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.NET各种方式调用函数性能对比

所属类别：C#
推荐指数：★★☆
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本周人气：3
发布日期：2008-8-2
using System;

using System.Diagnostics;

using System.Reflection;

using System.Reflection.Emit;

using System.Runtime.CompilerServices;



public class CallTest

{

public delegate int AddDelegate(int x);



public interface IAdd

{

int add(int i);

}



public class addClass : IAdd

{

[MethodImpl(MethodImplOptions.NoInlining)]

public int add(int i)

{

return i + 1;

}



[MethodImpl(MethodImplOptions.NoInlining)]

public static int static_add(int x)

{

return x + 1;

}

}



public static MethodInfo addMethodInfo()

{

AssemblyName asmName = new AssemblyName();

asmName.Name = "DynamicAssembly";



AssemblyBuilder asmBuilder = AppDomain.CurrentDomain.DefineDynamicAssembly(asmName, AssemblyBuilderAccess.Run);

ModuleBuilder modBuilder = asmBuilder.DefineDynamicModule("DynamicModule");



MethodBuilder funBuilder = modBuilder.DefineGlobalMethod("add", MethodAttributes.Public | MethodAttributes.Static, typeof(int), new Type[1] { typeof(int) });

ILGenerator il = funBuilder.GetILGenerator();



il.Emit(OpCodes.Ldarg_0);

il.Emit(OpCodes.Ldc_I4_1);

il.Emit(OpCodes.Add);

il.Emit(OpCodes.Ret);



il.Emit(OpCodes.Ret);

modBuilder.CreateGlobalFunctions();

MethodInfo method = modBuilder.GetMethod("add");

return method;

}



public static DynamicMethod addDynamicMethod()

{

DynamicMethod dm = new DynamicMethod("add", typeof(int), new Type[] { typeof(int) });

ILGenerator il = dm.GetILGenerator();

il.Emit(OpCodes.Ldarg_0);

il.Emit(OpCodes.Ldc_I4_1);

il.Emit(OpCodes.Add);

il.Emit(OpCodes.Ret);

return dm;

}



public static IAdd addInterface()

{

Type baseType = typeof(IAdd);



//创建动态程序集。

AssemblyName asmName = new AssemblyName("add.assembly");

AssemblyBuilder assembly = AppDomain.CurrentDomain.DefineDynamicAssembly(asmName, AssemblyBuilderAccess.Run);



//创建动态模块。

ModuleBuilder module = assembly.DefineDynamicModule("add.module");



//创建类型 MyClass。

TypeBuilder type = module.DefineType("MyClass", TypeAttributes.Class, typeof(Object), new Type[] { baseType });



//创建方法

MethodAttributes attribute = baseType.GetMethod("add").Attributes & ~(MethodAttributes.Abstract);

MethodBuilder method = type.DefineMethod("add", attribute, typeof(int), new Type[1] { typeof(int) });

ILGenerator il = method.GetILGenerator();



il = method.GetILGenerator();

il.Emit(OpCodes.Ldarg_1);

il.Emit(OpCodes.Ldc_I4_1);

il.Emit(OpCodes.Add);

il.Emit(OpCodes.Ret);



// 显式接口方法需要定义 Override，而普通实现不需要。

type.DefineMethodOverride(method, baseType.GetMethod("add"));



// 创建类型 MyClass。

Type myClass = type.CreateType();

object o = Activator.CreateInstance(myClass);

IAdd iadd = o as IAdd;

return iadd;



}



static void Main(string[] args)

{

const int TIMES = 100000000;

Stopwatch time = new Stopwatch();



time.Start();

for (int i = 0; i < TIMES; )

i++;

time.Stop();

Console.WriteLine("直接执行时间:" + time.ElapsedMilliseconds);



time.Start();

for (int i = 0; i < TIMES; )

i = addClass.static_add(i);

time.Stop();

Console.WriteLine("静态函数执行时间:" + time.ElapsedMilliseconds);



time.Start();

addClass add = new addClass();

for (int i = 0; i < TIMES; )

i = add.add(i);

time.Stop();

Console.WriteLine("成员函数执行时间:" + time.ElapsedMilliseconds);



AddDelegate staticAddDelegate = new AddDelegate(addClass.static_add);

time.Start();

for (int i = 0; i < TIMES; )

i = staticAddDelegate(i);

time.Stop();

Console.WriteLine("静态方法的delegate执行时间:" + time.ElapsedMilliseconds);



time.Start();

IAdd iadd = new addClass();

for (int i = 0; i < TIMES; )

i = iadd.add(i);

time.Stop();

Console.WriteLine("接口函数执行时间:" + time.ElapsedMilliseconds);



MethodInfo addMethod = addMethodInfo();

time.Start();

for (int i = 0; i < TIMES / 100; )

i = (int)addMethod.Invoke(null, new object[1] { i });

time.Stop();

Console.WriteLine("反射Invoke执行时间:" + time.ElapsedMilliseconds * 100);



DynamicMethod dynamicMethod = addDynamicMethod();

time.Start();

for (int i = 0; i < TIMES / 100; )

i = (int)dynamicMethod.Invoke(null, new object[1] { i });

time.Stop();

Console.WriteLine("DynamicMethod.Invoke执行时间:" + time.ElapsedMilliseconds * 100);



AddDelegate dynamicAddDelegate = (AddDelegate)dynamicMethod.CreateDelegate(typeof(AddDelegate));

time.Start();

for (int i = 0; i < TIMES; )

i = dynamicAddDelegate(i);

time.Stop();

Console.WriteLine("DynamicMethod生成delegate执行时间:" + time.ElapsedMilliseconds);



IAdd dynamicIAdd = addInterface();

time.Start();

for (int i = 0; i < TIMES; )

i = dynamicIAdd.add(i);

time.Stop();

Console.WriteLine("emit生成的interface执行时间:" + time.ElapsedMilliseconds);



Console.ReadLine();

}

}

using System;

using System.Diagnostics;

using System.Reflection;

using System.Reflection.Emit;

using System.Runtime.CompilerServices;



public class CallTest

{

public delegate int AddDelegate(int x);



public interface IAdd

{

int add(int i);

}



public class addClass : IAdd

{

[MethodImpl(MethodImplOptions.NoInlining)]

public int add(int i)

{

return i + 1;

}



[MethodImpl(MethodImplOptions.NoInlining)]

public static int static_add(int x)

{

return x + 1;

}

}



public static MethodInfo addMethodInfo()

{

AssemblyName asmName = new AssemblyName();

asmName.Name = "DynamicAssembly";



AssemblyBuilder asmBuilder = AppDomain.CurrentDomain.DefineDynamicAssembly(asmName, AssemblyBuilderAccess.Run);

ModuleBuilder modBuilder = asmBuilder.DefineDynamicModule("DynamicModule");



MethodBuilder funBuilder = modBuilder.DefineGlobalMethod("add", MethodAttributes.Public | MethodAttributes.Static, typeof(int), new Type[1] { typeof(int) });

ILGenerator il = funBuilder.GetILGenerator();



il.Emit(OpCodes.Ldarg_0);

il.Emit(OpCodes.Ldc_I4_1);

il.Emit(OpCodes.Add);

il.Emit(OpCodes.Ret);



il.Emit(OpCodes.Ret);

modBuilder.CreateGlobalFunctions();

MethodInfo method = modBuilder.GetMethod("add");

return method;

}



public static DynamicMethod addDynamicMethod()

{

DynamicMethod dm = new DynamicMethod("add", typeof(int), new Type[] { typeof(int) });

ILGenerator il = dm.GetILGenerator();

il.Emit(OpCodes.Ldarg_0);

il.Emit(OpCodes.Ldc_I4_1);

il.Emit(OpCodes.Add);

il.Emit(OpCodes.Ret);

return dm;

}



public static IAdd addInterface()

{

Type baseType = typeof(IAdd);



//创建动态程序集。

AssemblyName asmName = new AssemblyName("add.assembly");

AssemblyBuilder assembly = AppDomain.CurrentDomain.DefineDynamicAssembly(asmName, AssemblyBuilderAccess.Run);



//创建动态模块。

ModuleBuilder module = assembly.DefineDynamicModule("add.module");



//创建类型 MyClass。

TypeBuilder type = module.DefineType("MyClass", TypeAttributes.Class, typeof(Object), new Type[] { baseType });



//创建方法

MethodAttributes attribute = baseType.GetMethod("add").Attributes & ~(MethodAttributes.Abstract);

MethodBuilder method = type.DefineMethod("add", attribute, typeof(int), new Type[1] { typeof(int) });

ILGenerator il = method.GetILGenerator();



il = method.GetILGenerator();

il.Emit(OpCodes.Ldarg_1);

il.Emit(OpCodes.Ldc_I4_1);

il.Emit(OpCodes.Add);

il.Emit(OpCodes.Ret);



// 显式接口方法需要定义 Override，而普通实现不需要。

type.DefineMethodOverride(method, baseType.GetMethod("add"));



// 创建类型 MyClass。

Type myClass = type.CreateType();

object o = Activator.CreateInstance(myClass);

IAdd iadd = o as IAdd;

return iadd;



}



static void Main(string[] args)

{

const int TIMES = 100000000;

Stopwatch time = new Stopwatch();



time.Start();

for (int i = 0; i < TIMES; )

i++;

time.Stop();

Console.WriteLine("直接执行时间:" + time.ElapsedMilliseconds);



time.Start();

for (int i = 0; i < TIMES; )

i = addClass.static_add(i);

time.Stop();

Console.WriteLine("静态函数执行时间:" + time.ElapsedMilliseconds);



time.Start();

addClass add = new addClass();

for (int i = 0; i < TIMES; )

i = add.add(i);

time.Stop();

Console.WriteLine("成员函数执行时间:" + time.ElapsedMilliseconds);



AddDelegate staticAddDelegate = new AddDelegate(addClass.static_add);

time.Start();

for (int i = 0; i < TIMES; )

i = staticAddDelegate(i);

time.Stop();

Console.WriteLine("静态方法的delegate执行时间:" + time.ElapsedMilliseconds);



time.Start();

IAdd iadd = new addClass();

for (int i = 0; i < TIMES; )

i = iadd.add(i);

time.Stop();

Console.WriteLine("接口函数执行时间:" + time.ElapsedMilliseconds);



MethodInfo addMethod = addMethodInfo();

time.Start();

for (int i = 0; i < TIMES / 100; )

i = (int)addMethod.Invoke(null, new object[1] { i });

time.Stop();

Console.WriteLine("反射Invoke执行时间:" + time.ElapsedMilliseconds * 100);



DynamicMethod dynamicMethod = addDynamicMethod();

time.Start();

for (int i = 0; i < TIMES / 100; )

i = (int)dynamicMethod.Invoke(null, new object[1] { i });

time.Stop();

Console.WriteLine("DynamicMethod.Invoke执行时间:" + time.ElapsedMilliseconds * 100);



AddDelegate dynamicAddDelegate = (AddDelegate)dynamicMethod.CreateDelegate(typeof(AddDelegate));

time.Start();

for (int i = 0; i < TIMES; )

i = dynamicAddDelegate(i);

time.Stop();

Console.WriteLine("DynamicMethod生成delegate执行时间:" + time.ElapsedMilliseconds);



IAdd dynamicIAdd = addInterface();

time.Start();

for (int i = 0; i < TIMES; )

i = dynamicIAdd.add(i);

time.Stop();

Console.WriteLine("emit生成的interface执行时间:" + time.ElapsedMilliseconds);



Console.ReadLine();

}

}
以下是我电脑的执行结果:
直接执行时间:105
静态函数执行时间:475
成员函数执行时间:844
静态方法的delegate执行时间:1480
接口函数执行时间:2008
反射Invoke执行时间:434000
DynamicMethod.Invoke执行时间:914600
DynamicMethod生成delegate执行时间:9674
emit生成的interface执行时间:10202

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