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Scheaven

2021-07-22 21b7b5dc0884254080499ea2136e53041c813ec6

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#pragma once
 
#include <istream>
#include <string>
#include <chrono>
#include "log_util.h"
#include <boost/format.hpp>
 
class Timer
{
    public:
        Timer():beg_(clock_::now()){}
        void reset()
        {
            beg_ = clock_::now();
        }
        double elapsed() const
        {
            return std::chrono::duration_cast<second_>(clock_::now() - beg_).count();
        }
        void out(std::string message="")
        {
            double t = elapsed();
            // std::cout << message << " elasped time:" << t << "ms" << std::endl;
            DEBUG((boost::format("%e lasped time:%f ms")%message %t).str());
            reset();
        }
        // DEBUG((boost::format("nhao%d")%1).str());
 
        double get_duration() const
        {
            return elapsed();
        }
    private:
        using clock_ = std::chrono::high_resolution_clock;
        using second_=std::chrono::duration<double,std::milli>;
        std::chrono::time_point<clock_>beg_;
};