👨🏻‍🏫 借助本次LMS性能优化的机会，结合实际代码，找到项目中存在的无效render的case，提升对react 和性能优化的理解

定位手段

react-devtools
ahooks提供的 useWhyDidYouUpdate / useTrackedEffect

理论知识

结合实际项目，总结的几个高频Tips

1. 如果只依赖基础变量，建议在 useSelector 内部解构，避免因为对象内其他属性变更导致非必要的update。

useSelector compares its results using strict === reference comparisons, so the component will re-render any time the selector result is a new reference! This means that if you create a new reference in your selector and return it, your component could re-render every time an action has been dispatched, even if the data really isn't different.

Bad

Good