Release 版比 Debug 快近100倍(Vc.net2003),开销在哪里

 #include "stdafx.h"

#include "windows.h"

#include "time.h"

#include <vector>

#include <list>

struct Point

{

    int x;

    int y;

};

int _tmain(int argc, _TCHAR* argv[])

{

    Point p= {0,0};

    int count = 1000000;

    std::vector< Point > points;

    points.resize(count);

   

    LARGE_INTEGER s;

    LARGE_INTEGER e,f;

    QueryPerformanceCounter(&s);

    for ( int cnt = 0; cnt < count; cnt++ )

    {

        points[cnt] = p;

    }

    QueryPerformanceCounter(&e);

    QueryPerformanceFrequency(&f);

 

    LONGLONG x = e.QuadPart-s.QuadPart;

    double d = double(x)/f.QuadPart;

    std::cout<<d<<std::endl;

    return 0;

}