From: Ville-Pertti Keinonen <will@exomi.com>
To: alc@PublicPropertySoftware.com
Cc: "caml Mailing List'" <caml-list@inria.fr>
Subject: Re: [Caml-list] Efficiency of 'a list
Date: Sun, 4 May 2003 10:55:24 +0300 [thread overview]
Message-ID: <C308933D-7E05-11D7-A11A-000393863F70@exomi.com> (raw)
In-Reply-To: <3EB4922A.A69C2038@PublicPropertySoftware.com>
> I've done a little timing of things, and according to my results:
> If you care about efficiency and use OCaml, you should use lists
> fairly often, ie if you are always looping and accessing the elements
> in order. OCaml can iterate through a list (recursively) about twice as
> fast as it can iterate through an array. It can iterate through a
> list about as fast as or maybe even a little faster than C or C++ can
> iterate through an array.
Don't trust microbenchmarks too far over what your knowledge of how
things should work tell you.
Iterating over arrays is certainly going to be much more cache- and
TLB-friendly.
BTW: Did you try turning off bounds checking? The OCaml optimizer
isn't smart enough to get rid of them.
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next prev parent reply other threads:[~2003-05-04 7:55 UTC|newest]
Thread overview: 42+ messages / expand[flat|nested] mbox.gz Atom feed top
2003-05-02 19:27 Eray Ozkural
2003-05-03 5:43 ` Mattias Waldau
2003-05-03 8:16 ` Ville-Pertti Keinonen
2003-05-03 14:12 ` Vitaly Lugovsky
2003-05-03 18:43 ` Mattias Waldau
2003-05-03 20:01 ` Eray Ozkural
2003-05-03 23:17 ` Eray Ozkural
2003-05-04 2:08 ` cashin
2003-05-04 4:08 ` alc
2003-05-04 5:32 ` Ed L Cashin
2003-05-04 6:46 ` [Caml-list] Two types of efficiency (Was Efficiency of 'a list) Mattias Waldau
2003-05-04 7:35 ` John Max Skaller
2003-05-04 11:52 ` Olivier Andrieu
2003-05-05 11:04 ` John Max Skaller
2003-05-04 16:48 ` brogoff
2003-05-04 7:43 ` Ville-Pertti Keinonen
2003-05-04 12:50 ` Eray Ozkural
2003-05-04 12:48 ` Eray Ozkural
2003-05-05 7:31 ` Diego Olivier Fernandez Pons
2003-05-05 11:11 ` Mattias Waldau
2003-05-05 13:17 ` John Max Skaller
2003-05-05 11:49 ` Eray Ozkural
2003-05-05 11:57 ` Yaron M. Minsky
2003-05-05 13:32 ` John Max Skaller
2003-05-06 2:49 ` Nicolas Cannasse
2003-05-06 12:30 ` Diego Olivier Fernandez Pons
2003-05-07 2:05 ` Nicolas Cannasse
2003-05-05 16:38 ` Diego Olivier Fernandez Pons
2003-05-05 18:05 ` Eray Ozkural
2003-05-06 13:28 ` Diego Olivier Fernandez Pons
2003-05-13 11:35 ` [Caml-list] Data Structure Libraries (was: Two types of efficiency) Oleg Trott
2003-05-04 7:55 ` Ville-Pertti Keinonen [this message]
2003-05-04 10:56 ` [Caml-list] Efficiency of 'a list Neel Krishnaswami
2003-05-04 12:56 ` Eray Ozkural
2003-05-04 13:35 ` Falk Hueffner
2003-05-04 12:38 ` Eray Ozkural
2003-05-04 8:07 ` Ville-Pertti Keinonen
2003-05-04 15:54 ` Ed L Cashin
2003-05-05 23:52 ` Garry Hodgson
2003-05-03 20:03 ` Eray Ozkural
2003-05-03 21:13 ` Lauri Alanko
2003-05-03 22:03 ` Eray Ozkural
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