Incorrect use of traceview test method time and system. currenttimemillis ()

Source: Internet
Author: User

I wrote a demo and used traceview to test the print () method. The last time shown is only 180 ms. Use System before and after the print () method. currenttimemillis () method. The time difference is too long because traceview needs to output the cached information to * at the end of stopmethodtracing *. trace file.

 android.os.Debug.startMethodTracing("MainActivity-print");        long start = System.currentTimeMillis();        print();        android.os.Debug.stopMethodTracing();        long end = System.currentTimeMillis();        Log.i(LOG_TAG, "execute long : " + (end - start));

Traceview test time: 180 ms



Use System. currenttimemillis () for 1105 Ms.

The reason is that

Android. OS. Debug. stopmethodtracing (); During the call, the cached content is output to the external storage file.

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