mono/benchmark/valuetype-hash-equals.cs

   1 using System;
   2
   3 public class ValueType1
   4 {
   5         static int Main ()
   6         {
   7                 Blah a = new Blah ("abc", 1);
   8                 Blah b = new Blah ("ab" + 'c', 1);
   9                 long start, end;
  10                 start = Environment.TickCount;
  11
  12                 start = Environment.TickCount;
  13                 for (int i = 0; i < 1000000; i++)
  14                         a.GetHashCode ();
  15                 end = Environment.TickCount;
  16                 Console.WriteLine ("struct common GetHashCode(): {0}", end-start);
  17
  18                 start = Environment.TickCount;
  19                 for (int i = 0; i < 1000000; i++)
  20                         a.Equals (b);
  21                 end = Environment.TickCount;
  22                 Console.WriteLine ("struct common Equals(): {0}", end-start);
  23
  24                 Blah2 a2 = new Blah2 ("abc", 1);
  25                 Blah2 b2 = new Blah2 ("abc", 1);
  26                 start = Environment.TickCount;
  27                 for (int i = 0; i < 1000000; i++)
  28                         a2.GetHashCode ();
  29                 end = Environment.TickCount;
  30                 Console.WriteLine ("struct specific GetHashCode(): {0}", end-start);
  31
  32                 start = Environment.TickCount;
  33                 for (int i = 0; i < 1000000; i++)
  34                         a2.Equals (b2);
  35                 end = Environment.TickCount;
  36                 Console.WriteLine ("struct specific Equals(): {0}", end-start);
  37
  38                 return 0;
  39         }
  40
  41         struct Blah
  42         {
  43                 public string s;
  44                 public int i;
  45
  46                 public Blah (string s, int k)
  47                 {
  48                         this.s = s;
  49                         i = k;
  50                 }
  51         }
  52
  53         struct Blah2
  54         {
  55                 public string s;
  56                 public int i;
  57
  58                 public Blah2 (string s, int k)
  59                 {
  60                         this.s = s;
  61                         i = k;
  62                 }
  63
  64                 public override int GetHashCode () {
  65                         return i ^ s.GetHashCode ();
  66                 }
  67                 public override bool Equals (object obj) {
  68                         if (obj == null || !(obj is Blah2))
  69                                 return false;
  70                         Blah2 b = (Blah2)obj;
  71                         return b.s == this.s && b.i == this.i;
  72                 }
  73         }
  74 }
  75