import java.lang.reflect.*;

class Micro {

    public static void main(String[] args)
        throws Exception
    {
        Method method = Micro.class.getDeclaredMethod("test", new Class[] { Integer.TYPE });

        int reps = 10*1000*1000;
        int result = 0;

        {
            System.out.println("Reflection: test(10) x "+reps);
            for(int j=0; j<5; j++) {
                long start = System.currentTimeMillis();

                // call
                Object[] params = new Object[] { new Integer(10) };
                for(int i=0; i<reps; i++) {
                    result = ((Integer)method.invoke(null, params)).intValue();
                }

                long end = System.currentTimeMillis();
                System.out.println("  elapsed time: "+(end-start)+"ms");
                System.gc();
            }
        }

        {
            System.out.println("Reflection: loop in sub-method: test(10) x "+reps);
            for(int j=0; j<5; j++) {
                long start = System.currentTimeMillis();

                // call
                result = test10(method, reps);

                long end = System.currentTimeMillis();
                System.out.println("  elapsed time: "+(end-start)+"ms");
                System.gc();
            }
        }

        {
            System.out.println("Reflection: test(1.."+reps+")");
            for(int j=0; j<5; j++) {
                long start = System.currentTimeMillis();

                // call
                Object[] params = new Object[1];
                for(int i=0; i<reps; i++) {
                    params[0] = new Integer(i);
                    result = ((Integer)method.invoke(null, params)).intValue();
                }

                long end = System.currentTimeMillis();
                System.out.println("  elapsed time: "+(end-start)+"ms");
                System.gc();
            }
        }

        {
            System.out.println("Reflection: loop in sub-method: test(1.."+reps+")");
            for(int j=0; j<5; j++) {
                long start = System.currentTimeMillis();

                // call
                result = test(method, reps);

                long end = System.currentTimeMillis();
                System.out.println("  elapsed time: "+(end-start)+"ms");
                System.gc();
            }
        }

        System.out.println("result: " + result);
    }

    static int test10(Method method, int reps)
        throws Exception
    {
        int result = 0;
        Object[] params = new Object[] { new Integer(10) };
        for(int i=0; i<reps; i++) {
            result = ((Integer)method.invoke(null, params)).intValue();
        }
        return result;
    }

    static int test(int a) {
        return a;
    }

    static int test(Method method, int reps)
        throws Exception
    {
        int result = 0;
        Object[] params = new Object[1];
        for(int i=0; i<reps; i++) {
            params[0] = new Integer(i);
            result = ((Integer)method.invoke(null, params)).intValue();
        }
        return result;
    }
}