takeTime.cpp

#include <iostream>
#include <chrono>

int main()
{
  std::cout << "Starting computation ..." << std::endl;
  auto start = std::chrono::steady_clock::now();
  // insert code to measure here
  auto end = std::chrono::steady_clock::now();
  auto diff = end - start;
  std::cout << "Time: " << std::chrono::duration <double, std::milli>(diff).count() << " ms" << std::endl;
}