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Effects list refactor continued: did-bailout flag #19322

Merged
merged 18 commits into from
Jul 16, 2020
Merged

Effects list refactor continued: did-bailout flag #19322

merged 18 commits into from
Jul 16, 2020

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bvaughn
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@bvaughn bvaughn commented Jul 11, 2020 •
edited by sebmarkbage
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Builds on top of #19261

  • Adds an explicit "did bailout" flag rather than checking whether or not children were cloned.
  • Updates subtreeTag to use its own meta values rather than copying effectTag values.

View only the delta.

@facebook-github-bot facebook-github-bot added CLA Signed React Core Team Opened by a member of the React Core Team labels Jul 11, 2020
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Details of bundled changes.

Comparing: 61dd00d...b044185

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Details of bundled changes.

Comparing: 61dd00d...b044185

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File Filesize Diff Gzip Diff Prev Size Current Size Prev Gzip Current Gzip ENV
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@bvaughn bvaughn mentioned this pull request Jul 11, 2020
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@bvaughn bvaughn force-pushed the effects_list_refactor_bailout_flag branch from 0d1a83e to 7171494 Compare July 11, 2020 16:44
@acdlite
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acdlite commented Jul 13, 2020

Overall the implementation looks right, exactly what I had expected. 👍

There are a few other bailout cases in begin phase where we need to set the DidBailout flag. Like:

react/packages/react-reconciler/src/ReactFiberBeginWork.new.js

Lines 1842 to 1848 in 9ea0f67

// Something suspended and we should still be in dehydrated mode.
// Leave the existing child in place.
workInProgress.child = current.child;
// The dehydrated completion pass expects this flag to be there
// but the normal suspense pass doesn't.
workInProgress.effectTag |= DidCapture;
return null;

Basically anywhere there's a return null inside ReactFiberBeginWork. Maybe we should replace all of them with a function call, with a name like reuseCurrentChild.

acdlite
acdlite reviewed Jul 13, 2020
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packages/react-reconciler/src/ReactSubtreeTags.js Outdated
export const DidBailout = /* */ 0b0001;
export const BeforeMutation = /* */ 0b0010;
export const Mutation = /* */ 0b0100;
export const Layout = /* */ 0b1000;
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As a follow up, we should move the Incomplete, ShouldCapture, and DidCapture flags to this new field.

This was referenced Nov 8, 2024
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@sebmarkbage sebmarkbage sebmarkbage approved these changes

@gaearon gaearon Awaiting requested review from gaearon

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@bvaughn @sizebot @acdlite @sebmarkbage @trueadm @lunaruan @facebook-github-bot