MyWikkaSite: timecalculation

Most recent edit on 2009-06-16 18:09:27 by YuKyung

Additions:
sin 과 sqrt 중 어느 것이 빠를 것인가..PC에서..ㅋ
sqrt 가 대략 1.5배 이상 빠른듯..

Edited on 2009-06-16 18:08:46 by YuKyung

Additions:
%%

Edited on 2009-06-16 18:08:38 by YuKyung

Deletions:

 This is a code block

Edited on 2009-06-16 18:08:27 by YuKyung

Additions:

 This is a code block

(c)

Oldest known version of this page was edited on 2009-06-16 18:07:49 by YuKyung []

Page view:

#include <stdio.h>
#include <windows.h>
#include <math.h>

int main()
{

int i = 0;
int ret = 0;
double value = 10.0;

LARGE_INTEGER ticksPerSecond;
LARGE_INTEGER start_ticks, end_ticks, diff_ticks;

QueryPerformanceCounter(&start_ticks);
for( i = 0 ; i < 10000; i)

ret = sqrt(value);

QueryPerformanceCounter(&end_ticks);
QueryPerformanceFrequency(&ticksPerSecond);
diff_ticks.QuadPart = end_ticks.QuadPart- start_ticks.QuadPart;
printf("Elapsed CPU time: %.12f sec\n\n", ((double)diff_ticks.QuadPart/(double)ticksPerSecond.QuadPart));

QueryPerformanceCounter(&start_ticks);
for( i = 0 ; i < 10000; i)

ret = sin(value);

QueryPerformanceCounter(&end_ticks);
QueryPerformanceFrequency(&ticksPerSecond);
diff_ticks.QuadPart = end_ticks.QuadPart- start_ticks.QuadPart;
printf("Elapsed CPU time: %.12f sec\n\n",((double)diff_ticks.QuadPart/(double)ticksPerSecond.QuadPart));

}

MyWikkaSite : timecalculation