fork download
copy 
  1. #include <iostream>
  2. #include <chrono>
  3. #include <time.h>
  4. #include <cmath>
  5.  
  6.  
  7. using namespace std;
  8. using namespace std::chrono;
  9.  
  10. template<typename lambda>
  11. double timed_template(lambda &&fnc) {
  12. 	high_resolution_clock::time_point t1 = high_resolution_clock::now();
  13. 	//auto start = chrono::steady_clock::now();
  14. 	fnc(10, 1000000000, 7);
  15. 	high_resolution_clock::time_point t2 = high_resolution_clock::now();
  16.  
  17. 	auto duration = duration_cast<nanoseconds>(t2 - t1).count();
  18. 	//auto end = chrono::steady_clock::now();
  19. 	//auto duration = chrono::duration <double, nano>(end - start).count();
  20. 	return duration;
  21. }
  22.  
  23. int main()
  24. {
  25.  
  26. 	printf("modulo fct:      %f ns\n",
  27. 		timed_template([](int X, int Y, int D) ->int {
  28. 		if ((Y - X) % D == 0)
  29. 			return (Y - X) / D;
  30. 		else
  31. 			return ((Y - X) / D) + 1;
  32. 	})
  33. 		);
  34.  
  35. 	printf("ceil and double: %f ns\n",
  36. 		timed_template([](int X, int Y, int D) ->int {
  37. 		double diff = Y - X;
  38. 		long hop = (long)ceil(diff / D);
  39. 		return hop;
  40. 	})
  41. 		);
  42.  
  43. 	return 0;
  44. }
Success #stdin #stdout 0s 3456KB
comments (?)
stdin
copy 
Standard input is empty
stdout
copy 
modulo fct:      315.000000 ns
ceil and double: 237.000000 ns
https://ideone.com/owdyeN
language:
C++14 (gcc 8.3)
created:
8 years ago
visibility:
public

Share or Embed source code

Discover > Sphere Engine API

The brand new service which powers Ideone!

Discover > IDE Widget

Widget for compiling and running the source code in a web browser!