Code running time

Question

For some time now I have been using System.nanoTime() in order to measure the time it takes for code to complete. Recently this has become a great disturbance for me. Are there any other ways to measure it?

I am running Java in Eclipse.

@Quincunx It works fine most of the time, but there was that one time it blew up Alderaan. — Christian Ternus, Oct 20 '13 at 23:56
SO consensus seems to be that your current method (using `nanoTime()`) is fine: http://stackoverflow.com/questions/180158 — Daniel F. Thornton, Oct 20 '13 at 23:56

score 0 · Answer 1 · answered Oct 20 '13 at 23:56

0

import java.lang.management.ManagementFactory;
import java.lang.management.ThreadMXBean;    

long time = ManagementFactory.getThreadMXBean().getThreadCpuTime(Thread.currentThread().getId())

JavaDoc

answered Oct 20 '13 at 23:56

Justin Lessard

10,804
5
49
61

score 0 · Answer 2 · answered Oct 21 '13 at 00:01

0

You may want to try StatsD:

https://github.com/youdevise/java-statsd-client

Example from the README:

statsd.recordExecutionTime("bag", 25);

bag is the method you would like to record time.

answered Oct 21 '13 at 00:01

Mingyu

31,751
14
55
60

Justin · Answer 3 · 2013-11-04T07:18:30.107

If you dislike typing it out every time, make a class to time it.

Example (static because I'm very lazy; don't want to instantiate an Object):

public static class CodeTimer{
    static long start;
    public static void start(){
        start = System.nanoTime();
    }
    public static void end(){
        System.out.println(System.nanoTime() - end);
        //could easily change it to print out time in seconds, with some
        //String before it, to return a value, etc.
    }
}

This is exactly the same as the System.nanoTime() method, but now you only need to type CodeTimer.start() at the beginning and CodeTimer.end() at the end.

Code running time

3 Answers3