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RE: [Caml-list] Turning off type-checking
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| Date: | -- (:) |
| From: | Gregory Morrisett <jgm@C...> |
| Subject: | RE: [Caml-list] Turning off type-checking |
> Could the type experts on this list confirm or deny that : > - For ``classical'' types, type-checking amounts to > term unification. > - Term unification can be done in worst-case linear-time. > - Ocaml's unification algorithm is worst-case suboptimal. > - This explains the ``awful amount of time'' needed for > type checking. Well, type-checking ML involves more than term unification -- the worst case complexity is something truly horrible (EXP-time). Having said this, for most programs, the worst-case complexity rarely, if ever arises in "natural" code. (I've not run into it...) So, I'd actually be surprised if there was any significant speedup obtained by eliminating the type-inference from the compilation path. -Greg ------------------- To unsubscribe, mail caml-list-request@inria.fr Archives: http://caml.inria.fr Bug reports: http://caml.inria.fr/bin/caml-bugs FAQ: http://caml.inria.fr/FAQ/ Beginner's list: http://groups.yahoo.com/group/ocaml_beginners