While working on the DevTools profiler, I've noticed that durations are sometimes incorrect. This seems to be vaguely related to high/low priority state updates. Need to track this down more so I'm filing an issue for myself.
updateQueue: UpdateQueue<any> | null,
  
  memoizedState: any,
  
  firstContextDependency: ContextDependency<mixed> | null,
  
  
  
  
  
  
  mode: TypeOfMode,
  
  effectTag: TypeOfSideEffect,
  
  nextEffect: Fiber | null,
  
  
  
  firstEffect: Fiber | null,
  lastEffect: Fiber | null,
  
  
  expirationTime: ExpirationTime,
  
  childExpirationTime: ExpirationTime,
  
  
  
  alternate: Fiber | null,