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  1. #include <iostream>
  2. #include <chrono>
  3. #include <vector>
  4. #include <stdlib.h>
  5. #include <time.h>
  6.  
  7. class TimeMeasurer
  8. {
  9. public:
  10. 	TimeMeasurer() { start = std::chrono::high_resolution_clock::now(); }
  11. 	~TimeMeasurer()
  12. 	{
  13. 		using namespace std::chrono; 
  14. 		auto stop = high_resolution_clock::now();
  15. 		auto duration = duration_cast<microseconds>(stop - start);
  16. 		std::cout << "tm " << duration.count() << std::endl;
  17. 	};
  18.  
  19. 	TimeMeasurer(const TimeMeasurer&) = delete;
  20. 	TimeMeasurer operator=(const TimeMeasurer&) = delete;
  21. 	TimeMeasurer(TimeMeasurer&&) = delete;
  22. 	TimeMeasurer operator=(TimeMeasurer&&) = delete;
  23.  
  24. private:
  25. 	std::chrono::high_resolution_clock::time_point start;
  26. };
  27.  
  28. std::vector<bool> bvec;
  29. std::vector<char> cvec;
  30.  
  31. int main() {
  32. 	const size_t count = 1000000;
  33.  
  34. 	bvec.reserve(count);
  35. 	cvec.reserve(count);
  36.  
  37. 	for (size_t i = 0; i < count; ++i)
  38. 	{
  39. 		bool value = rand() % 2 == 0;
  40. 		bvec.push_back(value);
  41. 		cvec.push_back(static_cast<char>(value));
  42. 	}
  43.  
  44. 	int sum1 = 0;
  45. 	{
  46. 		TimeMeasurer tm;
  47. 		for (size_t i = 0; i < count; ++i)
  48. 		{
  49. 			sum1 += (bvec[i]) ? 1 : 0;
  50. 		}
  51. 	}
  52. 	std::cout << sum1 << "\n";
  53.  
  54. 	int sum2 = 0;
  55. 	{
  56. 		TimeMeasurer tm;
  57. 		for (size_t i = 0; i < count; ++i)
  58. 		{
  59. 			sum2 += (cvec[i] != 0) ? 1 : 0;
  60. 		}
  61. 	}
  62. 	std::cout << sum2 << "\n";
  63.  
  64. 	return 0;
  65. }
Success #stdin #stdout 0.02s 4480KB
comments (?)
stdin 
Standard input is empty
stdout 
tm 1774
500155
tm 580
500155
https://ideone.com/emNeFj
language:
C++14 (gcc 8.3)
created:
5 years ago
visibility:
public

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