@react-native/dev-middleware/dist/inspector-proxy/EventLoopPerfTracker.js.flow

Dev server middleware for React Native

/**
 * Copyright (c) Meta Platforms, Inc. and affiliates.
 *
 * This source code is licensed under the MIT license found in the
 * LICENSE file in the root directory of this source tree.
 *
 * @flow strict-local
 * @format
 */

// $FlowFixMe[cannot-resolve-module] libdef missing in RN OSS
import type { DebuggerSessionIDs } from "../types/EventReporter";

export type EventLoopPerfTrackerArgs = {
  perfMeasurementDuration: number,
  minDelayPercentToReport: number,
  onHighDelay: (args: OnHighDelayArgs) => void,
};

export type OnHighDelayArgs = {
  eventLoopUtilization: number,
  maxEventLoopDelayPercent: number,
  duration: number,
  debuggerSessionIDs: DebuggerSessionIDs,
  connectionUptime: number,
};

declare export default class EventLoopPerfTracker {
  constructor(args: EventLoopPerfTrackerArgs): void;
  trackPerfThrottled(
    debuggerSessionIDs: DebuggerSessionIDs,
    connectionUptime: number
  ): void;
}