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eb259b5d3b
## Summary We currently do deep diffing for object props, and also use custom differs, if they are defined, for props with custom attribute config. The idea is to simply do a `===` comparison instead of all that work. We will do less computation on the JS side, but send more data to native. The hypothesis is that this change should be neutral in terms of performance. If that's the case, we'll be able to get rid of custom differs, and be one step closer to deleting view configs. This PR adds the `enableShallowPropDiffing` feature flag to support this experiment. ## How did you test this change? With `enableShallowPropDiffing` hardcoded to `true`: ``` yarn test packages/react-native-renderer ``` This fails on the following test cases: - should use the diff attribute - should do deep diffs of Objects by default - should skip deeply-nested changed functions Which makes sense with this change. These test cases should be deleted if the experiment is shipped.
104 lines
4.0 KiB
JavaScript
104 lines
4.0 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.test-renderer';
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export const debugRenderPhaseSideEffectsForStrictMode = false;
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export const enableDebugTracing = false;
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export const enableAsyncDebugInfo = false;
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export const enableSchedulingProfiler = false;
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export const enableProfilerTimer = __PROFILE__;
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export const enableProfilerCommitHooks = __PROFILE__;
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export const enableProfilerNestedUpdatePhase = __PROFILE__;
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export const enableUpdaterTracking = false;
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export const enableCache = true;
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export const enableLegacyCache = __EXPERIMENTAL__;
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export const enableBinaryFlight = true;
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export const enableFlightReadableStream = true;
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export const enableAsyncIterableChildren = false;
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export const enableTaint = true;
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export const enablePostpone = false;
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export const disableCommentsAsDOMContainers = true;
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export const disableInputAttributeSyncing = false;
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export const disableIEWorkarounds = true;
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export const enableScopeAPI = false;
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export const enableCreateEventHandleAPI = false;
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export const enableSuspenseCallback = false;
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export const enableTrustedTypesIntegration = false;
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export const disableTextareaChildren = false;
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export const enableSuspenseAvoidThisFallback = false;
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export const enableSuspenseAvoidThisFallbackFizz = false;
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export const enableCPUSuspense = false;
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export const enableUseMemoCacheHook = true;
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export const enableNoCloningMemoCache = false;
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export const enableUseEffectEventHook = false;
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export const favorSafetyOverHydrationPerf = true;
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export const enableComponentStackLocations = true;
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export const enableLegacyFBSupport = false;
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export const enableFilterEmptyStringAttributesDOM = true;
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export const enableGetInspectorDataForInstanceInProduction = false;
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export const enableRetryLaneExpiration = 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 disableSchedulerTimeoutInWorkLoop = false;
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export const enableLazyContextPropagation = false;
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export const enableLegacyHidden = false;
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export const forceConcurrentByDefaultForTesting = false;
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export const enableUnifiedSyncLane = __EXPERIMENTAL__;
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export const allowConcurrentByDefault = false;
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export const consoleManagedByDevToolsDuringStrictMode = false;
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export const enableTransitionTracing = false;
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export const useModernStrictMode = false;
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export const enableDO_NOT_USE_disableStrictPassiveEffect = false;
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export const enableFizzExternalRuntime = true;
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export const enableDeferRootSchedulingToMicrotask = true;
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export const enableAsyncActions = true;
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export const alwaysThrottleRetries = true;
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export const passChildrenWhenCloningPersistedNodes = false;
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export const enableUseDeferredValueInitialArg = __EXPERIMENTAL__;
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export const disableClientCache = true;
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export const enableServerComponentLogs = true;
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export const enableInfiniteRenderLoopDetection = false;
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export const enableAddPropertiesFastPath = false;
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export const renameElementSymbol = true;
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export const enableShallowPropDiffing = false;
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// TODO: This must be in sync with the main ReactFeatureFlags file because
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// the Test Renderer's value must be the same as the one used by the
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// react package.
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//
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// We really need to get rid of this whole module. Any test renderer specific
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// flags should be handled by the Fiber config.
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// const __NEXT_MAJOR__ = __EXPERIMENTAL__;
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export const enableRefAsProp = true;
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export const disableStringRefs = true;
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export const enableFastJSX = true;
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export const disableLegacyMode = true;
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export const disableLegacyContext = true;
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export const enableRenderableContext = true;
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export const enableReactTestRendererWarning = true;
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export const disableDefaultPropsExceptForClasses = true;
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export const enableOwnerStacks = 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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