public static int stringHash(Client client) {
        String s = buildUniqueString(client);
        if (s == null) {
            return 0;
        }
        return s.hashCode();
    }
@Test
    void performanceTestOfStringHash() {
        long start = System.nanoTime();
        for (int i = 0; i < N; i++) {
            DistroUtils.stringHash(client1);
        }
        System.out.printf("Distro Verify Revision Performance: %.2f ivk/ns\n", ((double) System.nanoTime() - start) / N);
    }