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https://github.com/facebook/react-native.git
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David Vacca
7d6d5daa2b
Summary: This diff optimizes the caching of Spannable objects managed by the TextLayoutManager class. Previously, these objects were cached using unsing a String representation of the RedableMap (creating this string adds a non trivial cost), this diff improves the caching performance relying on the equals / hashcode methods of the ReadableNativeMap class I created a MC just to have a killswitch Motivation: I was analysing another bug and I found this non performant code changelog: [internal] internal Reviewed By: shergin Differential Revision: D23429365 fbshipit-source-id: 59e5ad0b1b95da992ac393aecfe029da68a8df97
78 lines
3.0 KiB
Java
78 lines
3.0 KiB
Java
/*
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* Copyright (c) Facebook, Inc. and its 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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package com.facebook.react.config;
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/**
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* Hi there, traveller! This configuration class is not meant to be used by end-users of RN. It
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* contains mainly flags for features that are either under active development and not ready for
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* public consumption, or for use in experiments.
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*
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* <p>These values are safe defaults and should not require manual changes.
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*/
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public class ReactFeatureFlags {
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/**
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* Should this application use TurboModules? If yes, then any module that inherits {@link
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* com.facebook.react.turbomodule.core.interfaces.TurboModule} will NOT be passed in to C++
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* CatalystInstanceImpl
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*/
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public static volatile boolean useTurboModules = false;
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/*
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* This feature flag enables logs for Fabric
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*/
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public static boolean enableFabricLogs = false;
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/**
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* Should this application use a {@link com.facebook.react.uimanager.ViewManagerDelegate} (if
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* provided) to update the view properties. If {@code false}, then the generated {@code
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* ...$$PropsSetter} class will be used instead.
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*/
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public static boolean useViewManagerDelegates = false;
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/**
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* Should this application use a {@link com.facebook.react.uimanager.ViewManagerDelegate} (if
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* provided) to execute the view commands. If {@code false}, then {@code receiveCommand} method
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* inside view manager will be called instead.
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*/
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public static boolean useViewManagerDelegatesForCommands = false;
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/**
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* This react flag enables a custom algorithm for the getChildVisibleRect() method in the classes
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* ReactViewGroup, ReactHorizontalScrollView and ReactScrollView.
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*
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* <p>This new algorithm clip child rects if overflow is set to ViewProps.HIDDEN. More details in
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* https://github.com/facebook/react-native/issues/23870 and
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* https://github.com/facebook/react-native/pull/26334
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*
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* <p>The react flag is disabled by default because this is increasing ANRs (T57363204)
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*/
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public static boolean clipChildRectsIfOverflowIsHidden = false;
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/**
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* Temporary feature flat to control a fix in the transition to layoutOnlyViews TODO T61185028:
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* remove this when bug is fixed
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*/
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public static boolean enableTransitionLayoutOnlyViewCleanup = false;
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/** Feature flag to configure eager initialization of Fabric */
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public static boolean eagerInitializeFabric = false;
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/** Feature flag to configure initialization of Fabric surfaces. */
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public static boolean enableFabricStartSurfaceWithLayoutMetrics = true;
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/** Feature flag to use stopSurface when ReactRootView is unmounted. */
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public static boolean enableStopSurfaceOnRootViewUnmount = false;
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/** Use experimental SetState retry mechanism in view? */
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public static boolean enableExperimentalStateUpdateRetry = false;
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/** Enable caching of Spannable objects using equality of ReadableNativeMaps */
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public static boolean enableSpannableCacheByReadableNativeMapEquality = true;
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}
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