public void MultiMethod_Invoke_Is_Faster_Than_Cached_Dynamic_Invoke_To_Target_Method()
{
int count = 100000;
DispatchTestHelper target = new DispatchTestHelper();
D d1 = new D(), d2 = new D(), d3 = new D();
MethodInfo method = typeof(DispatchTestHelper).GetMethod(
"MM3", BindingFlags.Instance | BindingFlags.NonPublic,
Type.DefaultBinder, new Type[] { typeof(D), typeof(D), typeof(D) }, null);
DateTime start = DateTime.Now;
for (int i = 0; i < count; ++i)
{
method.Invoke(target, new object[] { d1, d2, d3 });
}
double dynamicInvokeDuration = (DateTime.Now - start).TotalMilliseconds;
start = DateTime.Now;
for (int i = 0; i < count; ++i)
{
target.MM3(d1, d2, d3);
}
double multiMethodDuration = (DateTime.Now - start).TotalMilliseconds;
Assert.Less(multiMethodDuration, dynamicInvokeDuration,
string.Format("dynamic invoke={0} is faster than multi method invoke={1}",
dynamicInvokeDuration, multiMethodDuration));
Console.WriteLine("multi method invoke={0} is faster than dynamic invoke={1}",
multiMethodDuration, dynamicInvokeDuration);
}
public void MultiMethod_Action_And_Function_Wrappers_Will_Dispatch_To_Correct_Method()
{
DispatchTestHelper check = new DispatchTestHelper();
check.MM1(new D());
Assert.AreEqual("D", check.LastResult);
check.MM2(new D(), new D());
Assert.AreEqual("DD", check.LastResult);
check.MM3(new D(), new D(), new D());
Assert.AreEqual("DDD", check.LastResult);
check.MM4(new D(), new D(), new D(), new D());
Assert.AreEqual("DDDD", check.LastResult);
Assert.AreEqual("D", check.FF1(new D()));
Assert.AreEqual("DD", check.FF2(new D(), new D()));
Assert.AreEqual("DDD", check.FF3(new D(), new D(), new D()));
Assert.AreEqual("DDDD", check.FF4(new D(), new D(), new D(), new D()));
}
