From: Goswin von Brederlow <goswin-v-b@web.de>
To: Richard Jones <rich@annexia.org>
Cc: Goswin von Brederlow <goswin-v-b@web.de>, caml-list@inria.fr
Subject: Re: [Caml-list] Re: How to read different ints from a Bigarray?
Date: Mon, 02 Nov 2009 17:11:27 +0100 [thread overview]
Message-ID: <87bpjkyki8.fsf@frosties.localdomain> (raw)
In-Reply-To: <20091101195749.GA15428@annexia.org> (Richard Jones's message of "Sun, 1 Nov 2009 19:57:49 +0000")
Richard Jones <rich@annexia.org> writes:
> On Sun, Nov 01, 2009 at 04:11:52PM +0100, Goswin von Brederlow wrote:
>> But C calls are still 33% slower than direct access in ocaml (if one
>> doesn't use the polymorphic functions).
>
> Are you using noalloc calls?
>
> http://camltastic.blogspot.com/2008/08/tip-calling-c-functions-directly-with.html
Yes. And I looked at the bigarray module and couldn't figure out how
they differ from my own external function. Only difference I see is
the leading "%" on the external name. What does that do?
> I would love to see inline assembler supported by the compiler.
>
> Rich.
And some primitive operations on integers like sign extending and byte
swapping in the Pervasives module where the compiler emits cpu
specific code instead of a caml/C call.
MfG
Goswin
next prev parent reply other threads:[~2009-11-02 16:11 UTC|newest]
Thread overview: 39+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-10-28 13:54 Goswin von Brederlow
2009-10-28 14:16 ` Sylvain Le Gall
2009-10-28 15:00 ` [Caml-list] " Goswin von Brederlow
2009-10-28 15:17 ` Sylvain Le Gall
2009-10-28 17:57 ` [Caml-list] " Goswin von Brederlow
2009-10-28 18:19 ` Sylvain Le Gall
2009-10-28 21:05 ` [Caml-list] " Goswin von Brederlow
2009-10-28 21:26 ` Sylvain Le Gall
2009-10-28 22:48 ` [Caml-list] " blue storm
2009-10-29 9:50 ` Goswin von Brederlow
2009-10-29 10:34 ` Goswin von Brederlow
2009-10-29 12:20 ` Richard Jones
2009-10-29 17:07 ` Goswin von Brederlow
2009-10-30 20:30 ` Richard Jones
2009-11-01 15:11 ` Goswin von Brederlow
2009-11-01 19:57 ` Richard Jones
2009-11-02 16:11 ` Goswin von Brederlow [this message]
2009-11-02 16:33 ` Mauricio Fernandez
2009-11-02 20:27 ` Richard Jones
2009-11-03 13:18 ` Goswin von Brederlow
2009-11-02 20:48 ` Goswin von Brederlow
2009-10-29 20:40 ` Florian Weimer
2009-10-29 21:04 ` Gerd Stolpmann
2009-10-29 23:43 ` Goswin von Brederlow
2009-10-30 0:48 ` Gerd Stolpmann
2009-10-29 23:38 ` Goswin von Brederlow
2009-10-28 15:37 ` [Caml-list] " Olivier Andrieu
2009-10-28 16:05 ` Sylvain Le Gall
2009-10-28 15:43 ` [Caml-list] " Gerd Stolpmann
2009-10-28 16:06 ` Sylvain Le Gall
2009-10-28 18:09 ` [Caml-list] " Goswin von Brederlow
2009-10-28 17:09 ` Xavier Leroy
2009-10-28 19:05 ` Goswin von Brederlow
2009-10-29 17:05 ` Goswin von Brederlow
2009-10-29 18:42 ` Christophe TROESTLER
2009-10-29 19:03 ` Goswin von Brederlow
2009-10-29 18:48 ` Sylvain Le Gall
2009-10-29 23:25 ` [Caml-list] " Goswin von Brederlow
2009-11-03 17:16 Charles Forsyth
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