import java.lang.reflect.Method;
import java.util.Random;

public class Comparison
{
    private static final int LOOPS = 5000000;
    public static void main(String[] args) throws Exception
    {
        Method m = Test.class.getDeclaredMethods()[0];
        Test inst = new Test();
        TestBounce bounce = new TestBounce(inst);
        for (int z = 0; z < 10; z++)
        {
            int test = (new Random()).nextInt();
            Stopwatch sw = new Stopwatch();
            sw.start();
            for (int x = 0; x < LOOPS; x++) m.invoke(inst, test);
            sw.stop();
            long ref = sw.length();
            sw.start();
            for (int x = 0; x < LOOPS; x++) bounce.bounce(test);
            sw.stop();
            if (z > 9) //Drops the first few till java gets stabilized and optimized
                System.out.println(String.format("Ref: %dns Bounce: %dns Factor: %f", ref, sw.length(), (ref / (float)sw.length())));
        }
    }

    private static class Test
    {
        public int ret(int a)
        {
            return a;
        }
    }

    private static class TestBounce
    {
        Test instance;
        public TestBounce(Test inst)
        {
            instance = inst;
        }
        public int bounce(int a)
        {
            return instance.ret(a);
        }
    }

    private static class Stopwatch
    {
        public void start(){
            if (fIsRunning) throw new IllegalStateException("Must stop before calling start again.");
            fStart = System.nanoTime();
            fStop = 0;
            fIsRunning = true;
        }
        public void stop() {
            if (!fIsRunning) throw new IllegalStateException("Cannot stop if not currently running.");
            fStop = System.nanoTime();
            fIsRunning = false;
        }

        public String toString(){ return (fStop - fStart) + " ns"; }
        public long length() { return fStop - fStart; }
        private long fStart;
        private long fStop;
        private boolean fIsRunning;
    }

}

Ref: 2133065816ns Bounce: 340ns Factor: 6273723.000000
Ref: 2191885129ns Bounce: 4417ns Factor: 496238.406250
Ref: 1918747654ns Bounce: 4417ns Factor: 434400.656250
Ref: 2001886097ns Bounce: 340ns Factor: 5887900.000000
Ref: 2098847310ns Bounce: 340ns Factor: 6173080.500000
Ref: 2042958566ns Bounce: 340ns Factor: 6008701.500000
Ref: 2032499240ns Bounce: 680ns Factor: 2988969.500000
Ref: 2213895821ns Bounce: 340ns Factor: 6511458.500000
Ref: 2075877429ns Bounce: 339ns Factor: 6123532.000000
Ref: 2163176430ns Bounce: 339ns Factor: 6381051.500000