AA performance again

[bearophile]

Steven Schveighoffer:
> I don't see how hash insertions could be split into multiple-core operations 
> without locking, and I think you would then introduce a huge slowdown.

Okay, sorry for my comment then.
(But time ago I have found a difficult book about the implementation of purely functional data structures, among them there are hashes too. I don't know if on a dual core they can be an improvement).

Bye,
bearophile