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  1. using System;
  2. using System.Linq;
  3. using System.Text.RegularExpressions;
  4. using System.Diagnostics;
  5.  
  6. public class Test
  7. {
  8.     public static void Main()
  9.     {
  10.     	var sw = new Stopwatch();
  11.     	string s;
  12.  
  13.     	const int n = 20;
  14.  
  15. 		sw.Restart();
  16.         s = "string";
  17.         for (int q=0; q<n; ++q) s = Regex.Replace(s, "(.)(?=.)", "$1 ");
  18.         sw.Stop();
  19.         Console.WriteLine("{0} {1}", s.GetHashCode(), sw.ElapsedMilliseconds);
  20.         GC.Collect();
  21.  
  22. 		sw.Restart();
  23.         s = "string";
  24.         for (int q=0; q<n; ++q) s = String.Join(" ", s.AsEnumerable());
  25.         sw.Stop();
  26.         Console.WriteLine("{0} {1}", s.GetHashCode(), sw.ElapsedMilliseconds);
  27.         GC.Collect();
  28.  
  29. 		sw.Restart();
  30.         s = "string";
  31.         for (int q=0; q<n; ++q) s = String.Join(" ", s.ToCharArray());
  32.         sw.Stop();
  33.         Console.WriteLine("{0} {1}", s.GetHashCode(), sw.ElapsedMilliseconds);
  34.         GC.Collect();
  35.     }
  36. }
Success #stdin #stdout 3.34s 134720KB
comments (?)
stdin 
Standard input is empty
stdout 
539801481 2544
539801481 374
539801481 408
https://ideone.com/2Kkz0y
language:
C# (gmcs 5.20.1)
created:
8 years ago
visibility:
public

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