Re: with-slots on instances of structure classes and performance


That's what environment access can buy you. If (as you mentioned) you
are still using Allegro, I believe you should be able to get at this
in macros via the environment access stuff in ACL 7+.

Yes, thanks a lot, that was it. I've implemented it for Allegro (don't
see a way for CMU, but its structure accessors are fast anyway, and the
code is almost as fast), and now my code is only 15-20% slower with
Allegro than with LispWorks.

On the other hand, it is a shame that Lisp forces to do such things
manually (and in implementation-specific way), and a case when
Hindley-Milner type system and type derivation would shine.

David

.

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