Timer Snippet - OOTB

ootb_timer.hpp

#include <iostream>
#include <string>

#include <chrono>
using Clock  = std::chrono::high_resolution_clock;

class Timer {
    
public:
  Timer(std::string const & msg = "") : m_msg(msg), m_iTime(Clock::now()) {}
  
  ~Timer() {
      std::cout << "[" 
        << std::chrono::duration<double>(Clock::now() - m_iTime).count() 
        << "s] " << m_msg << '\n';
  }
  
private:
  std::string m_msg;
  Clock::time_point m_iTime;
};