Qt c++ Вычисление времени выполнения функции, программы

QElapsedTimer ta1; ta1.start(); // вычисления Sleep(100); // .......... qDebug() << "elapsed time QElapsedTimer:" << QLocale().toString(ta1.nsecsElapsed()) << "нс";

Ipp32s CPUFreq; ippGetCpuFreqMhz(&CPUFreq); Ipp64u tb1 = ippGetCpuClocks(); // вычисления Sleep(100); // .......... Ipp64u tb2 = ippGetCpuClocks(); qDebug() << "elapsed time ipp:" << QLocale().toString((tb2-tb1)/(Ipp64f)CPUFreq) << "мкс";

auto tc1 = std::chrono::high_resolution_clock::now(); // вычисления Sleep(100); // .......... auto tc2 = std::chrono::high_resolution_clock::now(); qDebug() << "elapsed time std::chrono:" << QLocale().toString(std::chrono::duration_cast<std::chrono::microseconds>(tc2-tc1).count()) << "мкс";

LARGE_INTEGER frequency; QueryPerformanceFrequency(&frequency); LARGE_INTEGER td1; LARGE_INTEGER td2; QueryPerformanceCounter(&td1); // вычисления Sleep(100); // .......... QueryPerformanceCounter (&td2); qDebug() << "elapsed time QueryPerformanceCounter:" << QLocale().toString((double)(td2.QuadPart - td1.QuadPart)/frequency.QuadPart) << "c";

ULONGLONG te1 = GetTickCount64(); // вычисления Sleep(100); // .......... ULONGLONG te2 = GetTickCount64(); qDebug() << "elapsed time GetTickCount64:" << QLocale().toString(te2-te1) << "мс";