Function startYieldTimer

packages/react-reconciler/src/ReactProfilerTimer.js:113–119

(reason: SuspendedReason)

export let yieldStartTime: number = -1.1; // The time when we yielded to the event loop

export function startYieldTimer(reason: SuspendedReason) {
  if (!enableProfilerTimer || !enableComponentPerformanceTrack) {
    return;
  }
  yieldStartTime = now();
  yieldReason = reason;
}

export function startUpdateTimerByLane(
  lane: Lane,