1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
|
// Copyright (c) Microsoft. All rights reserved.
// Licensed under the MIT license. See LICENSE file in the project root for full license information.
using System;
using CastingPerf2;
using Microsoft.Xunit.Performance;
namespace CastingPerf2
{
public interface IFoo
{
}
public interface IFoo_1
{
}
public interface IFoo_2
{
}
public interface IFoo_3
{
}
public interface IFoo_4
{
}
public interface IFoo_5
{
}
// C# lays the interfaces in reverse order in metadata. So IFoo is the first and IFoo_5 is last
public class Foo : IFoo_5, IFoo_4, IFoo_3, IFoo_2, IFoo_1, IFoo
{
public int m_i;
}
public class Foo_1 : Foo
{
public int m_j;
}
public class Foo_2 : Foo_1
{
public int m_k;
}
public class Foo_3 : Foo_2
{
public int m_l;
}
public class Foo_4 : Foo_3
{
public int m_m;
}
public class Foo_5 : Foo_4
{
public int m_n;
}
// C# lays the interfaces in reverse order in metadata. So IFoo_1 is the first and IFoo is last
public class Foo2 : IFoo, IFoo_5, IFoo_4, IFoo_3, IFoo_2, IFoo_1
{
public int m_i;
}
public struct FooSVT
{
public int m_i;
public int m_j;
}
public struct FooORVT
{
public Object m_o;
public Foo m_f;
}
public class CastingPerf
{
public static int j, j1, j2, j3, j4, j5, j6, j7, j8, j9;
public static Foo foo = new Foo();
public static Foo2 foo2 = new Foo2();
public static Foo n = null;
public static Foo_5 foo_5 = new Foo_5();
public static FooSVT svt = new FooSVT();
public static FooORVT orvt = new FooORVT();
public static Object o, o1, o2, o3, o4, o5, o6, o7, o8, o9;
public static Foo f, f1, f2, f3, f4, f5, f6, f7, f8, f9;
public static IFoo ifo, ifo1, ifo2, ifo3, ifo4, ifo5, ifo6, ifo7, ifo8, ifo9;
public static IFoo_5 if_0, if_1, if_2, if_3, if_4, if_5, if_6, if_7, if_8, if_9;
[Benchmark(InnerIterationCount=200000)]
public static void ObjFooIsObj()
{
foreach (var iteration in Benchmark.Iterations)
using (iteration.StartMeasurement())
for (int i = 0; i < Benchmark.InnerIterationCount; i++)
o = foo;
}
[Benchmark(InnerIterationCount=200000)]
public static void FooObjIsFoo()
{
o = foo;
foreach (var iteration in Benchmark.Iterations)
using (iteration.StartMeasurement())
for (int i = 0; i < Benchmark.InnerIterationCount; i++)
f = (Foo)o;
}
[Benchmark(InnerIterationCount=200000)]
public static void FooObjIsNull()
{
foreach (var iteration in Benchmark.Iterations)
using (iteration.StartMeasurement())
for (int i = 0; i < Benchmark.InnerIterationCount; i++)
o = (Foo)n;
}
[Benchmark(InnerIterationCount=100000)]
public static void FooObjIsDescendant()
{
o = foo_5;
foreach (var iteration in Benchmark.Iterations)
using (iteration.StartMeasurement())
for (int i = 0; i < Benchmark.InnerIterationCount; i++)
f = (Foo)o;
}
[Benchmark(InnerIterationCount=200000)]
public static void IFooFooIsIFoo()
{
foreach (var iteration in Benchmark.Iterations)
using (iteration.StartMeasurement())
for (int i = 0; i < Benchmark.InnerIterationCount; i++)
ifo = foo;
}
[Benchmark(InnerIterationCount=100000)]
public static void IFooObjIsIFoo()
{
o = foo;
foreach (var iteration in Benchmark.Iterations)
using (iteration.StartMeasurement())
for (int i = 0; i < Benchmark.InnerIterationCount; i++)
ifo = (IFoo)o;
}
[Benchmark(InnerIterationCount=100000)]
public static void IFooObjIsIFooInterAlia()
{
o = foo2;
foreach (var iteration in Benchmark.Iterations)
using (iteration.StartMeasurement())
for (int i = 0; i < Benchmark.InnerIterationCount; i++)
if_0 = (IFoo_5)o;
}
[Benchmark(InnerIterationCount=100000)]
public static void IFooObjIsDescendantOfIFoo()
{
o = foo_5;
foreach (var iteration in Benchmark.Iterations)
using (iteration.StartMeasurement())
for (int i = 0; i < Benchmark.InnerIterationCount; i++)
ifo = (IFoo)o;
}
[Benchmark(InnerIterationCount=100000)]
public static void ObjInt()
{
foreach (var iteration in Benchmark.Iterations)
using (iteration.StartMeasurement())
for (int i = 0; i < Benchmark.InnerIterationCount; i++)
o = (Object)j;
}
[Benchmark(InnerIterationCount=200000)]
public static void IntObj()
{
o = (Object)1;
foreach (var iteration in Benchmark.Iterations)
using (iteration.StartMeasurement())
for (int i = 0; i < Benchmark.InnerIterationCount; i++)
j = (int)o;
}
[Benchmark(InnerIterationCount=100000)]
public static void ObjScalarValueType()
{
foreach (var iteration in Benchmark.Iterations)
using (iteration.StartMeasurement())
for (int i = 0; i < Benchmark.InnerIterationCount; i++)
o = svt;
}
[Benchmark(InnerIterationCount=300000)]
public static void ScalarValueTypeObj()
{
o = svt;
foreach (var iteration in Benchmark.Iterations)
using (iteration.StartMeasurement())
for (int i = 0; i < Benchmark.InnerIterationCount; i++)
svt = (FooSVT)o;
}
[Benchmark(InnerIterationCount=100000)]
public static void ObjObjrefValueType()
{
foreach (var iteration in Benchmark.Iterations)
using (iteration.StartMeasurement())
for (int i = 0; i < Benchmark.InnerIterationCount; i++)
o = (Object)orvt;
}
[Benchmark(InnerIterationCount=200000)]
public static void ObjrefValueTypeObj()
{
o = (Object)orvt;
foreach (var iteration in Benchmark.Iterations)
using (iteration.StartMeasurement())
for (int i = 0; i < Benchmark.InnerIterationCount; i++)
orvt = (FooORVT)o;
}
[Benchmark(InnerIterationCount=100000)]
public static void FooObjCastIfIsa()
{
o = foo;
foreach (var iteration in Benchmark.Iterations)
using (iteration.StartMeasurement())
for (int i = 0; i < Benchmark.InnerIterationCount; i++)
if (o is Foo)
f = (Foo)o;
}
}
}
|
