步骤一：进入页面之前，执行：
adb shell dumpsys SurfaceFlinger --latency-clear
步骤二：进入页面之后，执行：
adb shell dumpsys SurfaceFlinger --latency
步骤三：数一下步骤二结果中非 0 行的数目，比如下面中有 32 行，即 32 帧，是这样吗？
16666666
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