static getMainThreadTopLevelEventDurations()

in src/sdk/lh-trace-processor.ts [386:422]

• 32 lines of code
• 5 McCabe index (conditional complexity)

  static getMainThreadTopLevelEventDurations(
    topLevelEvents,
    startTime = 0,
    endTime = Infinity
  ) {
    // Find durations of all slices in range of interest.
    /** @type {Array<number>} */
    const durations = [];
    let clippedLength = 0;

    for (const event of topLevelEvents) {
      if (event.end < startTime || event.start > endTime) {
        continue;
      }

      let duration = event.duration;
      let eventStart = event.start;
      if (eventStart < startTime) {
        // Any part of task before window can be discarded.
        eventStart = startTime;
        duration = event.end - startTime;
      }

      if (event.end > endTime) {
        // Any part of task after window must be clipped but accounted for.
        clippedLength = duration - (endTime - eventStart);
      }

      durations.push(duration);
    }
    durations.sort((a, b) => a - b);

    return {
      durations,
      clippedLength,
    };
  }