#include<windows.h>

class MvTimer
{
public:
	MvTimer() { QueryPerformanceFrequency(&Freq); restart(); }
	void restart() { QueryPerformanceCounter(&Count1); }
	float time() { QueryPerformanceCounter(&Count2); return (float)((Count2.QuadPart - Count1.QuadPart) / (double)Freq.QuadPart * 1000.0f); }
private:
	LARGE_INTEGER Count1, Count2, Freq;
};