mirror of
https://github.com/facebook/react.git
synced 2025-11-01 09:12:30 +00:00
Dmytro Rykun
bb9a24d9fc
## Summary `fastAddProperties` has shown some perf benefits when used for creating props payload for new components. In this PR we'll try to use it for diffing props for existing components. It would be good enough if it simply doesn't regress perf. We'll be able to delete the old `addProperties`, and make `fastAddProperties` the default behaviour. ## How did you test this change? ``` yarn lint yarn flow native yarn test packages/react-native-renderer -r=xplat --variant=false yarn test packages/react-native-renderer -r=xplat --variant=true ```
88 lines
3.6 KiB
JavaScript
88 lines
3.6 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
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*/
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import typeof * as FeatureFlagsType from 'shared/ReactFeatureFlags';
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import typeof * as ExportsType from './ReactFeatureFlags.native-fb';
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import typeof * as DynamicExportsType from './ReactFeatureFlags.native-fb-dynamic';
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// Re-export dynamic flags from the internal module.
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// Intentionally using * because this import is compiled to a `require` call.
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import * as dynamicFlagsUntyped from 'ReactNativeInternalFeatureFlags';
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const dynamicFlags: DynamicExportsType = (dynamicFlagsUntyped: any);
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// We destructure each value before re-exporting to avoid a dynamic look-up on
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// the exports object every time a flag is read.
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export const {
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alwaysThrottleRetries,
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enableFabricCompleteRootInCommitPhase,
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enableHiddenSubtreeInsertionEffectCleanup,
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enableObjectFiber,
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enablePersistedModeClonedFlag,
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enableShallowPropDiffing,
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enableUseResourceEffectHook,
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passChildrenWhenCloningPersistedNodes,
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enableSiblingPrerendering,
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enableOwnerStacks,
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enableRemoveConsolePatches,
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enableFastAddPropertiesInDiffing,
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} = dynamicFlags;
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// The rest of the flags are static for better dead code elimination.
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export const disableClientCache = true;
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export const disableCommentsAsDOMContainers = true;
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export const disableDefaultPropsExceptForClasses = true;
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export const disableInputAttributeSyncing = false;
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export const disableLegacyContext = false;
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export const disableLegacyContextForFunctionComponents = false;
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export const disableLegacyMode = false;
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export const disableSchedulerTimeoutInWorkLoop = false;
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export const disableTextareaChildren = false;
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export const enableAsyncDebugInfo = false;
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export const enableAsyncIterableChildren = false;
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export const enableCPUSuspense = true;
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export const enableCreateEventHandleAPI = false;
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export const enableDO_NOT_USE_disableStrictPassiveEffect = false;
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export const enableMoveBefore = true;
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export const enableFizzExternalRuntime = true;
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export const enableHalt = false;
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export const enableInfiniteRenderLoopDetection = false;
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export const enableLegacyCache = false;
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export const enableLegacyFBSupport = false;
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export const enableLegacyHidden = false;
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export const enableNoCloningMemoCache = false;
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export const enablePostpone = false;
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export const enableProfilerCommitHooks = __PROFILE__;
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export const enableProfilerNestedUpdatePhase = __PROFILE__;
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export const enableProfilerTimer = __PROFILE__;
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export const enableReactTestRendererWarning = false;
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export const enableRenderableContext = true;
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export const enableRetryLaneExpiration = false;
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export const enableSchedulingProfiler = __PROFILE__;
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export const enableComponentPerformanceTrack = false;
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export const enableScopeAPI = false;
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export const enableSuspenseAvoidThisFallback = false;
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export const enableSuspenseCallback = true;
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export const enableTaint = true;
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export const enableTransitionTracing = false;
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export const enableTrustedTypesIntegration = false;
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export const enableUpdaterTracking = __PROFILE__;
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export const enableUseEffectEventHook = false;
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export const favorSafetyOverHydrationPerf = true;
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export const renameElementSymbol = false;
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export const retryLaneExpirationMs = 5000;
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export const syncLaneExpirationMs = 250;
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export const transitionLaneExpirationMs = 5000;
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export const enableHydrationLaneScheduling = true;
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export const enableYieldingBeforePassive = false;
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export const enableThrottledScheduling = false;
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export const enableViewTransition = false;
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// Flow magic to verify the exports of this file match the original version.
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((((null: any): ExportsType): FeatureFlagsType): ExportsType);
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