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默认判定卡顿的阀值为什么是500ms而不是16ms呢？ #124

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GeminiWy opened this issue Dec 11, 2018 · 1 comment
Open

默认判定卡顿的阀值为什么是500ms而不是16ms呢？ #124

GeminiWy opened this issue Dec 11, 2018 · 1 comment

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@GeminiWy
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看了原理：在主线程处理消息的前后记录时间，算出差值，与阀值进行比较从而判断卡顿
疑问：主线程处理消息时间差值为什么能判断卡顿呢？如果我的理解没错的话，主线程16ms一次接收到垂直信号，然后进行下一帧画面的绘制。那么这个绘制的消息的处理时间不应该不超过16ms吗？（不影响到下一次接收信号）
@xs617
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xs617 commented Feb 21, 2019

16ms这个只是给measure，layout，draw的时间，实际上这个库计算的是message在messageQueue中取出来后执行的时间，因为android的ui线程也是走的这种事件驱动，所以就能用来判断ui线程上的阻塞事件

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@xs617 @GeminiWy