【C++】【STL】利用chromo来测量程序运行时间与日志时间打印精确到微秒

2019独角兽企业重金招聘Python工程师标准>>>

直接上代码吧，没啥好说的。头疼。

#include 
#include 
#include 
#include 
#include 
#include 
#include 

using namespace std;

class LogTime {
public:
	LogTime() {}
	~LogTime() {}
	inline void Start() { this->start = std::chrono::system_clock::now(); }
	inline void End() { this->end = std::chrono::system_clock::now(); }

	std::string GetRunTime() {
		auto us_duration = std::chrono::duration_cast(this->end - this->start);
		auto ms_duration = std::chrono::duration_cast(this->end - this->start);
		unsigned long ms = ms_duration.count();
		unsigned long us = us_duration.count();
		std::stringstream ss;
		ss << ms << " ms," << us << " us .";
		return ss.str();
	}

	std::string Now() {
		auto now = std::chrono::system_clock::now();
		auto m = now.time_since_epoch();
		auto diff = std::chrono::duration_cast(m).count(); //当前时间显示到微秒
		auto const ms = diff % 1000000;
		//auto diff = std::chrono::duration_cast(m).count(); //当前时间显示到毫秒
		//auto const ms = diff % 1000;

		std::stringstream ss;
		std::time_t t = std::chrono::system_clock::to_time_t(now);
		ss << std::put_time(std::localtime(&t), "%Y-%m-%d %H.%M.%S") << "." << ms;
		return ss.str();
	}
private:
	std::chrono::system_clock::time_point start;
	std::chrono::system_clock::time_point end;
};

 

转载于:https://my.oschina.net/u/3800567/blog/1834817