衡量Android执行时间的最佳方法? [英] Best method to measure execution time in Android?

问题描述

衡量Android代码段执行时间的最佳方法是什么?

What is best method to measure execution time of Android code snippet?

我前后有一段代码，我想放置时间戳以了解其执行时间(例如，在 onCreate()中一个，在 onDestroy()中另一个>活动方法).

I have a section of code before and after which I want to place timestamps to find out it's execution time (e.g. one in onCreate() and another in onDestroy() method of activity).

我已经尝试过 Time.toMillies(false)，但是它只会向我返回秒数(末尾带有恒定的 000 ).我还尝试了两个Java函数: System.currentTimeMillis()和 System.nanoTime().第一个返回纪元时间，以毫秒为单位.

I have tried Time.toMillies(false), but it only returns seconds to me (with constant 000 at the end). I also tried two java functions: System.currentTimeMillis() and System.nanoTime(). First one returns milliseconds of epoch time, second doesn't.

衡量执行时间并获得良好精度的最佳方法是什么?

What would be the best way to measure execution time and get good precision?

推荐答案

TimingLogger 怎么样?

来自 TimingLogger 文档:

TimingLogger timings = new TimingLogger(YOUR_TAG, "methodA");
// ... do some work A ... 
timings.addSplit("work A");
// ... do some work B ... 
timings.addSplit("work B");
// ... do some work C ... 
timings.addSplit("work C");
timings.dumpToLog();

转储将如下所示:

     D/TAG     (3459): methodA: begin
     D/TAG     (3459): methodA:      9 ms, work A
     D/TAG     (3459): methodA:      1 ms, work B
     D/TAG     (3459): methodA:      6 ms, work C
     D/TAG     (3459): methodA: end, 16 ms

不要忘记通过运行以下命令来启用标签: adb shell setprop log.tag.YOUR_TAG VERBOSE

Do not forget to enable your tag by running: adb shell setprop log.tag.YOUR_TAG VERBOSE

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