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发现开发版本和体验版本的appLaunch耗时竟然高达4s，而线上版本只有1.5s, 看官方说是因为增加了权限验证以及基础库会增加调试相关的debug代码，所以体验本和开发版本的耗时会高于正式版本，能否在开发版或者体验版本提供比较纯净的口子，或者说把权限检验和debug相关的耗时给出来一个区间，我们大概能计算出来上线后的启动耗时？

firstPaint fcp这些只是给了时间点，如果想要算绝对值 应该如何计算呢？

升级到这个1.05.2111300 | 1.06.2111300版本开发者工具后 定时器清除之后还在运行 回退到1.05.2109101 RC版本 问题解决