[Haskell-cafe] Ridiculously slow FFI, or cairo binding?

[Eugene Kirpichov]

Hi,

The actual thanks for tracking this down go to Vincent Hanquez for finding
that we're doing a lot of gmp calls (and for making me aware of ltrace),
and to Felipe Lessa for finding that this is caused by poor code generated
for cFloatConv  :)

Your changes look identical to those that I made in my copy.

On Thu, Nov 3, 2011 at 11:41 AM, Axel Simon <Axel.Simon at in.tum.de> wrote:

> Hi Eugene,
>
>
> On 02.11.2011, at 17:34, Eugene Kirpichov wrote:
>
>  Heh.
>>
>> Guess what!
>> A simple {-# INLINE cFloatConv #-} helped to the same extent!
>>
>> Axel, I think this change should be pretty easy to incorporate, and it
>> probably makes sense to inline all other functions in Types.chs too.
>>
>>
> I've added INLINE pragmas to all these odd c2hs marshalling functions.
> Could you pull and check if I've done it correctly?
>
> Thanks for tracking this down!
>
> Axel
>
>
>  Would you like me to send the trivial darcs patch or the gtk2hs team
>> will take care of this?
>>
>> On Wed, Nov 2, 2011 at 7:29 PM, Felipe Almeida Lessa
>> <felipe.lessa at gmail.com> wrote:
>>
>>> On Wed, Nov 2, 2011 at 11:24 AM, Jean-Marie Gaillourdet
>>> <jmg at gaillourdet.net> wrote:
>>>
>>>> Hi Eugene,
>>>>
>>>> did you try using the SPECIALIZE pragma? It is part of the Haskell 98
>>>> and Haskell 2010 specifications.
>>>>
>>>
>>> I don't think it's going to make any difference, as the core already
>>> have an specialized poor version.  See my first e-mail.
>>>
>>> --
>>> Felipe.
>>>
>>>
>>
>>
>> --
>> Eugene Kirpichov
>> Principal Engineer, Mirantis Inc. http://www.mirantis.com/
>> Editor, http://fprog.ru/
>>
>
>


-- 
Eugene Kirpichov
Principal Engineer, Mirantis Inc. http://www.mirantis.com/
Editor, http://fprog.ru/
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