blob: 2f9950afb24de014be968460e996d553375f2456 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
|
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <strings.h>
#include "vatoi.hh"
#include "Timer.hh"
int main(int argc,char *argv[]){
// compare speed of bcopy to character loop
if(argc<2){
puts("need to define buffer length");
exit(0);
}
long size = vatoi(argv[1]);
int ntimes = 1;
register int n;
register long i;
if(argc>2)
ntimes = vatoi(argv[2]);
printf("Buffer is %lu bytes %u times\n",size,ntimes);
Timer t1,t2;
char *dst = new char[size];
char *src = new char[size];
// prime the caches
for(i=0;i<size;i++){
src[i]=(char)(i%255);
dst[i]=0;
}
t1.start();
for(n=0;n<ntimes;n++)
for(i=0;i<size;i++)
dst[i]=src[i];
t1.stop();
t2.start();
for(n=0;n<ntimes;n++)
bcopy(src,dst,size);
t2.stop();
t1.print("Std copy timing: ");
t2.print("bcopy timing: ");
delete src;
delete dst;
return 1;
}
|
