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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 = 100000;
  19.       string[] s = new string[count];
  20.       int test = 20;
  21.  
  22.       for (int loop = 0; loop < 4; loop++)
  23.       {
  24.         watch = Stopwatch.StartNew();
  25.         for (int i = 0; i < count; i++)
  26.         {
  27.           for (int j = 0; j < test; ++j)
  28.           {
  29.             s[i] = a + b + c + d + e + f + g + h;
  30.           }
  31.         }
  32.         watch.Stop();
  33.         Console.WriteLine("+:" + watch.ElapsedMilliseconds);
  34.  
  35.         watch = Stopwatch.StartNew();
  36.         for (int i = 0; i < count; i++)
  37.         {
  38.           StringBuilder bulder = new StringBuilder();
  39.           for (int j = 0; j < test; ++j)
  40.           {
  41.             s[i] = bulder.Append(a).Append(b).Append(c).Append(d).Append(e).Append(f).Append(g).Append(h).ToString();
  42.             bulder.Clear();
  43.           }
  44.         }
  45.         watch.Stop();
  46.         Console.WriteLine("StringBuilder:" + watch.ElapsedMilliseconds);
  47.       }
  48.     }
  49.  
  50.     [System.Runtime.CompilerServices.MethodImpl(System.Runtime.CompilerServices.MethodImplOptions.NoInlining)]
  51.     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)
  52.     {
  53.       a = "AAAAAAAAAAAAAAAAA";
  54.       b = "BBBBBBBBBBBBBBBBBBBBBBBB";
  55.       c = "CCCCCCCCCCCCCCCCCCCC";
  56.       d = "DDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDD";
  57.       e = "EEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEE";
  58.       f = "FFFFFFFFFFFFFFFFFFFFFF";
  59.       g = "GGGGGGGGGGGGGGGGG";
  60.       h = "HHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHH";
  61.     }
  62.  
  63.   }
  64. }
  65.  
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https://ideone.com/p4kYx
language:
C# (gmcs 5.20.1)
created:
12 years ago
visibility:
public

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