From: Richard Jones <rich@annexia.org>
Cc: caml-list <caml-list@inria.fr>
Subject: Re: [oliver: Re: [Caml-list] Should be INSIDE STANDARD-LIB: Hashtbl.keys]
Date: Mon, 26 Apr 2004 11:14:35 +0100 [thread overview]
Message-ID: <20040426101435.GA8694@redhat.com> (raw)
In-Reply-To: <200404252106.34024.jdh30@cam.ac.uk>
On Sun, Apr 25, 2004 at 09:06:33PM +0100, Jon Harrop wrote:
> In case anyone is interested, my peeve about carrying the length of a list
> around inside the list in the case of the STL came from my use of a data
> structure for molecular dynamics: The atomic structure is described by
> particle coordinates within a cubic box under periodic boundary conditions.
> Conventionally, the box is partitioned into voxels so that you can lookup
> neighbouring atoms efficiently. Each voxel contains a list of atoms within
> the voxel. I was often using ~10^6 voxels, so the STL list was carrying 4Mb
> of unecessary data with my data structure.
Don't you think that this is a rather special case, and probably you
should have built your own data structure?
For general purpose programming having the extra int (in STL) probably
made sense [not that I've used C++ for years, and I don't think I'll
be using it again].
Rich.
--
Richard Jones. http://www.annexia.org/ http://www.j-london.com/
Merjis Ltd. http://www.merjis.com/ - improving website return on investment
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next prev parent reply other threads:[~2004-04-26 10:14 UTC|newest]
Thread overview: 16+ messages / expand[flat|nested] mbox.gz Atom feed top
2004-04-23 20:09 Oliver Bandel
2004-04-24 3:00 ` skaller
2004-04-24 4:46 ` Jon Harrop
2004-04-24 10:39 ` Oliver Bandel
2004-04-25 18:54 ` Marcin 'Qrczak' Kowalczyk
2004-04-25 20:06 ` Jon Harrop
2004-04-26 10:14 ` Richard Jones [this message]
2004-04-26 17:13 ` Jon Harrop
2004-04-24 6:42 ` Basile STARYNKEVITCH
2004-04-24 19:12 ` skaller
2004-04-24 8:56 ` Oliver Bandel
2004-04-23 20:09 Oliver Bandel
2004-04-23 20:09 Oliver Bandel
2004-04-23 20:10 Oliver Bandel
2004-04-23 20:10 Oliver Bandel
2004-04-24 7:30 ` Martin Jambon
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