Wayne and Layne

Java Code Profiling

Here is a very small Java class to help time function calls or sections of code. Of course, it won’t be exactly right on (due to scheduling issues, etc), but it’s pretty good at helping with initial profiling and performance measurements.


public class Stopwatch
{
    private long start;
    private long stop;
    
    public void start()
    {
        // start timing
        start = System.currentTimeMillis();
    }
    
    public void stop()
    {
        // stop timing
        stop = System.currentTimeMillis();
    }
    
    public long elapsedTimeMillis()
    {
        return stop - start;
    }
    
    public String toString()
    {
        // print execution time
        return "elapsedTimeMillis: " + Long.toString(elapsedTimeMillis());
    }
}