Runtime: Question: interface call and generated ASM

Hi Guys!

Have a very simple app, that call interface method like this.

namespace InterfaceCalls
{
    public interface IFoo
    {
        int  Bar();
    }

    class Program
    {
        public static int M1(IFoo foo)
        {
            return foo.Bar();
        }

        static void Main(string[] args)
        {
            M1(null);
        }
    }
}

That generates the following ASM for 2.2 (for 3.0 there is lea rsp,[rbp] instead of add rsp,30h)

            return foo.Bar();
00007FFE7B521846  mov         rcx,rsi  
00007FFE7B521849  mov         r11,7FFE7B410028h  
00007FFE7B521853  cmp         dword ptr [rcx],ecx  
00007FFE7B521855  call        qword ptr [7FFE7B410028h]  
00007FFE7B52185B  nop  
00007FFE7B52185C  add         rsp,30h  
00007FFE7B521860  pop         rsi  
00007FFE7B521861  ret  

Sorry for potentially very dumb and novice questions :) but could someone please give me a hint on:

1 Why do we need cmp instruction here (there is no any conditional jump after the cmp)
2 What is 7FFE7B410028h and why we load in r11 here
3 Isn't it too expensive to have cmp per interface call (could cml in that case cause branch prediction miss?)

Thank you a lot!