gistfile1.txt

    static int cnt = 0;
    cnt++;
    {
        struct timeval now;
        gettimeofday(&now, NULL);
        uint64_t us0 = 0;
        static uint64_t us1 = 0;
        us0 = (uint64_t)now.tv_sec * 1000000 + (uint64_t)now.tv_usec;
        if (us1 != us0) {
            uint64_t x = us0 - us1;
            if (cnt % 100 == 0) {
                printf("frame: %d\n", x);
            }
            us1 = us0;
        }
        return;
    }