回答編集履歴
3
修正
answer
CHANGED
|
@@ -98,7 +98,7 @@
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98
98
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private string _StringKey = "1";
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99
99
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100
100
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[Benchmark]
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101
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-
public string
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101
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+
public string UseReflection()
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102
102
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{
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103
103
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var prop = typeof(Message).GetProperty(
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104
104
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"Message" + _StringKey,
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@@ -125,7 +125,7 @@
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125
125
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（計測結果）
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126
126
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| Method | Mean | Error | StdDev | Median | Allocated |
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127
127
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|-------------- |------------:|-----------:|----------:|------------:|----------:|
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128
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-
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128
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+
| UseReflection | 202.8417 ns | 13.9314 ns | 0.7636 ns | 203.0229 ns | 48 B |
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129
129
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| UseArray | 0.0055 ns | 0.1723 ns | 0.0094 ns | 0.0000 ns | - |
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130
130
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| UseDictionary | 47.3129 ns | 9.5924 ns | 0.5258 ns | 47.3259 ns | 48 B |
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131
131
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```
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2
修正
answer
CHANGED
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@@ -116,7 +116,6 @@
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116
116
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117
117
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class Program
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118
118
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{
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119
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-
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120
119
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static void Main()
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121
120
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{
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122
121
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BenchmarkRunner.Run<Test>();
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1
追記
answer
CHANGED
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@@ -31,4 +31,102 @@
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31
31
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Console.ReadKey();
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32
32
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}
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33
33
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}
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34
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+
```
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35
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+
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36
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+
文字列で値を持ってくるならDictionaryがありますし、別に文字列である必要が無いなら、配列やListもあります。
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37
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+
```cs
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38
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+
using System;
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39
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+
using System.Collections.Generic;
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40
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+
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41
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+
class Program
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42
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+
{
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43
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+
private static readonly string[] _ArrayMessage =
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44
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+
{
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45
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+
"ok",
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46
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+
"ng",
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47
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+
};
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48
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+
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49
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+
private static readonly Dictionary<string, string> _DictMessage = new Dictionary<string, string>()
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50
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+
{
|
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51
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+
{"Message1", "ok"},
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52
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+
{"Message2", "ng"},
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53
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+
};
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54
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+
|
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55
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+
static void Main()
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|
56
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+
{
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57
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+
Console.WriteLine(_ArrayMessage[0]);
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58
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+
Console.WriteLine(_DictMessage["Message1"]);
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59
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+
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60
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+
Console.ReadKey();
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61
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+
}
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62
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+
}
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|
63
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+
```
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64
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+
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65
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+
リフレクションの速度が非常に遅いと言われても、どれくらい遅いのかピンと来ないと思うので、[BenchmarkDotNet](https://github.com/dotnet/BenchmarkDotNet) の計測結果を載せておきます。
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66
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+
|
|
67
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+
```cs
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68
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+
using BenchmarkDotNet.Attributes;
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69
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+
using BenchmarkDotNet.Diagnosers;
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70
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+
using BenchmarkDotNet.Running;
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71
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+
using System.Collections.Generic;
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72
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+
using System.Reflection;
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73
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+
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74
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+
public static class Message
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75
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+
{
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76
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+
public static string Message1 { get; } = "ok";
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77
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+
public static string Message2 { get; } = "ng";
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78
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+
}
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79
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+
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80
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+
//計測用テストクラス
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81
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+
[MemoryDiagnoser(false)]
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82
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+
[ShortRunJob]
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83
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+
public class Test
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|
84
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+
{
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85
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+
private static readonly string[] _ArrayMessage =
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|
86
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+
{
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87
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+
"ok",
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88
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"ng",
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89
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};
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90
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+
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91
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+
private static readonly Dictionary<string, string> _DictMessage = new Dictionary<string, string>()
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92
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{
|
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93
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{"Message1", "ok"},
|
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94
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+
{"Message2", "ng"},
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95
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+
};
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96
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+
|
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97
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+
private int _Index = 0;
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98
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+
private string _StringKey = "1";
|
|
99
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+
|
|
100
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+
[Benchmark]
|
|
101
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+
public string UseRefrection()
|
|
102
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+
{
|
|
103
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+
var prop = typeof(Message).GetProperty(
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104
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+
"Message" + _StringKey,
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|
105
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+
BindingFlags.GetProperty | BindingFlags.Static | BindingFlags.Public);
|
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106
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+
|
|
107
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+
return (string)prop.GetValue(null);
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|
108
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+
}
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|
109
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+
|
|
110
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+
[Benchmark]
|
|
111
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+
public string UseArray() => _ArrayMessage[_Index];
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112
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+
|
|
113
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+
[Benchmark]
|
|
114
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+
public string UseDictionary() => _DictMessage["Message" + _StringKey];
|
|
115
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+
}
|
|
116
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+
|
|
117
|
+
class Program
|
|
118
|
+
{
|
|
119
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+
|
|
120
|
+
static void Main()
|
|
121
|
+
{
|
|
122
|
+
BenchmarkRunner.Run<Test>();
|
|
123
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+
}
|
|
124
|
+
}
|
|
125
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+
|
|
126
|
+
（計測結果）
|
|
127
|
+
| Method | Mean | Error | StdDev | Median | Allocated |
|
|
128
|
+
|-------------- |------------:|-----------:|----------:|------------:|----------:|
|
|
129
|
+
| UseRefrection | 202.8417 ns | 13.9314 ns | 0.7636 ns | 203.0229 ns | 48 B |
|
|
130
|
+
| UseArray | 0.0055 ns | 0.1723 ns | 0.0094 ns | 0.0000 ns | - |
|
|
131
|
+
| UseDictionary | 47.3129 ns | 9.5924 ns | 0.5258 ns | 47.3259 ns | 48 B |
|
|
34
132
|
```
|