c++ - C++中计时的纳秒精度

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Timer function to provide time in nano seconds using C++

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7年前关闭。




C++中有没有办法获得纳秒精度？相当于Java中的纳秒计时器(System.nanotime)。

最佳答案

如果您使用的是Windows / Visual Studio(可能未实现std::chrono，至少在VS2010中未实现)，则可以使用QueryPerformanceCounter和QueryPerformanceFrequency在计时任务上获得最高的准确性:

LARGE_INTEGER freq, counter1, counter2;
QueryPerformanceFrequency(&freq);
QueryPerformanceCounter(&counter1);
task();
QueryPerformanceCounter(&counter2);
long double elapsed = (long double) (counter2.QuadPart - counter1.QuadPart) / (long double) freq.QuadPart;

关于c++ - C++中计时的纳秒精度，我们在Stack Overflow上找到一个类似的问题：https://stackoverflow.com/questions/17567953/