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RobinCPC/Measuring_Performance.cpp

Last active January 2, 2016 11:29
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Calculate computing time
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Measuring_Performance.cpp
//Measuring performance of function more precisively.
// Include necessary file
#include <windows.h>
// Add code to calculate the computing time of function more precsively
LARGE_INTEGER nFreq;
LARGE_INTEGER nBeginTime;
LARGE_INTEGER nEndTime;
double computing_time;
QueryPerformanceFrequency(&nFreq);
QueryPerformanceCounter(&nBeginTime);
// start counting, add the function you want to measure below
// End counting
QueryPerformanceCounter(&nEndTime);
computing_time = (double) (nEndTime.QuadPart - nBeginTime.QuadPart) / (double)nFreq.QuadPart;
CString time_str;
time_str.Format("Comuting Time: %g us", computing_time*1000*1000); // convect double to CString
AfxMessageBox(time_str); // show message
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