From:	Tom St Denis <stdenis AT compmore DOT net>
Newsgroups:	comp.os.msdos.djgpp
Subject:	Re: (slightly OT) DJGPP Allegro is faster then MingW32 Allegro?
Date:	Mon, 29 Jan 2001 12:34:57 GMT
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In article <ac2a7t4dqt6nljbuos6iukfll85k32d7sr AT 4ax DOT com>,
  Damian Yerrick <Bullcr_pd_yerrick AT hotmail DOT comRemoveBullcr_p> wrote:
> On Sun, 28 Jan 2001 20:35:53 GMT, Tom St Denis <stdenis AT compmore DOT net>
> wrote:
>
> >When I build tests/test.exe with either I find that hline is faster in DJGPP
> >than MingW32 despite my card having "accelerated solid hline functions" (as
> >reported by allegro).
> >
> >I get 850,000 hlines per sec with DJGPP and 400,000 with MingW.
> >
> >Any clues to why it's slower?
>
> What did you have running in the background?  Windows 9x gives much
> more time to DOS tasks than Win32 tasks.  Or did you run the DJGPP
> version from plain DOS?
>
> How well optimized is driver support for your card's fill (aka solid
> hline) function?
>
> There's a lot more overhead on some calls under plain old DOS than
> there is on WinDOS.
>
> You might want to take this up with the Allegro mailing list:
>   http://www.talula.demon.co.uk/allegro/maillist.html
> as they likely know much more about Allegro (especially the non-DJGPP
> ports) than we do.

Well it gets wierder.  My 3d library+test runs at the same fps in djgpp as
ming.  It's only tests/test.exe that differs.

Tom


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