@wpzz 是这里吧，filber 并发更新。

// If a render is in progress, and we receive an update from a concurrent event,
// we wait until the current render is over (either finished or interrupted)
// before adding it to the fiber/hook queue. Push to this array so we can
// access the queue, fiber, update, et al later.
const concurrentQueues: Array<any> = [];
let concurrentQueuesIndex = 0;

let concurrentlyUpdatedLanes: Lanes = NoLanes;


而且开发模式下不太准， 源码中有很多地方判断了__DEV__