From: "Jean-Christophe Filliâtre" <Jean-Christophe.Filliatre@lri.fr>
To: Jon Harrop <jon@ffconsultancy.com>
Cc: caml-list@yquem.inria.fr
Subject: Re: [Caml-list] Canonical Set/Map datastructure?
Date: Thu, 06 Mar 2008 08:45:56 +0100 [thread overview]
Message-ID: <47CFA134.50800@lri.fr> (raw)
In-Reply-To: <200803052003.46517.jon@ffconsultancy.com>
Jon Harrop wrote:
> On Wednesday 05 March 2008 17:27:38 Alain Frisch wrote:
>> Patricia trees work fine when the set elements can easily be represented
>> as strings of bits.
>> ...
>> structural equality = physical equality = set equality
>
> This is very interesting. What are the disadvantages? I'm guessing: slow value
> creation for small values and heavy memory consumption.
Regarding memory consumpion, it is true that hash-consing tables are
using memory, but sharing structurally equal values may also save some
space; see for instance the benchmarks on page 4 of
http://www.lri.fr/~filliatr/ftp/publis/hash-consing2.ps
--
Jean-Christophe
next prev parent reply other threads:[~2008-03-06 7:41 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-03-05 16:49 Berke Durak
2008-03-05 17:16 ` [Caml-list] " Brian Hurt
2008-03-05 17:27 ` Alain Frisch
2008-03-05 19:53 ` Jean-Christophe Filliâtre
2008-03-05 20:03 ` Jon Harrop
2008-03-05 21:56 ` Alain Frisch
2008-03-06 7:45 ` Jean-Christophe Filliâtre [this message]
2008-03-05 17:34 ` Harrison, John R
2008-03-06 9:53 ` Berke Durak
2008-03-06 17:36 ` Harrison, John R
2008-03-07 10:09 ` Berke Durak
2008-03-07 17:13 ` Harrison, John R
2008-03-07 10:19 ` Alain Frisch
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