#ifndef __UTILS__
#define __UTILS__
#include <iostream>
#include <chrono>
namespace utils{


    class hdTimer{
    public:
        hdTimer(){
        }
        void tik(){
             start =  std::chrono::high_resolution_clock::now();
        }
        void tok(){
            end = std::chrono::high_resolution_clock::now();
        }
        double cost(){
            return double( std::chrono::duration_cast<std::chrono::nanoseconds>(end-start).count())/1000000000.0;
        }
    private:

        std::chrono::time_point<std::chrono::steady_clock> start,end;

    };


}


#endif