[self-interest] UI Performance Question

Michael Latta lattam at mac.com
Tue Jun 15 22:03:18 UTC 2004

Thanks for the pointer, but that does not seem to be the issue.

If I use 120 it starts to slow down, but anything less gets the same 
8-10 fps.  The times are very consistent between two very different 
machines: 1Ghz G4 and 2.0 Ghz G5.

Self is only taking about 5% of the CPU to get 8-10 fps.  If I could 
get it to use more it would be very acceptable frame rates!

Is it the semaphores?  It looks like Self is not using OS threads so it 
should not need OS semaphores.

Any other ideas or ways to track down what is the issue would be 


On Jun 15, 2004, at 2:08 PM, Jecel Assumpcao Jr wrote:

> On Tuesday 15 June 2004 13:18, Michael Latta wrote:
>> I am new to Self but have been poking around.  The frame rate in Self
>> seems a bit low for me, and was poking around to find what is the
>> issue.  On my G4 1Ghz I get 8-10 fps, but on my dual 2.0 G5 I also
>> get 8-10 fps.  This leads me to believe there is some attempt to make
>> the fps a fixed number rather than being driven as fast as possible.
>> But I have not been able to locate any timer based throttling of the
>> step processing for activities.  Any pointers would be welcome.
> Method 'runLoop' in traits worldMorph in includes this line
>   delayIfNoInputFor: (desiredFrameTime - computeTime) max: 0.
> and 'desiredFrameTime' is defined in traits worldMorph itself as 35.
> Supposing that is milliseconds, then we should be throttling to some 28
> frames per second or so. Changing that to 15 didn't seems to have any
> effect (on a 600MHz PC) while making it 8 did. I also tried 60 which
> didn't seem to make it slower, but then 300 dropped to 3 frames per
> second.
> -- Jecel
> Yahoo! Groups Links

More information about the Self-interest mailing list