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Add unstable_concurrentUpdatesByDefault #21227

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merged 1 commit into from
Apr 28, 2021

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rickhanlonii
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Overview

Adds a flag to opt-into time-slicing by default per root.

@facebook-github-bot facebook-github-bot added CLA Signed React Core Team Opened by a member of the React Core Team labels Apr 10, 2021
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sizebot commented Apr 10, 2021

Comparing: 86f3385...edd58eb

Critical size changes

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

Name +/- Base Current +/- gzip Base gzip Current gzip
oss-stable/react-dom/cjs/react-dom.production.min.js = 122.49 kB 122.49 kB = 39.38 kB 39.38 kB
oss-experimental/react-dom/cjs/react-dom.production.min.js = 129.02 kB 129.02 kB = 41.46 kB 41.46 kB
facebook-www/ReactDOM-prod.classic.js +0.15% 406.28 kB 406.89 kB +0.07% 75.26 kB 75.31 kB
facebook-www/ReactDOM-prod.modern.js +0.11% 394.31 kB 394.75 kB +0.07% 73.29 kB 73.34 kB
facebook-www/ReactDOMForked-prod.classic.js +0.15% 406.28 kB 406.89 kB +0.07% 75.26 kB 75.31 kB

Significant size changes

Includes any change greater than 0.2%:

Expand to show
Name +/- Base Current +/- gzip Base gzip Current gzip
facebook-www/ReactTestRenderer-dev.classic.js +0.22% 620.35 kB 621.73 kB +0.20% 133.49 kB 133.75 kB
facebook-www/ReactTestRenderer-dev.modern.js +0.22% 620.37 kB 621.74 kB +0.20% 133.50 kB 133.76 kB

Generated by 🚫 dangerJS against edd58eb

@dai-shi
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dai-shi commented Apr 10, 2021

(Let me leave a minor note here as I have been curious about the wording. Do they all mean the same thing? concurrent updates concurrent rendering time slicing concurrent mode. Hope the future documentation clarifies it.)

@sebmarkbage
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What is this for? Can we feature flag it if it's internal only?

@rickhanlonii
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@sebmarkbage internally some roots will be sync by default and others will opt-in to time-slicing.

@rickhanlonii
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@dai-shi good question:

  • concurrent updates: Updates that are rendered concurrently. For example, updates wrapped in startTransition.
  • concurrent rendering: Renders that happen concurrently. These will render with time-slicing, potentially at the same time as other renders.
  • time slicing: Rendering that yields to other work, like the browser or other rendering tasks. See here for more info.
  • concurrent mode: This isn't well defined any more because there's not a single mode that turns on concurrent rendering everywhere, but different features that opt-into concurrent rendering in certain situations.

@rickhanlonii rickhanlonii force-pushed the rh-root-sync-option branch 3 times, most recently from b820aed to 4c3bdd6 Compare April 10, 2021 15:53
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Nit: Could wrap the root option in the flag to save a ridiculously small number of bytes and perhaps alleviate Seb's concern that it will leak to open source

@rickhanlonii rickhanlonii merged commit 9e9dac6 into facebook:master Apr 28, 2021
@rickhanlonii rickhanlonii deleted the rh-root-sync-option branch April 28, 2021 20:09
facebook-github-bot pushed a commit to facebook/react-native that referenced this pull request May 11, 2021
Summary:
This sync includes the following changes:
- **[b8fda6cab](facebook/react@b8fda6cab )**: [React Native] Set allowConcurrentByDefault = true ([#21491](facebook/react#21491)) //<Ricky>//
- **[1bb8987cc](facebook/react@1bb8987cc )**: Renamed function in error log issue #21446 ([#21449](facebook/react#21449)) //<faebzz>//
- **[bd070eb2c](facebook/react@bd070eb2c )**: Enable setJSResponder/setIsJSResponder for React Native Fabric ([#21439](facebook/react#21439)) //<Joshua Gross>//
- **[e9a4a44aa](facebook/react@e9a4a44aa )**: Add back root override for strict mode ([#21428](facebook/react#21428)) //<Ricky>//
- **[d1542de3a](facebook/react@d1542de3a )**: Unify React.memo and React.forwardRef display name logic ([#21392](facebook/react#21392)) //<Brian Vaughn>//
- **[9a130e1de](facebook/react@9a130e1de )**: StrictMode includes strict effects by default ([#21418](facebook/react#21418)) //<Brian Vaughn>//
- **[15fb8c304](facebook/react@15fb8c304 )**: createRoot API is no longer strict by default ([#21417](facebook/react#21417)) //<Brian Vaughn>//
- **[aea7c2aab](facebook/react@aea7c2aab )**: Re-land "Support nesting of startTransition and flushSync (alt) ([#21149](facebook/react#21149))" //<Andrew Clark>//
- **[bacc87068](facebook/react@bacc87068 )**: Re-land "Flush discrete passive effects before paint ([#21150](facebook/react#21150))" //<Andrew Clark>//
- **[098600c42](facebook/react@098600c42 )**: Re-land "Fix: flushSync changes priority inside effect ([#21122](facebook/react#21122))" //<Andrew Clark>//
- **[df420bc0a](facebook/react@df420bc0a )**: Re-land "Delete LanePriority type ([#21090](facebook/react#21090))" //<Andrew Clark>//
- **[ab5b37927](facebook/react@ab5b37927 )**: Re-land "Clean up host pointers in level 2 of clean-up flag ([#21112](facebook/react#21112))" //<Andrew Clark>//
- **[fd907c1f1](facebook/react@fd907c1f1 )**: Re-land "Use highest priority lane to detect interruptions ([#21088](facebook/react#21088))"" //<Andrew Clark>//
- **[269dd6ec5](facebook/react@269dd6ec5 )**: subtreeFlag warning: Fix legacy suspense false positive ([#21388](facebook/react#21388)) //<Andrew Clark>//
- **[9e9dac650](facebook/react@9e9dac650 )**: Add unstable_concurrentUpdatesByDefault ([#21227](facebook/react#21227)) //<Ricky>//
- **[86f3385d9](facebook/react@86f3385d9 )**: Revert "Use highest priority lane to detect interruptions ([#21088](facebook/react#21088))" //<Andrew Clark>//
- **[c6702656f](facebook/react@c6702656f )**: Revert "Clean up host pointers in level 2 of clean-up flag ([#21112](facebook/react#21112))" //<Andrew Clark>//
- **[1bd41c664](facebook/react@1bd41c664 )**: Revert "Delete LanePriority type ([#21090](facebook/react#21090))" //<Andrew Clark>//
- **[e7e0a90bd](facebook/react@e7e0a90bd )**: Revert "Fix: flushSync changes priority inside effect ([#21122](facebook/react#21122))" //<Andrew Clark>//
- **[7bac7607a](facebook/react@7bac7607a )**: Revert "Flush discrete passive effects before paint ([#21150](facebook/react#21150))" //<Andrew Clark>//
- **[207d4c3a5](facebook/react@207d4c3a5 )**: Revert "Support nesting of startTransition and flushSync (alt) ([#21149](facebook/react#21149))" //<Andrew Clark>//

Changelog:
[General][Changed] - React Native sync for revisions 2a7bb41...b8fda6c

jest_e2e[run_all_tests]

Reviewed By: yungsters

Differential Revision: D28351439

fbshipit-source-id: 29620f96c9fb9f02b0d856111d3882d3c69fd1c5
koto pushed a commit to koto/react that referenced this pull request Jun 15, 2021
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