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  1. using System;
  2. using static System.Console;
  3. using System.Diagnostics;
  4. using System.Text;
  5.  
  6. public class Program {
  7.     const int Limit = 1000;
  8. 	static int[] dataInt = new int[Limit];
  9. 	static string[] dataString = new string[Limit];
  10.  
  11.     public static void Main() {
  12. 		for (int i = 0; i < Limit; i++) {
  13.             dataInt[i] = i;
  14. 			dataString[i] = i.ToString();
  15.         }
  16.         Time(ConcatenationInt);
  17.         Time(JunctionInt);
  18.         Time(BuilderInt);
  19.         Time(AdditionInt);
  20.         Time(ConcatenationString);
  21.         Time(JunctionString);
  22.         Time(BuilderString);
  23.         Time(AdditionString);
  24.     }
  25.  
  26.     static void Time(Func<int> action) {
  27.         var sw = Stopwatch.StartNew();
  28.         int result = action();
  29.         sw.Stop();
  30. 		WriteLine($"{result} - {sw.ElapsedTicks:000,000,000} - {action.Method.Name}");
  31.         GC.Collect();
  32.         GC.WaitForPendingFinalizers();
  33.     }
  34.  
  35.     static int AdditionInt() {
  36. 		var tmp = "";
  37. 		for (int i = 0; i < Limit; i++) tmp += dataInt[i];
  38. 		return tmp.Length;            
  39.     }
  40.  
  41.     static int AdditionString() {
  42. 		var tmp = "";
  43. 		for (int i = 0; i < Limit; i++) tmp += dataString[i];
  44. 		return tmp.Length;            
  45.     }
  46.  
  47.     static int ConcatenationInt() => string.Concat(dataInt).Length;            
  48.  
  49.     static int ConcatenationString() => string.Concat(dataString).Length;            
  50.  
  51.     static int JunctionInt() => string.Join("", dataInt).Length;            
  52.  
  53.     static int JunctionString() => string.Join("", dataString).Length;            
  54.  
  55.     static int BuilderInt() {
  56. 		var tmp = new StringBuilder();
  57. 		for (int i = 0; i < Limit; i++) tmp.Append(dataInt[i]);
  58. 		return tmp.Length;            
  59.     }
  60.  
  61.     static int BuilderString() {
  62. 		var tmp = new StringBuilder();
  63. 		for (int i = 0; i < Limit; i++) tmp.Append(dataString[i]);
  64. 		return tmp.Length;            
  65.     }
  66. }
  67.  
  68. //https://pt.stackoverflow.com/q/191264/101
Success #stdin #stdout 0.03s 20720KB
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Standard input is empty
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2890 - 000,018,245 - ConcatenationInt
2890 - 000,006,639 - JunctionInt
2890 - 000,004,906 - BuilderInt
2890 - 000,015,904 - AdditionInt
2890 - 000,001,205 - ConcatenationString
2890 - 000,001,097 - JunctionString
2890 - 000,001,253 - BuilderString
2890 - 000,008,370 - AdditionString
https://ideone.com/173LZ2
language:
C# (gmcs 5.20.1)
created:
3 years ago
visibility:
public

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