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  1. using System;
  2. using System.Diagnostics;
  3. using System.Collections.Generic;
  4. using System.Linq;
  5. using System.Text;
  6.  
  7. namespace ConsoleApplication1 {
  8. 	class Program {
  9. 		static void Main( string[] args ) {
  10. 			Stopwatch watch;
  11.  
  12. 			string a, b, c, d, e, f, g, h;
  13. 			SetString( out a , out  b , out  c , out d , out e , out f , out g , out h );
  14.  
  15. 			int count = 100000;
  16.  
  17. 			for( int loop = 0 ; loop < 4 ; loop++ ) {
  18. 				// +連結
  19. 				watch = Stopwatch.StartNew();
  20. 				string[] s = new string[count];
  21. 				for( int i = 0 ; i < count ; i++ ) {
  22. 					s[i] = a + b + c + d + e + f + g + h;
  23. 				}
  24. 				watch.Stop();
  25. 				Console.WriteLine( "+:" + watch.ElapsedMilliseconds );
  26.  
  27. 				// StringBuilder連結
  28. 				watch = Stopwatch.StartNew();
  29. 				StringBuilder bulder = new StringBuilder();
  30. 				for( int i = 0 ; i < count ; i++ ) {
  31. 					bulder.Append( a ).Append( b ).Append( c ).Append( d ).Append( e ).Append( f ).Append( g ).Append( h );
  32. 					// このループでは、文字列を追加するのみ。
  33. 				}
  34. 				string ret = bulder.ToString(); // 文字列操作を終えてから文字列(string)を生成する。
  35. 				watch.Stop();
  36. 				Console.WriteLine( "StringBuilder:" + watch.ElapsedMilliseconds );
  37. 			}
  38.  
  39. 			Console.ReadLine();
  40. 		}
  41.  
  42. 		[System.Runtime.CompilerServices.MethodImpl( System.Runtime.CompilerServices.MethodImplOptions.NoInlining )]
  43. 		static void SetString( out string a , out string b , out string c , out string d , out string e , out string f , out string g , out string h ) {
  44. 			a = "AAAAAAAAAAAAAAAAA";
  45. 			b = "BBBBBBBBBBBBBBBBBBBBBBBB";
  46. 			c = "CCCCCCCCCCCCCCCCCCCC";
  47. 			d = "DDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDD";
  48. 			e = "EEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEE";
  49. 			f = "FFFFFFFFFFFFFFFFFFFFFF";
  50. 			g = "GGGGGGGGGGGGGGGGG";
  51. 			h = "HHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHH";
  52. 		}
  53.  
  54. 	}
  55. }
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https://ideone.com/CtEwi
language:
C# (gmcs 5.20.1)
created:
12 years ago
visibility:
public

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