[Cuis] Curious drawing performance issue

[Phil (list)]

Dan,


On Wed, 2015-08-12 at 22:17 -0400, Dan Norton wrote:
> Hi Phil,
> 
> On Windows 7 with Cuis loaded and idle, Windows Task Manager > Performance reports 0% 
> CPU Usage. Memory Usage is 1.28 GB.
> 

What does the cpu usage show via World Menu -> Open... -> Process
Browser for Morphic?

> 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.
> 

OK, so it's not platform specific poor performance.  If you close the
BouncingAtomsMorph and wait for things to settle for a few seconds, what
does Process Browser show the Morphic cpu usage as??

> Cuis 4.2 2449, cogwin 15.22.3370
> 
>  - Dan
> 

Thanks,
Phil

> 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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> > Cuis at jvuletich.org
> > http://jvuletich.org/mailman/listinfo/cuis_jvuletich.org
> 
> 
> 
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