关注性能：反射操作

测试代码
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 1 using system;
 2 using system.collections.generic;
 3 using system.linq;
 4 using system.text;
 5 using system.reflection;
 6
 7 namespace csharpstudy
 8 {
 9     class program
10     {
11         static void main(string[] args)
12         {
13             {
14                 dynamic dynamicobject = new stringbuilder();
15
16                 helper.watch(() =>
17                 {
18                     for (var i = 0; i < 1000000; i++)
19                     {
20                         dynamicobject.append("hello");
21                     }
22                 });
23             }
24
25             {
26                 var appendmethod = typeof(stringbuilder).getmethod("append", new type[] { typeof(string) });
27                 var sb = new stringbuilder();
28
29                 helper.watch(() =>
30                 {
31                     for (var i = 0; i < 1000000; i++)
32                     {
33                         appendmethod.invoke(sb, new object[] { "hello" });
34                     }
35                 });
36             }
37
38             {
39                 var appendmethod = typeof(stringbuilder).getmethod("append", new type[] { typeof(string) });
40                 var sb = new stringbuilder();
41                 var appendaction = (func<string, stringbuilder>)delegate.createdelegate(typeof(func<string, stringbuilder>), sb, appendmethod);
42
43                 helper.watch(() =>
44                 {
45                     for (var i = 0; i < 1000000; i++)
46                     {
47                         appendaction("hello");
48                     }
49                 });
50             }
51         }
52     }
53

 

 
 

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