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  1. using System;
  2. using System.Diagnostics;
  3. using System.Linq;
  4. using System.Collections.Generic;
  5. public class Test
  6. {
  7. 	public static void Main()
  8. 	{
  9. 	        string[] vals = Enumerable.Range(0, 1000000).Select(n => n.ToString()).ToArray();
  10.             string[] res = new string[1000000];
  11.  
  12. 	    	var watch = Stopwatch.StartNew();
  13.             for(int i = 0; i < vals.Length; i++) {
  14.                 res[i] = string.Format("({0})", vals[i]);
  15.             }
  16.  
  17. 	    	Console.WriteLine ("it took {0} ms for string.Format", watch.ElapsedMilliseconds);
  18.  
  19. 	    	watch = Stopwatch.StartNew();	
  20. 	    	for (int i = 0; i < vals.Length; i++)
  21. 	    	{
  22. 	    		res[i] = "(" + vals[i]  + ")";
  23. 	    	}
  24. 	    	Console.WriteLine ("it took {0} ms for " +"\'(\' + vals[i]  +\')\';", watch.ElapsedMilliseconds);
  25.  
  26.             watch = Stopwatch.StartNew();
  27.             char[] data = new char[100];
  28.             data[0] = '(';
  29.             for(int i = 0; i < vals.Length; i++)
  30.             {
  31.                 var str = vals[i];
  32.                 var len = str.Length;
  33.                 str.CopyTo(0, data, 1, len);
  34.                 data[len + 1] = ')';
  35.                 res[i] = new String(data, 0, len + 2);
  36.             }
  37.  
  38.             Console.WriteLine ("it took {0} ms for fancy", watch.ElapsedMilliseconds);
  39. 	}
  40. }
Success #stdin #stdout 1.38s 157696KB
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it took 590 ms for string.Format
it took 177 ms for '(' + vals[i]  +')';
it took 181 ms for fancy


	

		
	 
	
	
			

					
			
			
			
			
			
			
			
			

			
			
			
		

	
		
		

			

			                        







			
			

				

	
					
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language:

						
C# (gmcs 5.20.1)

					

					

						
created:
								
						
10 years ago

					

					

						
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