[Cuis] Curious drawing performance issue

[Dan Norton]

Hi Phil,

On Windows 7 with Cuis loaded and idle, Windows Task Manager > Performance reports 0% 
CPU Usage. Memory Usage is 1.28 GB.

With BouncingAtoms morphExtent: 500 at 450, stepTime 0, nAtoms 5000 the report is 24 - 
25% CPU Usage, 1.28 GB Memory Usage, 2 - 6 fps.

Cuis 4.2 2449, cogwin 15.22.3370

 - Dan

On 12 Aug 2015 at 17:44, Phil (list) wrote:

> I should also mention that the Morph window is ~ 500x450 and
> #stepTime
> is set to 0 for anyone who wants to try to replicate...
> 
> On Wed, 2015-08-12 at 17:36 -0400, Phil (list) wrote:
> > I noticed a while back that something appeared to be going on with
> Cuis
> > drawing performance (at idle on my system Morphic consumes ~20% of
> VM
> > CPU *miniumum* according to ProcessBrowser) and this seems to give
> an
> > indication of what it's currently costing in drawing
> performance...
> > 
> > After seeing the Squeak 5.0 announcement, I was curious to see
> roughly
> > how much of a speed boost we might be able to expect from Spur
> down the
> > road.  So I decided to look at BouncingAtomsMorph to try to get a
> rough
> > apples-to-apples comparison and was quite surprised: Spur was
> faster,
> > but it was too much faster.  So I dropped back to Squeak 4.5 and
> it also
> > performs much, much better than the Cuis version on the same VM.  
> Here
> > are the numbers I'm seeing using BouncingAtomsMorph with roughly
> > comparable (i.e. eyeballed) morph sizes and atom count set to
> 5000:
> > Squeak 5.0 (Spur VM from all-in-one download): 29-31 fps
> > Squeak 4.5 (Cog VM 15.25.3390): 24-26 fps
> > Cuis 2440 (Cog VM 15.25.3390): 6-8 fps
> > 
> > Granted BouncingAtomsMorph is not 100% identical from a source
> code
> > standpoint but it's not nearly different enough where I'd expect
> that
> > sort of difference.  Is this a platform-specific issue (I'm on
> Linux) or
> > are others noticing drawing issues as well?
> 
> 
> 
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