How can i benchmark method execution time in java?

Question

I have a program which i have myself written in java, but I want to test method execution times and get timings for specific methods. I was wondering if this is possible, by maybe somehow an eclipse plug-in? or maybe inserting some code?

I see, it is quite a small program, nothing more than 1500 lines, which would be better a dedicated tool or System.currentTimeMillis()?

Answer 1

Other than using a profiler, a simple way of getting what you want is the following:

public class SomeClass{    public void somePublicMethod()    {        long startTime = System.currentTimeMillis();        someMethodWhichYouWantToProfile();        long endTime = System.currentTimeMillis();        System.out.println("Total execution time: " + (endTime-startTime) + "ms");     }  }