I understand that part, but the strings are generated from SDocs, and So unless internally SDoc doesn't use String then I'm afraid there's nothing I can do about that :/
 
Or rather, Is there a way to efficiently make CWStrings from SDocs?
 
Regards,
Phyx

On Tue, Jul 13, 2010 at 6:56 PM, Thomas DuBuisson <thomas.dubuisson@gmail.com> wrote:
That code is effectively copying the data (thats what those peeks /
pokes do), so it stands to reason it would be slow by most performance
standards.  The reason ByteStrings are fast when used both by C and
Haskell is there is a zero-copy `useAsCString`.

Cheers,
Thomas

On Tue, Jul 13, 2010 at 7:49 AM, Phyx <lonetiger@gmail.com> wrote:
> Marshalling large amount of data from and to C
>
> http://phyx.pastebin.com/WXGBr1bX shows the code I use to do this (it's
> autogenerated, so just looking at 1 block should be enough)
>
> The tool is mine, so i can change the code it generates, but i would need to
> know how to do it better first.
>
> On Tue, Jul 13, 2010 at 3:30 PM, Magnus Therning <magnus@therning.org>
> wrote:
>>
>> On Tue, Jul 13, 2010 at 13:29, Phyx <lonetiger@gmail.com> wrote:
>> > Hello
>> >
>> > I'm wondering if anyone ever benchmarked marshalling in Haskell/GHC. No
>> > matter how much I optimize my Haskell code my program still seems to run
>> > slow, which leads me to beleive that Marshalling is painfully slow.
>> >
>> > Does anyone know a way I can test this and fix it?
>>
>> What kind of marshalling are you referring to?
>>
>> /M
>>
>> --
>> Magnus Therning                        (OpenPGP: 0xAB4DFBA4)
>> magnus＠therning．org          Jabber: magnus＠therning．org
>> http://therning.org/magnus         identi.ca|twitter: magthe
>
>
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