Cheap Java SHA1 Digest speed test

DigestTest.java

public class DigestTest
{
    @Test
    public void test() {
        String sql = "SELECT count(ZDeviceLite.device_id) FROM device ZDeviceLite";

        // This variable is meaningless and only used for benchmarking, to prevent the
        // JVM from optimizing away the loops below due to non-use of the returned types.
        int hash = 0;

        // Warm-up the JIT (default C2 compile threshold is 10000 code path executions)
        for (int i = 0; i < 20000; i++) {
            hash ^= getSha1Digest().digest(sql.getBytes()).hashCode();
        }

        // Run cheap timed test of 1000 iterations 
        long start = System.nanoTime();
        for (int i = 0; i < 1000; i++) {
            hash ^= getSha1Digest().digest(sql.getBytes()).hashCode();
        }

        System.out.printf("Hash: %d\nTotal ns: %d\n", hash, (System.nanoTime() - start));
    }

    private MessageDigest getSha1Digest() {
        try {
            return MessageDigest.getInstance("SHA-1");
        } catch (final NoSuchAlgorithmException e) {
            throw new IllegalArgumentException(e);
        }
    }
}

Result: 1000 SHA1 computations in 1714058ns (1.7ms).