Timer.cpp

#include <chrono>
#include <iostream>
#include <thread>

class Timer {
 private:
  std::chrono::time_point<std::chrono::high_resolution_clock> mStart;

 public:
  Timer() { mStart = std::chrono::high_resolution_clock::now(); }
  ~Timer() { stop(); }
  void stop() {
    auto end = std::chrono::high_resolution_clock::now();

    auto start = std::chrono::time_point_cast<std::chrono::microseconds>(mStart)
                     .time_since_epoch()
                     .count();
    auto stop = std::chrono::time_point_cast<std::chrono::microseconds>(end)
                    .time_since_epoch()
                    .count();

    auto duration = stop - start;
    std::cout << duration * 0.001 << " ms\n";
  }
};

using namespace std::literals::chrono_literals;

int main()
{
    {
        auto t = Timer();
        std::this_thread::sleep_for(1s);
    }

    return 0;
}