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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. {
  9.     class Program
  10.     {
  11.         static void Main(string[] args)
  12.         {
  13.             Stopwatch watch;
  14.  
  15.             string a, b, c, d, e, f, g, h;
  16.             SetString(out a, out  b, out  c, out d, out e, out f, out g, out h);
  17.  
  18.             int count = 1000000;
  19.             string[] s = new string[count];
  20.  
  21.             for (int loop = 0; loop < 8; loop++)
  22.             {
  23.                 GC.Collect();
  24.                 watch = Stopwatch.StartNew();
  25.                 for (int i = 0; i < count; i++)
  26.                 {
  27.                     s[i] = a + b + c + d;
  28.                 }
  29.                 watch.Stop();
  30.                 Console.WriteLine("+:" + watch.ElapsedMilliseconds);
  31.  
  32.                 GC.Collect();
  33.                 watch = Stopwatch.StartNew();
  34.                 StringBuilder bulder = new StringBuilder();
  35.                 for (int i = 0; i < count; i++)
  36.                 {
  37.                     bulder.Append(a).Append(b).Append(c).Append(d);
  38.                     s[i] = bulder.ToString();
  39.                     bulder.Clear();
  40.                 }
  41.                 watch.Stop();
  42.                 Console.WriteLine("StringBuilder:" + watch.ElapsedMilliseconds);
  43.             }
  44.         }
  45.  
  46.         [System.Runtime.CompilerServices.MethodImpl(System.Runtime.CompilerServices.MethodImplOptions.NoInlining)]
  47.         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)
  48.         {
  49.             a = "AAAAAAAAAAAAAAAAA";
  50.             b = "BBBBBBBBBBBBBBBBBBBBBBBB";
  51.             c = "CCCCCCCCCCCCCCCCCCCC";
  52.             d = "DDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDD";
  53.             e = "EEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEE";
  54.             f = "FFFFFFFFFFFFFFFFFFFFFF";
  55.             g = "GGGGGGGGGGGGGGGGG";
  56.             h = "HHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHH";
  57.         }
  58.  
  59.     }
  60. }
  61.  
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https://ideone.com/GAbR5
language:
C# (gmcs 5.20.1)
created:
12 years ago
visibility:
public

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