它是否提高了低级别类型的性能铸造?

考虑一下这个例子

Interface IInterface
    Property MyProperty
End Interface

Class MyClassy : Implements IInterface
    Public Property MyProperty
End Class

Class MyClassy2 : Inherits MyClassy
End MyClassy
Class MyClassy3 : Inherits MyClassy
End MyClassy    
Class MyClassy4 : Inherits MyClassy
End MyClassy
Class MyClassy5 : Inherits MyClassy
End MyClassy

Private Sub MyHandler(sender As Object, e As EventArgs)
    'Here is my question:

    Dim lowLevel = DirectCast(sender, IInterface).MyProperty

    'vs.

    Dim highLevel = DirectCast(sender, MyClassy5).MyProperty  

End Sub

类型 sender 在上面的例子中是 MyClassy5 .

这两种铸件的性能有什么不同吗?