mirror of
https://github.com/react/react-native.git
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Genki Kondo
b2454f9e66
Summary:
sSpannableCache is a significant user of Java heap memory - up to 0.22MB is retained by sSpannableCache.
It turns out sSpannableCache was never hitting as hashCode is different for the same attributedString contents. attributedString.getInt("hash") provides the expected hash code.
This indicates removing spannableCache will not affect perf. Will gate just in case though.
Changelog: [Internal]
Reviewed By: mdvacca
Differential Revision: D34900414
fbshipit-source-id: 7563cde6ba9dc153072e7aebede99389ce3153e7
116 lines
4.3 KiB
Java
116 lines
4.3 KiB
Java
/*
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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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package com.facebook.react.config;
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import com.facebook.proguard.annotations.DoNotStripAny;
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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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@DoNotStripAny
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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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* Should this application use the new (Fabric) Renderer? If yes, all rendering in this app will
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* use Fabric instead of the legacy renderer.
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*/
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public static volatile boolean enableFabricRenderer = false;
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/**
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* After TurboModules and Fabric are enabled, we need to ensure that the legacy NativeModule isn't
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* isn't used. So, turn this flag on to trigger warnings whenever the legacy NativeModule system
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* is used.
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*/
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public static volatile boolean warnOnLegacyNativeModuleSystemUse = false;
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/** Should we dispatch TurboModule methods with promise returns to the NativeModules thread? */
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public static volatile boolean enableTurboModulePromiseAsyncDispatch = false;
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/**
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* Experiment:
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*
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* <p>Bridge and Bridgeless mode can run concurrently. This means that there can be two
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* TurboModule systems alive at the same time.
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*
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* <p>The TurboModule system stores all JS callbacks in a global LongLivedObjectCollection. This
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* collection is cleared when the JS VM is torn down. Implication: Tearing down the bridge JSVM
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* invalidates the bridgeless JSVM's callbacks, and vice versa.
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*
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* <p>useGlobalCallbackCleanupScopeUsingRetainJSCallback => Use a retainJSCallbacks lambda to
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* store jsi::Functions into the global LongLivedObjectCollection
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*
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* <p>useTurboModuleManagerCallbackCleanupScope => Use a retainJSCallbacks labmda to store
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* jsi::Functions into a LongLivedObjectCollection owned by the TurboModuleManager
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*/
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public static boolean useGlobalCallbackCleanupScopeUsingRetainJSCallback = false;
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public static boolean useTurboModuleManagerCallbackCleanupScope = false;
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/** This feature flag enables logs for Fabric */
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public static boolean enableFabricLogs = false;
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public static boolean enableRuntimeScheduler = false;
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public static boolean enableRuntimeSchedulerInTurboModule = false;
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/** Feature flag to configure eager attachment of the root view/initialisation of the JS code */
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public static boolean enableEagerRootViewAttachment = false;
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/** Feature flag to configure synchronized queue access for Animated module */
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public static boolean enableSynchronizationForAnimated = false;
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private static boolean mapBufferSerializationEnabled = false;
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/** Enables or disables MapBuffer Serialization */
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public static void setMapBufferSerializationEnabled(boolean enabled) {
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mapBufferSerializationEnabled = enabled;
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}
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public static boolean isMapBufferSerializationEnabled() {
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return mapBufferSerializationEnabled;
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}
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/** Feature Flag to use overflowInset values provided by Yoga */
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private static boolean useOverflowInset = false;
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public static void setUseOverflowInset(boolean enabled) {
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useOverflowInset = enabled;
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}
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public static boolean doesUseOverflowInset() {
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return useOverflowInset;
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}
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public static boolean enableLockFreeEventDispatcher = false;
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public static boolean enableAggressiveEventEmitterCleanup = false;
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public static boolean insertZReorderBarriersOnViewGroupChildren = true;
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public static boolean enableDelayedViewStateDeletion = false;
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/**
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* Feature Flag to control the size of the cache used by TextLayoutManager in Fabric. Used from
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* JNI.
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*/
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public static boolean enableLargeTextMeasureCache = true;
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/** TODO: T113245006 Delete this flag. Enables caching of spannables for text */
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public static boolean enableSpannableCache = false;
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}
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