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  1. #include <chrono>
  2. #include <sstream>
  3. #include <iostream>
  4.  
  5. int main()
  6. {
  7. 	using namespace std;
  8. 	using namespace chrono;
  9.  
  10. 	auto const loops_count{1000000};
  11. 	auto const p1{high_resolution_clock::now()};
  12. 	{
  13. 		stringstream ss;
  14. 		for(auto i{loops_count}; 0 != i; i--)
  15. 		{
  16. 			ss.str(string()); // clear
  17. 			ss << 1;
  18. 		}
  19. 	}
  20. 	auto const p2{high_resolution_clock::now()};
  21. 	{
  22. 		for(auto i{loops_count}; 0 != i; i--)
  23. 		{
  24. 			stringstream ss; // recreate
  25. 			ss << 1;
  26. 		}
  27. 	}
  28. 	auto const p3{high_resolution_clock::now()};
  29. 	cout << duration_cast< milliseconds >(p2 - p1).count() << "ms "
  30. 		<< duration_cast< milliseconds >(p3 - p2).count() << "ms" 
  31. 		<< endl;
  32.  
  33.     return 0;
  34. }
  35.  
Success #stdin #stdout 0.46s 16064KB
comments (?)
stdin 
Standard input is empty
stdout 
35ms 431ms
https://ideone.com/Msnv1a
language:
C++14 (gcc 8.3)
created:
7 years ago
visibility:
public

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