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.
tag: TypeOfWork,
  
  key: null | string,
  
  type: any,
  
  stateNode: any,
  
  
  
  
  
  
  
  
  return: Fiber | null,
  
  child: Fiber | null,
  sibling: Fiber | null,
  index: number,
  
  
  ref: null | (((handle: mixed) => void) & {_stringRef: ?string}) | RefObject,
  
  pendingProps: any, 
  memoizedProps: any,