Date:	Tue, 05 Sep 1995 09:01:05 -0600 (MDT)
From:	Jon <JONH AT cc DOT usu DOT edu>
Subject:	Re: Graphics performance under v2.0
To:	djgpp AT sun DOT soe DOT clarkson DOT edu

On Tue, 5 Sep 1995 stwand07 AT uctvms DOT uct DOT ac DOT za wrote:

> Hi
> 
> I read somebody complain recently that graphics under V2.0 (ie LibGRX 2.0)
> is (are?) really slow compared to v 1. Just how much slower are graphics
> operations, and is this caused by the DPMI host controlling paging, etc.
> or due to "beta" code that is less optimised than previously ?
> 
> Obviously programs working unders Windows is an advantage, but if
> performance suffers I'll be staying with v 1 for quite a while to 
> come!

   Well, DPMI runs things at ring 3, which can be a bit slower than ring 
0 (I'm not sure if version 1 ran at ring 0 or not.).  However, I've been 
doing some graphics stuff using farptr.h and _farnspokeb() and it seems 
to be fast enough.

 -Jon

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