FloatBuffer performance testing on arrays

import java.nio.ByteBuffer;
import java.nio.FloatBuffer;

public class Test {

    public static void main(String[] args) {
        float[] data = { 1, 2, 3, 4, 5, 6, 7, 8, 9, 10 };
        FloatBuffer buffer = ByteBuffer.allocateDirect(data.length * Float.BYTES).asFloatBuffer();

        long start;

        // test 1: flip()
        start = preTime("Entire array, flip()");
        {
            buffer.put(data).flip();
        }
        postTime(start, buffer);
        buffer.clear();

        // test 2: no flip()
        start = preTime("Entire array, no flip()");
        {
            buffer.put(data);
        }
        postTime(start, buffer);
        buffer.clear();

        // test 3: put() with flip()
        start = preTime("Loop through, with put() and flip()");
        {
            for(int i = 0; i < data.length; i++) {
                buffer.put(data[i]);
            }
            buffer.flip();
        }
        postTime(start, buffer);
        buffer.clear();

        // test 3: put() with index, w/o flip()
        start = preTime("Loop through, with put() at index");
        {
            for(int i = 0; i < data.length; i++) {
                buffer.put(i, data[i]);
            }
        }
        postTime(start, buffer);
        buffer.clear();

        // test 5: position(0)
        start = preTime("Entire array, position(0)");
        {
            buffer.put(data).position(0);
        }
        postTime(start, buffer);
        buffer.clear();
    }

    private static long preTime(String label) {
        System.out.print(label+ ": ");
        return System.nanoTime();
    }

    private static void postTime(long start, FloatBuffer buffer) {
        long ns = System.nanoTime() - start;
        System.out.println("took " + ns + "ns: position = " + buffer.position());
    }

}