gistfile1.txt

#include <openssl/sha.h>
#include <openssl/md5.h>
#include <stdio.h>
#include <sys/time.h>
#include <stdint.h>
#include <memory.h>
#include <unistd.h>

static struct timeval g_timer;

void reset_timer()
{
    gettimeofday(&g_timer, NULL);
}

void show_timer(size_t size_bytes)
{
    struct timeval endtime;
    double sec;
    gettimeofday(&endtime, NULL);
    sec = (endtime.tv_sec - g_timer.tv_sec)
        + (double)(endtime.tv_usec - g_timer.tv_usec) / 1000 / 1000;
    printf("%f sec\n", sec);
    printf("%f MB\n", ((double)size_bytes)/1024/1024);
    printf("%f Mbps\n", ((double)size_bytes)*8/sec/1000/1000);
}

int main(void)
{
    const size_t NUM = 10000000;
    const char data[] = "abcdefghijklmnopqrstuvwxyz";
    reset_timer();
    size_t i;
    //unsigned char buf[MD5_DIGEST_LENGTH];
    unsigned char buf[SHA_DIGEST_LENGTH];
    for(i=0; i < NUM; ++i) {
        //MD5((unsigned const char*)data, sizeof(data), buf);
        SHA1((unsigned const char*)data, sizeof(data), buf);
    }
    show_timer(sizeof(data)*NUM);

    return 0;
}

/**
 * MD5:  3.872002 sec
 * SHA1: 3.857552 sec
 */