/how-to-convert-stdchronohigh-resolution-clocknow-to-milliseconds-micros int main (int argc, char *argv[]) { std::chrono::time_point< std::chrono::system_clock > now = std::chrono::system_clock::now(); auto duration = now.time_since_epoch(); ...
high_resolution_clock 表示实现提供的拥有最小计次周期的时钟。它可以是 system_clock 或 steady_clock 的别名,也可能是第三个独立时钟。 这三个时钟类有一些共同的成员,如下所示: 每种时钟类都有一个 nownow 静态函数来获取当前时间,返回的类型是由该时钟类下的time_point描述。这是一个std::chrono::time_p...
int main(int argc, char* argv[]) { std::cout << "resolution (nano) = " << (double) std::chrono::high_resolution_clock::period::num / std::chrono::high_resolution_clock::period::den * 1000 * 1000 * 1000 << std::endl; auto t1 = std::chrono::high_resolution_clock::now();...
staticstd::chrono::time_point<std::chrono::high_resolution_clock>now()noexcept; (since C++11) Returns a time point representing the current point in time. Return value A time point representing the current time. Example Run this code
staticstd::chrono::time_point<std::chrono::high_resolution_clock>now()noexcept; (since C++11) Returns a time point representing the current point in time. Parameters (none) Return value A time point representing the current time. Example ...
return std::chrono::duration_cast<T>(std::chrono::high_resolution_clock::now().time_since_epoch()); } template <typename T,std::enable_if_t<!std::chrono::high_resolution_clock::is_steady, T>* = nullptr>static T sample() {
#include<iostream>#include<chrono>intmain(intargc,char**argv){{size_tn=1<<27;std::vector<float>vec(n);typedefstd::chrono::high_resolution_clockClock;autot1=Clock::now();for(size_ti=0;i<vec.size();++i){vec[i]=std::sin(i);}autot2=Clock::now();std::chrono::nanosecondst21=t2-...
classhigh_resolution_clock; (C++11 起) 类std::chrono::high_resolution_clock表示实现提供的拥有最小计次周期的时钟。它可以是std::chrono::system_clock或std::chrono::steady_clock的别名,或第三种独立时钟。 std::chrono::high_resolution_clock满足平凡时钟(TrivialClock)的要求。
high_resolution_clock::period::den * 1000 * 1000 * 1000 << std::endl; auto t1 = std::chrono::high_resolution_clock::now(); std::cout << "how much nanoseconds std::cout takes?" << std::endl; auto t2 = std::chrono::high_resolution_clock::now(); auto diff = t2-t1; ...
多亏了CPU注释，我不能使用high_resolution_clock，因为它不测量时间，但是CPU计时。所以，我发现这个基于...