From: Pal-Kristian Engstad <pal_engstad@naughtydog.com>
To: Ilmari Heikkinen <ilmari.heikkinen@gmail.com>
Cc: caml-list@yquem.inria.fr
Subject: Re: [Caml-list] OCaml image blending performance
Date: Wed, 06 Feb 2008 14:12:28 -0800 [thread overview]
Message-ID: <47AA30CC.6060405@naughtydog.com> (raw)
In-Reply-To: <854c25eb0802061229o34a6155dncca9d8492cfe6932@mail.gmail.com>
If you are looking for speed, this should be done in assembly...:
http://ompf.org/forum/viewtopic.php?f=11&t=494
PKE.
Ilmari Heikkinen wrote:
> Hi,
>
> I was writing some image blending operations to get to grips with OCaml,
> and wrote the same code in C as well. Asking (and receiving) advice for
> optimizing the code on freenode #ocaml, I was told to post the code here
> as it might be an interesting compiler test.
>
> The C and Caml versions don't produce the same results, but should
> have the same amount of computation (don't take my word for it though,
> I don't know why the results differ.)
>
> The source files are:
> http://glimr.rubyforge.org/cake/blend.ml
> http://glimr.rubyforge.org/cake/blend2.ml
> http://glimr.rubyforge.org/cake/blend.c
>
> Or as a tarball:
>
> wget http://glimr.rubyforge.org/cake/blend_test.tar.gz
> tar zxf blend_test.tar.gz
> cd blend_test
> ./build.sh
>
> cblend
>
> real 0m1.466s
> user 0m1.456s
> sys 0m0.008s
>
> blend
>
> real 0m5.463s
> user 0m5.456s
> sys 0m0.012s
>
> blend2
>
> real 0m3.423s
> user 0m3.404s
> sys 0m0.012s
>
> Use them as you wish.
>
> --
> Ilmari Heikkinen
>
> _______________________________________________
> Caml-list mailing list. Subscription management:
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> Archives: http://caml.inria.fr
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>
>
--
Pål-Kristian Engstad (engstad@naughtydog.com),
Lead Graphics & Engine Programmer,
Naughty Dog, Inc., 1601 Cloverfield Blvd, 6000 North,
Santa Monica, CA 90404, USA. Ph.: (310) 633-9112.
"Most of us would do well to remember that there is a reason Carmack
is Carmack, and we are not Carmack.",
Jonathan Blow, 2/1/2006, GD Algo Mailing List
next prev parent reply other threads:[~2008-02-06 22:15 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-02-06 20:29 Ilmari Heikkinen
2008-02-06 22:12 ` Pal-Kristian Engstad [this message]
2008-02-06 23:30 ` [Caml-list] " Jon Harrop
2008-02-06 23:34 ` Jon Harrop
2008-02-07 11:01 ` Richard Jones
2008-02-07 11:13 ` Dominique Martinet
2008-02-07 12:29 ` Mauricio Fernandez
2008-02-07 15:04 ` Jon Harrop
[not found] ` <854c25eb0802070607t4b2ed641xa3bc19e8384ce23@mail.gmail.com>
2008-02-07 14:10 ` Ilmari Heikkinen
2008-02-07 14:08 ` Jon Harrop
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