From: "Frédéric Gava" <frederic.gava@wanadoo.fr>
To: "Christophe TROESTLER" <Christophe.Troestler@umh.ac.be>
Cc: <caml-list@yquem.inria.fr>
Subject: Re: [Caml-list] Objective Caml release 3.08.2
Date: Sat, 27 Nov 2004 00:10:15 +0100 [thread overview]
Message-ID: <018a01c4d40d$17084da0$0cfa3151@mshome.net> (raw)
In-Reply-To: <20041125.193212.53142502.Christophe.Troestler@umh.ac.be>
> > A Set.elements without ordering the elements would be more efficient.
>
> Show us!
Depending of your implementation of Set. In the case of balanced tree, ok,
the time will be the same but this is a special case:
>----- Original Message -----
>From: "skaller" <skaller@users.sourceforge.net>
>So I would tend to think it may well be worthwhile adding
>an unordered set to Ocaml. I guess some operations may
>change from O(log N) to O(1), or from O(N log N) to just O(N),
>eg fold.
----- Original Message -----
From: "Jon Harrop" <jon@jdh30.plus.com>
>Other useful set implementations which do not present elements in-order are
>possible, most notably a hashed set because it has significantly better
>average-case performance.
In the case of associative operator for the fold, the cost would be O(N/p)
in an parallel implementation of Set where p is the number of processors. I
would tend to think it may well be worthwhile.
next prev parent reply other threads:[~2004-11-26 23:09 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2004-11-24 13:06 Damien Doligez
2004-11-25 14:47 ` [Caml-list] " Frédéric Gava
2004-11-25 15:53 ` skaller
2004-11-25 18:05 ` Frédéric Gava
2004-11-25 18:32 ` Christophe TROESTLER
2004-11-26 23:10 ` Frédéric Gava [this message]
2004-11-25 21:47 ` Jon Harrop
2004-11-25 23:34 ` skaller
2004-11-26 8:45 ` Frédéric Gava
2004-11-26 1:20 ` Aleksey Nogin
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