Function logEvent

packages/scheduler/src/SchedulerProfiling.js:34–57

(entries: Array<number | PriorityLevel>)

const SchedulerResumeEvent = 8;

function logEvent(entries: Array<number | PriorityLevel>) {
  if (eventLog !== null) {
    const offset = eventLogIndex;
    eventLogIndex += entries.length;
    if (eventLogIndex + 1 > eventLogSize) {
      eventLogSize *= 2;
      if (eventLogSize > MAX_EVENT_LOG_SIZE) {
        // Using console['error'] to evade Babel and ESLint
        console['error'](
          "Scheduler Profiling: Event log exceeded maximum size. Don't " +
            'forget to call `stopLoggingProfilingEvents()`.',
        );
        stopLoggingProfilingEvents();
        return;
      }
      const newEventLog = new Int32Array(eventLogSize * 4);
      // $FlowFixMe[incompatible-call] found when upgrading Flow
      newEventLog.set(eventLog);
      eventLogBuffer = newEventLog.buffer;
      eventLog = newEventLog;
    }
    eventLog.set(entries, offset);
  }
}

export function startLoggingProfilingEvents(): void {
  eventLogSize = INITIAL_EVENT_LOG_SIZE;