From: "Krishnaswami, Neel" <neelk@cswcasa.com>
To: "'Marcin 'Qrczak' Kowalczyk'" <qrczak@knm.org.pl>, caml-list@inria.fr
Subject: Re: [Caml-list] Sorting
Date: Fri, 2 Nov 2001 10:10:19 -0500 [thread overview]
Message-ID: <B1E4D3274D57D411BE8400D0B783FF32A8D566@exchange1.cswv.com> (raw)
Marcin 'Qrczak' Kowalczyk [mailto:qrczak@knm.org.pl] wrote:
>
> What are advantages and disadvantages in parametrizing either by '<'
> or by the 3-way comparison?
If comparisons are very expensive -- for instance, if the elements
are long strings or large sets -- then it makes for faster execution
to use a three-way comparison. On the average you will do two-thirds
as many comparisons while sorting with a three-way comparison.
I find this irritating becuase it just *feels* nicer to pass a
function of type elt -> elt -> bool to a sorting function. It's
closer to how sorting is taught, and hence to my mental model. :)
--
Neel Krishnaswami
neelk@cswcasa.com
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next reply other threads:[~2001-11-02 15:06 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2001-11-02 15:10 Krishnaswami, Neel [this message]
-- strict thread matches above, loose matches on Subject: below --
2001-10-31 13:42 Damien Doligez
2001-11-02 14:38 ` Pierre Weis
2001-10-31 7:54 Marcin 'Qrczak' Kowalczyk
2001-11-05 9:22 ` Xavier Leroy
2001-11-05 12:26 ` jeanmarc.eber
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