在C ++中获得准确的执行时间（微秒） [英] Getting an accurate execution time in C++ (micro seconds)

问题描述

我想获得一个精确的执行时间在微秒的我用C ++实现的程序。
我试图获得与clock_t的执行时间，但它不准确。

I want to get an accurate execution time in micro seconds of my program implemented with C++. I have tried to get the execution time with clock_t but it's not accurate.

推荐答案

如果使用c ++ 11或更高版本，您可以使用 std :: chrono :: high_resolution_clock 。

If you are using c++11 or later you could use std::chrono::high_resolution_clock.

一个简单的用例：

auto start = std::chrono::high_resolution_clock::now();
...
auto elapsed = std::chrono::high_resolution_clock::now() - start;

long long microseconds = std::chrono::duration_cast<std::chrono::microseconds>(elapsed).count();

此解决方案具有可移植的优点。

This solution has the advantage of being portable.

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