1 /* Bitcoin does a lot of SHA of SHA. Benchmark that. */
2 #include <ccan/crypto/sha256/sha256.h>
3 #include <ccan/time/time.h>
6 int main(int argc, char *argv[])
13 n = atoi(argv[1] ? argv[1] : "1000000");
14 sha256(&h, &n, sizeof(n));
16 for (i = 0; i < n; i++)
17 sha256(&h, &h, sizeof(h));
18 diff = time_divide(time_between(time_now(), start), n);
19 printf("Hashing time for %02x%02x%02x%02x%02x%02x... is %llu nsec\n",
20 h.u.u8[0], h.u.u8[1], h.u.u8[2], h.u.u8[3], h.u.u8[4], h.u.u8[5],
21 (unsigned long long)time_to_nsec(diff));