react-native/Libraries/Utilities/createPerformanceLogger.d.ts

/**
 * 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.
 *
 * @format
 */

export type Timespan = {
  startTime: number;
  endTime?: number;
  totalTime?: number;
  startExtras?: Extras;
  endExtras?: Extras;
};

// Extra values should be serializable primitives
export type ExtraValue = number | string | boolean;

export type Extras = {[key: string]: ExtraValue};

export interface IPerformanceLogger {
  addTimespan(
    key: string,
    startTime: number,
    endTime: number,
    startExtras?: Extras,
    endExtras?: Extras,
  ): void;
  append(logger: IPerformanceLogger): void;
  clear(): void;
  clearCompleted(): void;
  close(): void;
  currentTimestamp(): number;
  getExtras(): {[key: string]: ExtraValue | null};
  getPoints(): {[key: string]: number | null};
  getPointExtras(): {[key: string]: Extras | null};
  getTimespans(): {[key: string]: Timespan | null};
  hasTimespan(key: string): boolean;
  isClosed(): boolean;
  logEverything(): void;
  markPoint(key: string, timestamp?: number, extras?: Extras): void;
  removeExtra(key: string): ExtraValue | null;
  setExtra(key: string, value: ExtraValue): void;
  startTimespan(key: string, timestamp?: number, extras?: Extras): void;
  stopTimespan(key: string, timestamp?: number, extras?: Extras): void;
}