wrapper to measure of time execution

measure.hpp

/**
  usage:  std::cout << measure<>::execution(functor(dummy)) << std::endl
*/
template <typename TimeT = std::chrono::nanoseconds> struct measure {
  template <typename F, typename... Args>
  static typename TimeT::rep execution(F func, Args &&... args) {
    auto start = std::chrono::steady_clock::now();
    func(std::forward<Args>(args)...);
    auto duration = std::chrono::duration_cast<TimeT>(
        std::chrono::steady_clock::now() - start);
    return duration.count();
  }
};