static void Main(string[] args)
{
var argument = Int64.MaxValue.ToString();
var assembly = Assembly.LoadFile(Path.Combine(Environment.CurrentDirectory, "DynamicGenerateCode.dll"));
// 找到指定的类型和方法执行
Type type = assembly.GetType("DynamicGenerateCode.Extension");
MethodInfo methodInfo = type.GetMethod("DoWork");
// 代码生成的委托，它负责创建 Extension 示例
Func <object> creationDel = GenerteNewObjDelegate <Func <object> >(type);
Func <object, string, bool> doWorkDel = GenerteMethodCallDelegate <Func <object, string, bool> >(methodInfo, type, typeof(bool), new Type[] { typeof(object), typeof(string) });
// 比较运行时间
Console.WriteLine("== 开始示例 ==");
const int IterationCount = 10000;
Stopwatch watch = new Stopwatch();
watch.Start();
for (int i = 0; i < IterationCount; i++)
{
object extensionObject = new TimingDummy();
}
watch.Stop();
var elapsedBaseline = watch.ElapsedTicks;
Console.WriteLine("Direct ctor: 1.0x");
watch.Start();
for (int i = 0; i < IterationCount; i++)
{
object extensionObject = Activator.CreateInstance(type);
}
watch.Stop();
watch.Restart();
for (int i = 0; i < IterationCount; i++)
{
object extensionObject = creationDel();
}
watch.Stop();
Console.WriteLine("Codegen: {0:F1}x", (double)watch.ElapsedTicks / elapsedBaseline);
Console.WriteLine();
Console.WriteLine("==METHOD INVOKE==");
var extension = new TimingDummy();
watch.Start();
for (int i = 0; i < IterationCount; i++)
{
bool result = extension.DoWork(argument);
}
watch.Stop();
elapsedBaseline = watch.ElapsedTicks;
Console.WriteLine("Direct method: 1.0x");
object instance = Activator.CreateInstance(type);
watch.Start();
for (int i = 0; i < IterationCount; i++)
{
bool result = (bool)methodInfo.Invoke(instance, new object[] { argument });
}
watch.Stop();
Console.WriteLine("MethodInfo.Invoke: {0:F1}x", (double)watch.ElapsedTicks / elapsedBaseline);
object extensionObj = creationDel();
watch.Restart();
for (int i = 0; i < IterationCount; i++)
{
doWorkDel(extensionObj, argument);
}
watch.Stop();
Console.WriteLine("Codegen: {0:F1}x", (double)elapsedBaseline / watch.ElapsedTicks);
}
static void Main(string[] args)
{
var argument = Int64.MaxValue.ToString();
// Since we've already taken a dependency on the Extension (as an easy way to get it into the same directory),
// this line will load the assembly "without context" and .Net will consider it a completely different assembly.
Assembly assembly = Assembly.LoadFile(Path.Combine(Environment.CurrentDirectory, "DynamicLoadExtension.dll"));
// Find the type and method we need to execute
Type type = assembly.GetType("DynamicLoadExtension.Extension");
MethodInfo methodInfo = type.GetMethod("DoWork");
// Codegen a delegate to create the Extension instance
Func <object> creationDel = GenerateNewObjDelegate <Func <object> >(type);
Func <object, string, bool> doWorkDel = GenerateMethodCallDelegate <Func <object, string, bool> >(methodInfo, type, typeof(bool), new Type[] { typeof(object), typeof(string) });
// Compare execution times
Console.WriteLine("==CREATE INSTANCE==");
const int IterationCount = 100000;
Stopwatch watch = new Stopwatch();
watch.Start();
for (int i = 0; i < IterationCount; i++)
{
object extensionObject = new TimingDummy();
}
watch.Stop();
var elapsedBaseline = watch.ElapsedTicks;
Console.WriteLine("Direct ctor: 1.0x");
watch.Start();
for (int i = 0; i < IterationCount; i++)
{
object extensionObject = Activator.CreateInstance(type);
}
watch.Stop();
Console.WriteLine("Activator.CreateInstance: {0:F1}x", (double)watch.ElapsedTicks / elapsedBaseline);
watch.Restart();
for (int i = 0; i < IterationCount; i++)
{
object extensionObject = creationDel();
}
watch.Stop();
Console.WriteLine("Codegen: {0:F1}x", (double)watch.ElapsedTicks / elapsedBaseline);
Console.WriteLine();
Console.WriteLine("==METHOD INVOKE==");
var extension = new TimingDummy();
watch.Start();
for (int i = 0; i < IterationCount; i++)
{
bool result = extension.DoWork(argument);
}
watch.Stop();
elapsedBaseline = watch.ElapsedTicks;
Console.WriteLine("Direct method: 1.0x");
object instance = Activator.CreateInstance(type);
watch.Start();
for (int i = 0; i < IterationCount; i++)
{
bool result = (bool)methodInfo.Invoke(instance, new object[] { argument });
}
watch.Stop();
Console.WriteLine("MethodInfo.Invoke: {0:F1}x", (double)watch.ElapsedTicks / elapsedBaseline);
object extensionObj = creationDel();
watch.Restart();
for (int i = 0; i < IterationCount; i++)
{
doWorkDel(extensionObj, argument);
}
watch.Stop();
Console.WriteLine("Codegen: {0:F1}x", (double)elapsedBaseline / watch.ElapsedTicks);
}