[SDL] Speeding up glClear?

Bob Pendleton bob at pendleton.com
Thu Jan 6 13:19:28 PST 2005


On Thu, 2005-01-06 at 14:47 -0600, Steve Smith wrote:
> > 250ms for a glClear is _really_ slow. It's even slower than software
> > rendering. What's your video hardware/opengl drivers ?
> 
> On the slow system, it's an old 16MB card, I don't even remember the
> manufacturer; the OpenGL drivers are the default ones that come with
> Windows 98.  

IIRC, the default Windows OpenGL drivers are software only drivers.
Assuming they are pre MMX software and you have a slow video bus then
you could see this kind of performance. I have an old p2 laptop that
gets about 4 seconds per frame (not a typo) on a lot of OpenGL apps. 

		Bob Pendleton

> I've noticed slow performance on most systems though,
> honestly - it runs just fine on mine, a pentium 2.8 with a gig of
> memory and a 256MB Geforce FX 5200.  I haven't run any timing on the
> slow systems, though.
> 
> Steve
> 
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