fork download 
  1. #include <iostream>
  2. #include <fstream>
  3. #include <sstream>
  4. #include <string>
  5. #include <chrono>
  6.  
  7. using namespace std; 
  8. using namespace std::chrono; 
  9.  
  10. // Temp loger 
  11. class Log
  12. {
  13. public:
  14. 	virtual ~Log();
  15. 	std::ostringstream& Get();
  16. protected:
  17. 	std::ostringstream os;
  18. };
  19. std::ostringstream& Log::Get() { return os; }
  20. Log::~Log()
  21. {
  22. 	ofstream ofs("log1", ios::ate); 
  23. 	ofs << os.str(); 
  24. }
  25.  
  26. // perm logger
  27. class Log2
  28. {
  29. public:
  30. 	Log2();
  31. 	virtual ~Log2();
  32. 	std::ofstream& Get();
  33. protected:
  34. 	std::ofstream os;
  35. };
  36. std::ofstream& Log2::Get() { return os; }
  37. Log2::~Log2() { }
  38. Log2::Log2() : os("log2") { }
  39.  
  40. int main()
  41. {
  42. 	const int N = 100000;
  43.  
  44. 	time_point<high_resolution_clock> t0 = high_resolution_clock::now(); 
  45. 	{
  46. 		for(int i = 0; i < N; i++)
  47. 			Log().Get() << "Log record " << i << endl;
  48. 	}
  49. 	time_point<high_resolution_clock> t1 = high_resolution_clock::now();
  50. 	{
  51. 		Log2 logger;
  52. 		for(int i = 0; i < N; i++)
  53. 			logger.Get() << "Log record " << i << endl;
  54. 	}
  55. 	time_point<high_resolution_clock> t2 = high_resolution_clock::now();
  56. 	cout << "Temp logger:" << duration_cast<milliseconds>(t1 - t0).count() << " millisecs" << endl; 
  57. 	cout << "Perm logger:" << duration_cast<milliseconds>(t2 - t1).count() << " millisecs" << endl;
  58. 	cin.get(); 
  59. }
Success #stdin #stdout 0.52s 3472KB
comments (?)
stdin 
Standard input is empty
stdout 
Temp logger:510 millisecs
Perm logger:11 millisecs
https://ideone.com/CcnSTE
language:
C++14 (gcc 8.3)
created:
10 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!