## 7.白屏/首屏时间计算 ![](https://img.kancloud.cn/9b/2d/9b2da67cb007ec124cb39ef9d7958f96_820x426.png) *** ## 8.代码书写 读写分离 ![](https://img.kancloud.cn/57/d6/57d64d3503d392535f825d9fac3b8d55_673x437.png)