[Haskell-cafe] Marshalling

Phyx lonetiger at gmail.com
Tue Jul 13 13:07:26 EDT 2010


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 at 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 at 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 at therning.org>
> > wrote:
> >>
> >> On Tue, Jul 13, 2010 at 13:29, Phyx <lonetiger at 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
> >
> >
> > _______________________________________________
> > Haskell-Cafe mailing list
> > Haskell-Cafe at haskell.org
> > http://www.haskell.org/mailman/listinfo/haskell-cafe
> >
> >
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: http://www.haskell.org/pipermail/haskell-cafe/attachments/20100713/238617c3/attachment.html


More information about the Haskell-Cafe mailing list