Most code isn't inner loops in device drivers.

My point was that Obj C's behavior should be more or less deterministic, and method calling reasonably fast?

So "more or less" is just not good enough for you. [Edit: E.g. cache interaction is too hard to reason about when doing lookup for method dispatch, etc?]

Well, I'm too laid back to work on your problems. :-) I decided a long time ago that what I really liked most was to create lots of functionality in as short time as possible. But I admire people that care about things and learn about them relentlessly, so thanks for the information.