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void benchmark(int dstalign, int srcalign, size_t size, int times)
{
char *DATA1 = (char*)malloc(size + 64);
char *DATA2 = (char*)malloc(size + 64);
size_t LINEAR1 = ((size_t)DATA1);
size_t LINEAR2 = ((size_t)DATA2);
char *ALIGN1 = (char*)(((64 - (LINEAR1 & 63)) & 63) + LINEAR1);
char *ALIGN2 = (char*)(((64 - (LINEAR2 & 63)) & 63) + LINEAR2);
char *dst = (dstalign)? ALIGN1 : (ALIGN1 + 1);
char *src = (srcalign)? ALIGN2 : (ALIGN2 + 3);
unsigned int t1, t2;
int k;
sleepms(100);
t1 = gettime();
for (k = times; k > 0; k--) {
memcpy(dst, src, size);
}
t1 = gettime() - t1;
sleepms(100);
t2 = gettime();
for (k = times; k > 0; k--) {
memcpy_fast(dst, src, size);
}
t2 = gettime() - t2;
free(DATA1);
free(DATA2);
printf("result(dst %s, src %s): memcpy_fast=%dms memcpy=%d ms\n",
dstalign? "aligned" : "unalign",
srcalign? "aligned" : "unalign", (int)t2, (int)t1);
}
какой бенчмарк )))