66 lines
2.1 KiB
JavaScript
66 lines
2.1 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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* @format
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* @oncall react_native
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*/
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// flowlint unsafe-getters-setters:off
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import type {ReactNativeStartupTiming as ReactNativeStartupTimingType} from './NativePerformance';
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// Read-only object with RN startup timing information.
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// This is returned by the performance.reactNativeStartup API.
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export default class ReactNativeStartupTiming {
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// All time information here are in ms. To match web spec,
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// the default value for timings are zero if not present.
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// See https://www.w3.org/TR/performance-timeline/#performancetiming-interface
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_startTime = 0;
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_endTime = 0;
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_executeJavaScriptBundleEntryPointStart = 0;
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_executeJavaScriptBundleEntryPointEnd = 0;
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constructor(startUpTiming: ?ReactNativeStartupTimingType) {
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if (startUpTiming != null) {
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this._startTime = startUpTiming.startTime;
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this._endTime = startUpTiming.endTime;
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this._executeJavaScriptBundleEntryPointStart =
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startUpTiming.executeJavaScriptBundleEntryPointStart;
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this._executeJavaScriptBundleEntryPointEnd =
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startUpTiming.executeJavaScriptBundleEntryPointEnd;
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}
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}
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/**
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* Start time of the RN app startup process. This is provided by the platform by implementing the `ReactMarker.setAppStartTime` API in the native platform code.
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*/
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get startTime(): number {
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return this._startTime;
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}
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/**
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* End time of the RN app startup process. This is equal to `executeJavaScriptBundleEntryPointEnd`.
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*/
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get endTime(): number {
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return this._endTime;
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}
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/**
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* Start time of JS bundle being executed. This indicates the RN JS bundle is loaded and start to be evaluated.
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*/
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get executeJavaScriptBundleEntryPointStart(): number {
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return this._executeJavaScriptBundleEntryPointStart;
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}
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/**
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* End time of JS bundle being executed. This indicates all the synchronous entry point jobs are finished.
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*/
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get executeJavaScriptBundleEntryPointEnd(): number {
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return this._executeJavaScriptBundleEntryPointEnd;
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}
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}
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