mirror of
https://github.com/facebook/react.git
synced 2025-11-01 09:12:30 +00:00
Rubén Norte
f83903bfcc
## Summary In React Native, public instances and internal host nodes are not represented by the same object (ReactNativeElement & shadow nodes vs. just DOM elements), and the only one that's required for rendering is the shadow node. Public instances are generally only necessary when accessed via refs or events, and that usually happens for a small amount of components in the tree. This implements an optimization to create the public instance on demand, instead of eagerly creating it when creating the host node. We expect this to improve performance by reducing the logic we do per node and the number of object allocations. ## How did you test this change? Manually synced the changes to React Native and run Fantom tests and benchmarks, with the flag enabled and disabled. All tests pass in both cases, and benchmarks show a slight but consistent performance improvement.
32 lines
1.4 KiB
JavaScript
32 lines
1.4 KiB
JavaScript
/**
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* Copyright (c) Meta Platforms, Inc. and affiliates.
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*
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* This source code is licensed under the MIT license found in the
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* LICENSE file in the root directory of this source tree.
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*
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* @flow strict
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*/
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// In xplat, these flags are controlled by GKs. Because most GKs have some
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// population running in either mode, we should run our tests that way, too,
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//
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// Use __VARIANT__ to simulate a GK. The tests will be run twice: once
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// with the __VARIANT__ set to `true`, and once set to `false`.
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//
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// TODO: __VARIANT__ isn't supported for React Native flags yet. You can set the
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// flag here but it won't be set to `true` in any of our test runs. Need to
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// add a test configuration for React Native.
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export const alwaysThrottleRetries = __VARIANT__;
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export const enableObjectFiber = __VARIANT__;
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export const enableHiddenSubtreeInsertionEffectCleanup = __VARIANT__;
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export const enablePersistedModeClonedFlag = __VARIANT__;
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export const enableShallowPropDiffing = __VARIANT__;
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export const passChildrenWhenCloningPersistedNodes = __VARIANT__;
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export const enableSiblingPrerendering = __VARIANT__;
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export const enableUseEffectCRUDOverload = __VARIANT__;
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export const enableOwnerStacks = __VARIANT__;
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export const enableRemoveConsolePatches = __VARIANT__;
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export const enableFastAddPropertiesInDiffing = __VARIANT__;
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export const enableLazyPublicInstanceInFabric = __VARIANT__;
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