From: Berke Durak <berke@altern.org>
To: Markus Mottl <markus@oefai.at>, caml-list@inria.fr
Subject: Re: [Caml-list] Turning off type-checking
Date: Mon, 13 May 2002 23:47:09 +0200 [thread overview]
Message-ID: <20020513234709.A3920@gogol.zorgol> (raw)
In-Reply-To: <20020513133102.GB9777@kiefer.ai.univie.ac.at>; from markus@oefai.at on Mon, May 13, 2002 at 03:31:02PM +0200
On Mon, May 13, 2002 at 03:31:02PM +0200, Markus Mottl wrote:
> Hello,
Hi
>...
>
> Needless to say that I get into trouble when I actually want to interpret
> or compile these models to evaluate them on new data. Type checking just
> takes an awful amount of time, in fact much longer than the learning
> algorithm needs for model generation...
I'm conservatively assuming that your code uses just classical types
(guessing that type-checking objects etc. can be more costly).
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.
If these are true, a fifth question arises :
- Is it worth to make Ocaml's type checking worst-case optimal ? How will
this affect real average-case performance ?
--
Berke Durak
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next prev parent reply other threads:[~2002-05-13 21:46 UTC|newest]
Thread overview: 19+ messages / expand[flat|nested] mbox.gz Atom feed top
2002-05-13 13:31 Markus Mottl
2002-05-13 14:33 ` Lauri Alanko
2002-05-13 21:47 ` Berke Durak [this message]
2002-05-14 13:33 ` Oliver Bandel
2002-05-14 14:33 ` Jacques Garrigue
2002-05-14 23:17 ` Markus Mottl
2002-05-14 23:34 ` John Prevost
2002-05-15 8:51 ` Jacques Garrigue
2002-05-15 22:22 ` John Max Skaller
2002-05-14 3:10 Gregory Morrisett
2002-05-14 7:10 ` Francois Pottier
2002-05-14 7:56 ` eijiro_sumii
2002-05-14 12:51 ` Markus Mottl
2002-05-15 19:42 ` John Max Skaller
2002-05-15 21:02 ` Markus Mottl
2002-05-14 8:20 ` Alain Frisch
2002-05-14 10:33 ` Christophe Raffalli
2002-05-14 13:39 ` Oliver Bandel
2002-05-15 6:00 ` malc
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