From: Sven LUTHER <luther@dpt-info.u-strasbg.fr>
To: Alain Frisch <frisch@clipper.ens.fr>
Cc: Sven LUTHER <luther@dpt-info.u-strasbg.fr>, caml-list@inria.fr
Subject: Re: Cost of polymorphic variants over normal ones.
Date: Thu, 11 Jan 2001 11:44:24 +0100 [thread overview]
Message-ID: <20010111114424.A4852@lambda.u-strasbg.fr> (raw)
In-Reply-To: <Pine.GSO.4.04.10101111120260.18041-100000@clipper.ens.fr>; from frisch@clipper.ens.fr on Thu, Jan 11, 2001 at 11:40:05AM +0100
On Thu, Jan 11, 2001 at 11:40:05AM +0100, Alain Frisch wrote:
> On Thu, 11 Jan 2001, Sven LUTHER wrote:
>
> > A (somewhat) related question would be, what is the cost of polymorphic
> > variants compared to noarmal ones ?
> >
> > The normal variants are coded as integers, and using them is fast, while
> > polymorphic variants use some kind of hash functionn, but very simple.
>
> AFAIK, the hashing is done only during the compilation (or explicitly
> by external C functions). For instance (output of ocaml -dinstr):
Thanks for this info, i almost guessed that such was the cas,e but was not
sure,
Friendly,
Sven Luther
next prev parent reply other threads:[~2001-01-11 17:32 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2001-01-10 18:25 questions about costs of nativeint vs int Norman Ramsey
2001-01-11 9:17 ` Cost of polymorphic variants over normal ones Sven LUTHER
2001-01-11 10:40 ` Alain Frisch
2001-01-11 10:44 ` Sven LUTHER [this message]
2001-01-11 14:50 ` Jacques Garrigue
2001-01-11 19:14 ` Markus Mottl
2001-01-11 18:34 ` questions about costs of nativeint vs int Xavier Leroy
2001-01-11 22:17 ` Norman Ramsey
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