public static void BuildGetMethod(EmitData td)
{
Type t = td.GetType();
PropertyInfo pi = t.GetProperty("Name");
if (pi != null)
{
MethodInfo getter = pi.GetGetMethod();
PropGet = (PropertyGetter <int>)Delegate.CreateDelegate(typeof(PropertyGetter <int>), td, getter);
}
}
public static void EmitDemo()
{
Console.Write("当前framework版本：" + Environment.Version.Major + "<br/>");
int max = 1000000;
Console.Write("循环次数：" + max + "<br/>");
//基本方法
DateTime time = DateTime.Now;
EmitData d = new EmitData();
for (int i = 0; i < max; i++)
{
d.Name = i;
}
TimeSpan ts = DateTime.Now - time;
Console.Write("基本方法:" + ts.TotalMilliseconds + "<br/>");
//反射方法
Type type = d.GetType();
PropertyInfo pi = type.GetProperty("Name");
time = DateTime.Now;
for (int i = 0; i < max; i++)
{
pi.SetValue(d, i, null);
}
ts = DateTime.Now - time;
Console.Write("反射方法:" + ts.TotalMilliseconds + "<br/>");
//dynamic动态类型方法
dynamic dobj = Activator.CreateInstance <EmitData>();
time = DateTime.Now;
for (int i = 0; i < max; i++)
{
dobj.Name = i;
}
ts = DateTime.Now - time;
Console.Write("dynamic动态类型方法:" + ts.TotalMilliseconds + "<br/>");
//泛型委托赋值方法
d.Name = -1;
BuildSetMethod(d);
time = DateTime.Now;
for (int i = 0; i < max; i++)
{
PropSet(i);
}
ts = DateTime.Now - time;
Console.Write("泛型委托赋值方法:" + ts.TotalMilliseconds + "<br/>");
Console.Write("v:" + d.Name + "<br/>");
//泛型委托取值方法
d.Name = -1;
BuildGetMethod(d);
time = DateTime.Now;
for (int i = 0; i < max; i++)
{
PropGet();
}
ts = DateTime.Now - time;
Console.Write("泛型委托取值方法:" + ts.TotalMilliseconds + "<br/>");
Console.Write("v:" + d.Name + "<br/>");
//表达式树赋值方法
d.Name = -1;
LmdSet(typeof(EmitData), "Name");
time = DateTime.Now;
for (int i = 0; i < max; i++)
{
_lmdSetProp(d, i);
}
ts = DateTime.Now - time;
Console.Write("表达式树赋值方法:" + ts.TotalMilliseconds + "<br/>");
Console.Write("v:" + d.Name + "<br/>");
//表达式树取值方法
d.Name = -132;
LmdGet(typeof(EmitData), "Name");
time = DateTime.Now;
for (int i = 0; i < max; i++)
{
_lmdGetProp(d);
}
ts = DateTime.Now - time;
Console.Write("表达式树取值方法:" + ts.TotalMilliseconds + "<br/>");
Console.Write("v:" + _lmdGetProp(d) + "<br/>");
//EMIT动态方法赋值
d.Name = -1;
BuildEmitMethod(d.GetType(), "Name");
time = DateTime.Now;
for (int i = 0; i < max; i++)
{
EmitSetValue(d, i);
}
ts = DateTime.Now - time;
Console.Write("EMIT动态方法:" + ts.TotalMilliseconds + "<br/>");
Console.Write("v:" + d.Name + "<br/>");
}