Function updateProfiler

packages/react-reconciler/src/ReactFiberBeginWork.js:1356–1380

(
  current: Fiber | null,
  workInProgress: Fiber,
  renderLanes: Lanes,
)

}

function updateProfiler(
  current: Fiber | null,
  workInProgress: Fiber,
  renderLanes: Lanes,
) {
  if (enableProfilerTimer) {
    workInProgress.flags |= Update;

    if (enableProfilerCommitHooks) {
      // Schedule a passive effect for this Profiler to call onPostCommit hooks.
      // This effect should be scheduled even if there is no onPostCommit callback for this Profiler,
      // because the effect is also where times bubble to parent Profilers.
      workInProgress.flags |= Passive;
      // Reset effect durations for the next eventual effect phase.
      // These are reset during render to allow the DevTools commit hook a chance to read them,
      const stateNode = workInProgress.stateNode;
      stateNode.effectDuration = -0;
      stateNode.passiveEffectDuration = -0;
    }
  }
  const nextProps: ProfilerProps = workInProgress.pendingProps;
  const nextChildren = nextProps.children;
  reconcileChildren(current, workInProgress, nextChildren, renderLanes);
  return workInProgress.child;
}

function markRef(current: Fiber | null, workInProgress: Fiber) {
  // TODO: Check props.ref instead of fiber.ref when enableRefAsProp is on.