[Java] scrypt collision test

scryptcollision.java

int period = (int) 1e4, size = (int) 1e5, period2int = (int) 1e7;
String[] arr = new String[size];

long tmp = System.nanoTime(), start = System.nanoTime(), gen
        = System.nanoTime();
for (int i = 0; i < arr.length; i++) {
    arr[i]
            = Hex.toHexString(SCrypt.generate("asd".getBytes("UTF-8"),
                    GPCrypto.randomGen(256), (int) Math.pow(2, 1), 1, 1, 32));
    if (i
            % period == 0) {
        System.out.println((i / period) + "/" + size / period
                + " in " + ((System.nanoTime() - tmp) / 1e9) + " s");
        tmp
                = System.nanoTime();
    }
}

System.out.println(size / period + "/" + size / period + " in "
        + ((System.nanoTime() - tmp) / 1e9) + " s");
System.out.println("done generating " + arr.length + " keys in " + (System.nanoTime() - gen)
        / 1e9 + " s");
tmp = System.nanoTime();

long search = System.nanoTime();
BigInteger cnt = new BigInteger("0"), one = new BigInteger("1"), period2 = new BigInteger(Integer.toString(period2int)), zero = new BigInteger("0");
for (int i = 0; i < arr.length; i++) {
    for (int j = i + 1; j
            < arr.length; j++) {
        cnt = cnt.add(one);
        if (cnt.mod(period2).equals(zero)) {
            System.out.println(cnt.divide(period2) + "/" + Math.pow(size, 2)
                    / period2.intValue() / 2 + " in " + ((System.nanoTime() - tmp) / 1e9)
                    + " s");
            tmp = System.nanoTime();
        }
        if (arr[i].equals(arr[j])) {
            System.out.println("found match between " + i + " and " + j);
        }
    }
}
System.out.println(Math.pow(size, 2) / period2.intValue() / 2 + "/"
        + Math.pow(size, 2) / period2.intValue() / 2 + " in "
        + ((System.nanoTime() - tmp) / 1e9) + " s");

System.out.println("done searching through " + cnt + " keys in "
        + (System.nanoTime() - search) / 1e9 + " s");
System.out.println(
        "done scrubing in " + (System.nanoTime() - start) / 1e9 + " s");