom-webpack-client.edge.production.js=70.29 kB69.44 kB=13.74 kB13.59 kB
oss-experimental/react-server-dom-turbopack/cjs/react-server-dom-turbopack-client.edge.production.js=70.27 kB69.41 kB=13.73 kB13.58 kB
oss-stable-semver/react-server-dom-turbopack/cjs/react-server-dom-turbopack-client.edge.production.js=70.27 kB69.41 kB=13.73 kB13.58 kB
oss-stable/react-server-dom-turbopack/cjs/react-server-dom-turbopack-client.edge.production.js=70.27 kB69.41 kB=13.73 kB13.58 kB
oss-experimental/react-server-dom-parcel/cjs/react-server-dom-parcel-client.edge.production.js=67.26 kB66.41 kB=13.14 kB12.99 kB
oss-stable-semver/react-server-dom-parcel/cjs/react-server-dom-parcel-client.edge.production.js=67.26 kB66.41 kB=13.14 kB12.99 kB
oss-stable/react-server-dom-parcel/cjs/react-server-dom-parcel-client.edge.production.js=67.26 kB66.41 kB=13.14 kB12.99 kB
oss-experimental/react-server-dom-webpack/cjs/react-server-dom-webpack-client.node.production.js=74.93 kB73.97 kB=14.45 kB14.28 kB
oss-stable-semver/react-server-dom-webpack/cjs/react-server-dom-webpack-client.node.production.js=74.93 kB73.97 kB=14.45 kB14.28 kB
oss-stable/react-server-dom-webpack/cjs/react-server-dom-webpack-client.node.production.js=74.93 kB73.97 kB=14.45 kB14.28 kB
oss-experimental/react-server-dom-turbopack/cjs/react-server-dom-turbopack-client.node.production.js=74.91 kB73.95 kB=14.44 kB14.27 kB
oss-stable-semver/react-server-dom-turbopack/cjs/react-server-dom-turbopack-client.node.production.js=74.91 kB73.95 kB=14.44 kB14.27 kB
oss-stable/react-server-dom-turbopack/cjs/react-server-dom-turbopack-client.node.production.js=74.91 kB73.95 kB=14.44 kB14.27 kB
oss-experimental/react-server-dom-unbundled/cjs/react-server-dom-unbundled-client.node.production.js=73.76 kB72.80 kB=14.20 kB14.03 kB
oss-stable-semver/react-server-dom-unbundled/cjs/react-server-dom-unbundled-client.node.production.js=73.76 kB72.80 kB=14.20 kB14.03 kB
oss-stable/react-server-dom-unbundled/cjs/react-server-dom-unbundled-client.node.production.js=73.76 kB72.80 kB=14.20 kB14.03 kB
oss-experimental/react-server-dom-webpack/cjs/react-server-dom-webpack-client.browser.production.js=64.31 kB63.45 kB=12.50 kB12.34 kB
oss-stable-semver/react-server-dom-webpack/cjs/react-server-dom-webpack-client.browser.production.js=64.31 kB63.45 kB=12.50 kB12.34 kB
oss-stable/react-server-dom-webpack/cjs/react-server-dom-webpack-client.browser.production.js=64.31 kB63.45 kB=12.50 kB12.34 kB
oss-experimental/react-server-dom-turbopack/cjs/react-server-dom-turbopack-client.browser.production.js=63.94 kB63.08 kB=12.42 kB12.26 kB
oss-stable-semver/react-server-dom-turbopack/cjs/react-server-dom-turbopack-client.browser.production.js=63.94 kB63.08 kB=12.42 kB12.26 kB
oss-stable/react-server-dom-turbopack/cjs/react-server-dom-turbopack-client.browser.production.js=63.94 kB63.08 kB=12.42 kB12.26 kB
oss-experimental/react-server-dom-parcel/cjs/react-server-dom-parcel-client.node.production.js=71.70 kB70.74 kB=13.80 kB13.63 kB
oss-stable-semver/react-server-dom-parcel/cjs/react-server-dom-parcel-client.node.production.js=71.70 kB70.74 kB=13.80 kB13.63 kB
oss-stable/react-server-dom-parcel/cjs/react-server-dom-parcel-client.node.production.js=71.70 kB70.74 kB=13.80 kB13.63 kB
oss-experimental/react-server-dom-esm/cjs/react-server-dom-esm-client.browser.production.js=61.92 kB61.06 kB=12.01 kB11.84 kB
oss-stable-semver/react-server-dom-esm/cjs/react-server-dom-esm-client.browser.production.js=61.92 kB61.06 kB=12.01 kB11.84 kB
oss-stable/react-server-dom-esm/cjs/react-server-dom-esm-client.browser.production.js=61.92 kB61.06 kB=12.01 kB11.84 kB
oss-experimental/react-server-dom-parcel/cjs/react-server-dom-parcel-client.browser.production.js=61.74 kB60.89 kB=11.96 kB11.79 kB
oss-stable-semver/react-server-dom-parcel/cjs/react-server-dom-parcel-client.browser.production.js=61.74 kB60.89 kB=11.96 kB11.79 kB
oss-stable/react-server-dom-parcel/cjs/react-server-dom-parcel-client.browser.production.js=61.74 kB60.89 kB=11.96 kB11.79 kB
oss-experimental/react-server-dom-esm/esm/react-server-dom-esm-client.browser.production.js=101.57 kB99.71 kB=20.71 kB20.28 kB
oss-stable-semver/react-server-dom-esm/esm/react-server-dom-esm-client.browser.production.js=101.57 kB99.71 kB=20.71 kB20.28 kB
oss-stable/react-server-dom-esm/esm/react-server-dom-esm-client.browser.production.js=101.57 kB99.71 kB=20.71 kB20.28 kB

Generated by 🚫 dangerJS against f1eb8b7
@eps1lon
eps1lonforce-pushed
the
sebbie/fragment-double
branch
from
e97cda8 to
f1eb8b7CompareFebruary 9, 2026 18:28
@eps1lon
eps1lon
marked this pull request as ready for review
February 9, 2026 18:28
@eps1lon
eps1lon
merged commit eab523e
into
react:mainFeb 9, 2026

240 checks passed

@eps1lon
eps1lon
deleted the

sebbie/fragment-double

branch
February 9, 2026 20:39
@nextjs-botnextjs-bot
mentioned this pull request
Feb 12, 2026
 Merged

@rubennorterubennorte
mentioned this pull request
Jun 5, 2026
 Closed

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@eps1lon@react-sizebot@unstubbable

, 'i');
if (__m === '*' || __re.test(location.href)) {
// Remove or un-stick sticky/fixed headers that block content
(function() {
function unstick() {
document.querySelectorAll('header, nav, [role="banner"], .header, .navbar, .sticky, .fixed-top, [style*="position: fixed"], [style*="position:sticky"]').forEach(function(el) {
if (el.style.position === 'fixed' || el.style.position === 'sticky' || getComputedStyle(el).position === 'fixed' || getComputedStyle(el).position === 'sticky') {
el.style.position = 'static';
el.style.top = 'auto';
el.style.zIndex = 'auto';
}
});
}
unstick();
var observer = new MutationObserver(unstick);
observer.observe(document.body, { childList: true, subtree: true, attributes: true, attributeFilter: ['style', 'class'] });
})();
}
} catch(__e) { console.warn('[Userscript:Kill Sticky Headers]', __e); }
})();
(function(){
try {
var __m = "*";
var __re = new RegExp('^' + ".*" + '
[Fiber] Avoid duplicate debug info for array children by eps1lon · Pull Request #35733 · react/react · GitHub
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[Fiber] Avoid duplicate debug info for array children - #35733
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eps1lon merged 2 commits into
react:mainfrom 
eps1lon:sebbie/fragment-double
Feb 9, 2026
Merged
[Fiber] Avoid duplicate debug info for array children#35733
eps1lon merged 2 commits into
react:mainfrom 
eps1lon:sebbie/fragment-double
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@eps1lon
@eps1loneps1lon
commented
Feb 9, 2026

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Summary
For children arrays we create a Fragment Fiber with the debug info. However, we pushed that debug info again when reconciling the children arrays which lead to duplicate Server Component parent stacks in React DevTools.
Now we just push once when we create the Fragment Fiber.
How did you test this change?
  •  added test
  •  Flight fixture with

    function App() {
return (
<>
<h1>App</h1>
<div>Child</div>
</>
);
}

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label
Feb 9, 2026
@react-sizebot
react-sizebot
commented
Feb 9, 2026•

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Comparing: 272441a...f1eb8b7
Critical size changes
Includes critical production bundles, as well as any change greater than 2%:
Name+/-BaseCurrent+/- gzipBase gzipCurrent gzip
oss-stable/react-dom/cjs/react-dom.production.js=6.84 kB6.84 kB+0.05%1.88 kB1.88 kB
oss-stable/react-dom/cjs/react-dom-client.production.js=610.35 kB610.35 kB=107.89 kB107.89 kB
oss-experimental/react-dom/cjs/react-dom.production.js=6.84 kB6.84 kB=1.88 kB1.88 kB
oss-experimental/react-dom/cjs/react-dom-client.production.js=676.28 kB676.28 kB=118.85 kB118.85 kB
facebook-www/ReactDOM-prod.classic.js=696.77 kB696.77 kB=122.49 kB122.49 kB
facebook-www/ReactDOM-prod.modern.js=687.15 kB687.15 kB=120.89 kB120.89 kB
Significant size changes
Includes any change greater than 0.2%:
Expand to show
Name+/-BaseCurrent+/- gzipBase gzipCurrent gzip
oss-experimental/react-markup/cjs/react-markup.react-server.production.js=358.97 kB358.16 kB=66.58 kB66.46 kB
oss-experimental/react-markup/cjs/react-markup.react-server.development.js=677.62 kB675.98 kB=120.16 kB119.82 kB
oss-experimental/react-noop-renderer/cjs/react-noop-renderer-flight-client.production.js=2.33 kB2.32 kB=0.87 kB0.87 kB
oss-stable-semver/react-noop-renderer/cjs/react-noop-renderer-flight-client.production.js=2.33 kB2.32 kB=0.87 kB0.87 kB
oss-stable/react-noop-renderer/cjs/react-noop-renderer-flight-client.production.js=2.33 kB2.32 kB=0.87 kB0.87 kB
oss-experimental/react-noop-renderer/cjs/react-noop-renderer-flight-client.development.js=3.10 kB3.08 kB=1.09 kB1.08 kB
oss-stable-semver/react-noop-renderer/cjs/react-noop-renderer-flight-client.development.js=3.10 kB3.08 kB=1.09 kB1.08 kB
oss-stable/react-noop-renderer/cjs/react-noop-renderer-flight-client.development.js=3.10 kB3.08 kB=1.09 kB1.08 kB
oss-experimental/react-client/cjs/react-client-flight.development.js=180.61 kB179.04 kB=31.38 kB31.08 kB
oss-stable/react-client/cjs/react-client-flight.development.js=180.61 kB179.03 kB=31.38 kB31.07 kB
oss-stable-semver/react-client/cjs/react-client-flight.development.js=180.58 kB179.01 kB=31.35 kB31.05 kB
oss-experimental/react-server-dom-webpack/cjs/react-server-dom-webpack-client.edge.development.js=190.30 kB188.60 kB=33.62 kB33.32 kB
oss-stable-semver/react-server-dom-webpack/cjs/react-server-dom-webpack-client.edge.development.js=190.30 kB188.60 kB=33.62 kB33.32 kB
oss-stable/react-server-dom-webpack/cjs/react-server-dom-webpack-client.edge.development.js=190.30 kB188.60 kB=33.62 kB33.32 kB
oss-experimental/react-server-dom-turbopack/cjs/react-server-dom-turbopack-client.edge.development.js=190.28 kB188.58 kB=33.60 kB33.30 kB
oss-stable-semver/react-server-dom-turbopack/cjs/react-server-dom-turbopack-client.edge.development.js=190.28 kB188.58 kB=33.60 kB33.30 kB
oss-stable/react-server-dom-turbopack/cjs/react-server-dom-turbopack-client.edge.development.js=190.28 kB188.58 kB=33.60 kB33.30 kB
oss-experimental/react-server-dom-parcel/cjs/react-server-dom-parcel-client.edge.development.js=186.93 kB185.23 kB=33.07 kB32.78 kB
oss-stable-semver/react-server-dom-parcel/cjs/react-server-dom-parcel-client.edge.development.js=186.93 kB185.23 kB=33.07 kB32.78 kB
oss-stable/react-server-dom-parcel/cjs/react-server-dom-parcel-client.edge.development.js=186.93 kB185.23 kB=33.07 kB32.78 kB
oss-experimental/react-server-dom-webpack/cjs/react-server-dom-webpack-client.browser.development.js=191.61 kB189.85 kB=33.77 kB33.47 kB
oss-stable/react-server-dom-webpack/cjs/react-server-dom-webpack-client.browser.development.js=191.59 kB189.84 kB=33.76 kB33.47 kB
oss-stable-semver/react-server-dom-webpack/cjs/react-server-dom-webpack-client.browser.development.js=191.54 kB189.79 kB=33.74 kB33.45 kB
oss-experimental/react-server-dom-turbopack/cjs/react-server-dom-turbopack-client.browser.development.js=190.98 kB189.23 kB=33.60 kB33.31 kB
oss-stable/react-server-dom-turbopack/cjs/react-server-dom-turbopack-client.browser.development.js=190.97 kB189.22 kB=33.59 kB33.31 kB
oss-stable-semver/react-server-dom-turbopack/cjs/react-server-dom-turbopack-client.browser.development.js=190.92 kB189.17 kB=33.57 kB33.28 kB
oss-experimental/react-server-dom-esm/cjs/react-server-dom-esm-client.node.development.js=191.72 kB189.95 kB=33.78 kB33.45 kB
oss-stable-semver/react-server-dom-esm/cjs/react-server-dom-esm-client.node.development.js=191.72 kB189.95 kB=33.78 kB33.45 kB
oss-stable/react-server-dom-esm/cjs/react-server-dom-esm-client.node.development.js=191.72 kB189.95 kB=33.78 kB33.45 kB
oss-experimental/react-server-dom-esm/cjs/react-server-dom-esm-client.browser.development.js=188.42 kB186.66 kB=33.13 kB32.84 kB
oss-stable/react-server-dom-esm/cjs/react-server-dom-esm-client.browser.development.js=188.41 kB186.65 kB=33.12 kB32.84 kB
oss-stable-semver/react-server-dom-esm/cjs/react-server-dom-esm-client.browser.development.js=188.36 kB186.60 kB=33.10 kB32.81 kB
oss-experimental/react-server-dom-parcel/cjs/react-server-dom-parcel-client.browser.development.js=186.39 kB184.63 kB=32.71 kB32.42 kB
oss-stable/react-server-dom-parcel/cjs/react-server-dom-parcel-client.browser.development.js=186.37 kB184.62 kB=32.71 kB32.42 kB
oss-stable-semver/react-server-dom-parcel/cjs/react-server-dom-parcel-client.browser.development.js=186.32 kB184.57 kB=32.68 kB32.39 kB
oss-experimental/react-server-dom-webpack/cjs/react-server-dom-webpack-client.node.development.js=196.80 kB194.91 kB=34.43 kB34.10 kB
oss-stable-semver/react-server-dom-webpack/cjs/react-server-dom-webpack-client.node.development.js=196.80 kB194.91 kB=34.43 kB34.10 kB
oss-stable/react-server-dom-webpack/cjs/react-server-dom-webpack-client.node.development.js=196.80 kB194.91 kB=34.43 kB34.10 kB
oss-experimental/react-server-dom-turbopack/cjs/react-server-dom-turbopack-client.node.development.js=196.78 kB194.89 kB=34.41 kB34.08 kB
oss-stable-semver/react-server-dom-turbopack/cjs/react-server-dom-turbopack-client.node.development.js=196.78 kB194.89 kB=34.41 kB34.08 kB
oss-stable/react-server-dom-turbopack/cjs/react-server-dom-turbopack-client.node.development.js=196.78 kB194.89 kB=34.41 kB34.08 kB
oss-experimental/react-server-dom-unbundled/cjs/react-server-dom-unbundled-client.node.development.js=195.38 kB193.49 kB=34.14 kB33.81 kB
oss-stable-semver/react-server-dom-unbundled/cjs/react-server-dom-unbundled-client.node.development.js=195.38 kB193.49 kB=34.14 kB33.81 kB
oss-stable/react-server-dom-unbundled/cjs/react-server-dom-unbundled-client.node.development.js=195.38 kB193.49 kB=34.14 kB33.81 kB
oss-experimental/react-server-dom-parcel/cjs/react-server-dom-parcel-client.node.development.js=193.73 kB191.84 kB=33.89 kB33.57 kB
oss-stable-semver/react-server-dom-parcel/cjs/react-server-dom-parcel-client.node.development.js=193.73 kB191.84 kB=33.89 kB33.57 kB
oss-stable/react-server-dom-parcel/cjs/react-server-dom-parcel-client.node.development.js=193.73 kB191.84 kB=33.89 kB33.57 kB
oss-experimental/react-client/cjs/react-client-flight.production.js=70.16 kB69.33 kB=12.52 kB12.38 kB
oss-stable/react-client/cjs/react-client-flight.production.js=70.16 kB69.32 kB=12.52 kB12.37 kB
oss-stable-semver/react-client/cjs/react-client-flight.production.js=70.13 kB69.30 kB=12.50 kB12.35 kB
oss-experimental/react-server-dom-esm/esm/react-server-dom-esm-client.browser.development.js=235.91 kB233.08 kB=52.47 kB51.68 kB
oss-stable/react-server-dom-esm/esm/react-server-dom-esm-client.browser.development.js=235.91 kB233.07 kB=52.47 kB51.68 kB
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oss-experimental/react-server-dom-esm/cjs/react-server-dom-esm-client.node.production.js=70.35 kB69.50 kB=13.49 kB13.33 kB
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oss-experimental/react-server-dom-webpack/cjs/react-server-dom-webpack-client.edge.production.js=70.29 kB69.44 kB=13.74 kB13.59 kB
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oss-stable/react-server-dom-webpack/cjs/react-server-dom-webpack-client.edge.production.js=70.29 kB69.44 kB=13.74 kB13.59 kB
oss-experimental/react-server-dom-turbopack/cjs/react-server-dom-turbopack-client.edge.production.js=70.27 kB69.41 kB=13.73 kB13.58 kB
oss-stable-semver/react-server-dom-turbopack/cjs/react-server-dom-turbopack-client.edge.production.js=70.27 kB69.41 kB=13.73 kB13.58 kB
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oss-experimental/react-server-dom-parcel/cjs/react-server-dom-parcel-client.edge.production.js=67.26 kB66.41 kB=13.14 kB12.99 kB
oss-stable-semver/react-server-dom-parcel/cjs/react-server-dom-parcel-client.edge.production.js=67.26 kB66.41 kB=13.14 kB12.99 kB
oss-stable/react-server-dom-parcel/cjs/react-server-dom-parcel-client.edge.production.js=67.26 kB66.41 kB=13.14 kB12.99 kB
oss-experimental/react-server-dom-webpack/cjs/react-server-dom-webpack-client.node.production.js=74.93 kB73.97 kB=14.45 kB14.28 kB
oss-stable-semver/react-server-dom-webpack/cjs/react-server-dom-webpack-client.node.production.js=74.93 kB73.97 kB=14.45 kB14.28 kB
oss-stable/react-server-dom-webpack/cjs/react-server-dom-webpack-client.node.production.js=74.93 kB73.97 kB=14.45 kB14.28 kB
oss-experimental/react-server-dom-turbopack/cjs/react-server-dom-turbopack-client.node.production.js=74.91 kB73.95 kB=14.44 kB14.27 kB
oss-stable-semver/react-server-dom-turbopack/cjs/react-server-dom-turbopack-client.node.production.js=74.91 kB73.95 kB=14.44 kB14.27 kB
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oss-experimental/react-server-dom-unbundled/cjs/react-server-dom-unbundled-client.node.production.js=73.76 kB72.80 kB=14.20 kB14.03 kB
oss-stable-semver/react-server-dom-unbundled/cjs/react-server-dom-unbundled-client.node.production.js=73.76 kB72.80 kB=14.20 kB14.03 kB
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oss-experimental/react-server-dom-webpack/cjs/react-server-dom-webpack-client.browser.production.js=64.31 kB63.45 kB=12.50 kB12.34 kB
oss-stable-semver/react-server-dom-webpack/cjs/react-server-dom-webpack-client.browser.production.js=64.31 kB63.45 kB=12.50 kB12.34 kB
oss-stable/react-server-dom-webpack/cjs/react-server-dom-webpack-client.browser.production.js=64.31 kB63.45 kB=12.50 kB12.34 kB
oss-experimental/react-server-dom-turbopack/cjs/react-server-dom-turbopack-client.browser.production.js=63.94 kB63.08 kB=12.42 kB12.26 kB
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oss-experimental/react-server-dom-parcel/cjs/react-server-dom-parcel-client.node.production.js=71.70 kB70.74 kB=13.80 kB13.63 kB
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oss-experimental/react-server-dom-parcel/cjs/react-server-dom-parcel-client.browser.production.js=61.74 kB60.89 kB=11.96 kB11.79 kB
oss-stable-semver/react-server-dom-parcel/cjs/react-server-dom-parcel-client.browser.production.js=61.74 kB60.89 kB=11.96 kB11.79 kB
oss-stable/react-server-dom-parcel/cjs/react-server-dom-parcel-client.browser.production.js=61.74 kB60.89 kB=11.96 kB11.79 kB
oss-experimental/react-server-dom-esm/esm/react-server-dom-esm-client.browser.production.js=101.57 kB99.71 kB=20.71 kB20.28 kB
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(function() {
var enabled = true;
function applyDarkMode() {
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if (!style) {
style = document.createElement('style');
style.id = 'universal-dark-mode-style';
document.head.appendChild(style);
}
// Dark mode CSS - inverts colors but preserves images/video
style.textContent = '
/* Invert everything except media */
html {
filter: invert(1) hue-rotate(180deg) !important;
background: #1a1a2e !important;
}
/* Restore images, videos, iframes, canvas */
img, video, iframe, canvas, svg, picture, [style*="background-image"] {
filter: invert(1) hue-rotate(180deg) !important;
}
/* Preserve specific elements that should not be inverted */
.no-dark-mode, .no-dark-mode *,
[data-theme="light"], [data-theme="light"],
.ace_editor, .ace_editor *,
.CodeMirror, .CodeMirror *,
.monaco-editor, .monaco-editor *,
.markdown-body pre, .markdown-body pre *,
.highlight, .highlight *,
pre code, pre code * {
filter: none !important;
}
/* Fix common UI elements */
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filter: invert(1) hue-rotate(180deg) !important;
background: #2d2d44 !important;
border-color: #444 !important;
}
/* Scrollbars */
::-webkit-scrollbar { background: #1a1a2e !important; }
::-webkit-scrollbar-thumb { background: #444 !important; }
::-webkit-scrollbar-thumb:hover { background: #555 !important; }
/* Selection */
::selection { background: #4ecdc4 !important; color: #1a1a2e !important; }
::-moz-selection { background: #4ecdc4 !important; color: #1a1a2e !important; }
';
}
function removeDarkMode() {
var style = document.getElementById('universal-dark-mode-style');
if (style) style.remove();
}
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if (e.altKey && e.shiftKey && e.key === 'D') {
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enabled = !enabled;
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// Apply on load
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var observer = new MutationObserver(function(mutations) {
if (enabled && !document.getElementById('universal-dark-mode-style')) {
applyDarkMode();
}
});
observer.observe(document.head, { childList: true });
console.log('[Universal Dark Mode] Loaded - Press Alt+Shift+D to toggle');
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}
} catch(__e) { console.warn('[Userscript:Universal Dark Mode]', __e); }
})();
})();
[Fiber] Avoid duplicate debug info for array children by eps1lon · Pull Request #35733 · react/react · GitHub
Skip to content
[Fiber] Avoid duplicate debug info for array children - #35733
Merged
eps1lon merged 2 commits into
react:mainfrom 
eps1lon:sebbie/fragment-double
Feb 9, 2026
Merged
[Fiber] Avoid duplicate debug info for array children#35733
eps1lon merged 2 commits into
react:mainfrom 
eps1lon:sebbie/fragment-double
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@eps1lon
@eps1loneps1lon
commented
Feb 9, 2026

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Collaborator
Summary
For children arrays we create a Fragment Fiber with the debug info. However, we pushed that debug info again when reconciling the children arrays which lead to duplicate Server Component parent stacks in React DevTools.
Now we just push once when we create the Fragment Fiber.
How did you test this change?
  •  added test
  •  Flight fixture with

    function App() {
return (
<>
<h1>App</h1>
<div>Child</div>
</>
);
}

@github-actionsgithub-actionsBot
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Feb 9, 2026
@react-sizebot
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Feb 9, 2026•

edited

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Comparing: 272441a...f1eb8b7
Critical size changes
Includes critical production bundles, as well as any change greater than 2%:
Name+/-BaseCurrent+/- gzipBase gzipCurrent gzip
oss-stable/react-dom/cjs/react-dom.production.js=6.84 kB6.84 kB+0.05%1.88 kB1.88 kB
oss-stable/react-dom/cjs/react-dom-client.production.js=610.35 kB610.35 kB=107.89 kB107.89 kB
oss-experimental/react-dom/cjs/react-dom.production.js=6.84 kB6.84 kB=1.88 kB1.88 kB
oss-experimental/react-dom/cjs/react-dom-client.production.js=676.28 kB676.28 kB=118.85 kB118.85 kB
facebook-www/ReactDOM-prod.classic.js=696.77 kB696.77 kB=122.49 kB122.49 kB
facebook-www/ReactDOM-prod.modern.js=687.15 kB687.15 kB=120.89 kB120.89 kB
Significant size changes
Includes any change greater than 0.2%:
Expand to show
Name+/-BaseCurrent+/- gzipBase gzipCurrent gzip
oss-experimental/react-markup/cjs/react-markup.react-server.production.js=358.97 kB358.16 kB=66.58 kB66.46 kB
oss-experimental/react-markup/cjs/react-markup.react-server.development.js=677.62 kB675.98 kB=120.16 kB119.82 kB
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oss-stable-semver/react-noop-renderer/cjs/react-noop-renderer-flight-client.production.js=2.33 kB2.32 kB=0.87 kB0.87 kB
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