double Millesecond() { LARGE_INTEGER frequency; LARGE_INTEGER timeStart; QueryPerformanceFrequency(&frequency); // 返回每秒,cpu 所使用的时钟数 QueryPerformanceCounter(&timeStart); double dfrequency = (double)frequency.QuadPart; double dtimeStart = (double)timeStart.QuadPart; return dtimeStart * 1000.0f / dfrequency; }