¿Cómo mostrar por pantalla el tiempo transcurrido en unity?

// Example program
#include <iostream>
#include <string>
#include <chrono>

//https://stackoverflow.com/questions/22387586/measuring-execution-time-of-a-function-in-c 

int main()
{
  std::chrono::time_point<std::chrono::system_clock> start, end;
  start = std::chrono::system_clock::now();
  // do something
  end = std::chrono::system_clock::now();

  std::chrono::duration<double> elapsed_seconds = end-start;
  std::time_t end_time = std::chrono::system_clock::to_time_t(end);

  std::cout << "finished computation at " << std::ctime(&end_time)
            << "elapsed time: " << elapsed_seconds.count() << "s\n";
}