mirror of
https://github.com/facebook/react-native.git
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Ruslan Shestopalyuk
41c17ddd56
Summary: Makes sure that we don't spam too often the JS performance entry reporting callback, which further dispatches entries to `PerformanceObserver` instances. The logic is as following: * ~~~If internal buffer of entries reaches the limit, we schedule the callback (with background priority)~~~ *~~~ Once the callback is processed, we schedule the next flush after a timeout of 500ms, this will also be scheduled from native with background priority~~~ * ~~~Whenever new performance type starts to be observed, we also schedule the callback, in order to prime the above~~~ * Schedule the flush with low priority, whenever there is the first entry coming into an empty buffer, and rely on the Scheduler to "do the right thing" when asked to flush it with background priority and not doo it exceedingly often (see the prolonged discussion) Changelog: [internal] Reviewed By: rubennorte Differential Revision: D41875085 fbshipit-source-id: 368b525203215350ceabb43d5e9e8e3bd5242aca
47 lines
1.3 KiB
JavaScript
47 lines
1.3 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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*/
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import type {TurboModule} from '../TurboModule/RCTExport';
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import * as TurboModuleRegistry from '../TurboModule/TurboModuleRegistry';
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export const RawPerformanceEntryTypeValues = {
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UNDEFINED: 0,
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MARK: 1,
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MEASURE: 2,
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};
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export type RawPerformanceEntryType = number;
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export type RawPerformanceEntry = {|
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name: string,
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entryType: RawPerformanceEntryType,
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startTime: number,
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duration: number,
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// For "event" entries only:
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processingStart?: number,
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processingEnd?: number,
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interactionId?: number,
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|};
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export interface Spec extends TurboModule {
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+startReporting: (entryType: string) => void;
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+stopReporting: (entryType: string) => void;
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// TODO: This is unused and only kept for the compatibility check.
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// Clean it up once the API is complete.
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+getPendingEntries: () => $ReadOnlyArray<RawPerformanceEntry>;
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+popPendingEntries?: () => $ReadOnlyArray<RawPerformanceEntry>;
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+setOnPerformanceEntryCallback: (callback?: () => void) => void;
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}
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export default (TurboModuleRegistry.get<Spec>(
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'NativePerformanceObserverCxx',
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): ?Spec);
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