"is" versus "<> nil" on speed?

[JSoftware]

If that's correct then you are going to check if the pointer is nil anyways before using the "is" operator. Else you risk a heavy AV

"is" includes a nil test and returns false in that case.

I don't think so. My application crashes when I try the is operator on an uninitialized pointer

edit: or atleast it did right before.. Now I can't reproduce it anymore