ReactFlightPerformanceTrack.js — react Source File

Source Code

/**
 * 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
 */

/* eslint-disable react-internal/no-production-logging */

import type {
  ReactComponentInfo,
  ReactIOInfo,
  ReactAsyncInfo,
} from 'shared/ReactTypes';

import {enableProfilerTimer} from 'shared/ReactFeatureFlags';

import {
  addValueToProperties,
  addObjectToProperties,
} from 'shared/ReactPerformanceTrackProperties';

import {getIODescription} from 'shared/ReactIODescription';

const supportsUserTiming =
  enableProfilerTimer &&
  typeof console !== 'undefined' &&
  typeof console.timeStamp === 'function' &&
  typeof performance !== 'undefined' &&
  // $FlowFixMe[method-unbinding]
  typeof performance.measure === 'function';

const IO_TRACK = 'Server Requests ⚛';
const COMPONENTS_TRACK = 'Server Components ⚛';

export function markAllTracksInOrder() {
  if (supportsUserTiming) {
    // Ensure we create the Server Component track groups earlier than the Client Scheduler
    // and Client Components. We can always add the 0 time slot even if it's in the past.
    // That's still considered for ordering.
    console.timeStamp(
      'Server Requests Track',
      0.001,
      0.001,
      IO_TRACK,
      undefined,
      'primary-light',
    );
    console.timeStamp(
      'Server Components Track',
      0.001,
      0.001,
      'Primary',
      COMPONENTS_TRACK,
      'primary-light',
    );
  }
}
// ... (590 more lines)