#include <iostream>
#include <chrono>
#include <cstdlib>
 
int main()
{
 auto t1 = std::chrono::high_resolution_clock::now();
 
 for(int i=0; i<10000; i++)
  system("echo hello");
 
 auto t2 = std::chrono::high_resolution_clock::now();
 
 auto t3 = std::chrono::high_resolution_clock::now();
 
 for(int i=0; i<10000; i++)
  std::cout << "hello" << std::endl;
 
 auto t4 = std::chrono::high_resolution_clock::now();
 
 auto span = std::chrono::duration_cast<std::chrono::duration<double>>(t2 - t1);
 
 std::cout << "It took " << span.count() << "seconds to print text using echo" << std::endl;
 
 auto span2 = std::chrono::duration_cast<std::chrono::duration<double>>(t4 - t3);
 
 std::cout << "It took " << span2.count() << "seconds to print text using cout" << std::endl;
 
 return 0;
}