babench.java

public class babench {
    public static void microbench() {
        byte[] ba = new byte[100000000];
        long start = System.currentTimeMillis();
        for (int i = 0; i < 80000000; i++) {
            synchronized (ba) {
                ba[i] = 0;
            }
        }
        System.out.println("took " + (System.currentTimeMillis() - start) + " ms");
    }

    public static void main(String args[]) {
        for (int i = 0; i < 10; i++) {
            microbench();
        }
    }
}

/*

took 417 ms
took 414 ms
took 409 ms
took 409 ms
took 409 ms
took 410 ms
took 409 ms
took 411 ms
took 410 ms
took 411 ms

*/