Re: [Visualpython-users] Memory problems with gdots()

[Bruce S. <bas...@un...>]

The gdots feature is a horrible kludge, and I'm not too surprised that 
the performance is very poor. The problem is that I need to plot 
something circular or square, not elliptical or rectangular, in a window 
that typically has very different x and y scale factors. In the absence 
of an appropriate Visual object, I'm plotting a letter "o". This has 
many disadvantages, including (probably) great slowness. What is needed 
is an option on the sphere or cylinder object that says "here is the 
radius in x, make the object look circular on the screen".

Bruce Sherwood

Andrew Dougherty wrote:

> I'm running into performance and memory problems with gdots() under Linux.
> Specifically, the following program:
> 
>     from visual.graph import *
>     gdisplay()
>     funct = gcurve()
>     for t in arange(0, 100, .1):
> 	funct.plot( pos=(t, cos(t)))
> 
> completes in about 6 seconds and uses 13 Meg of memory (according to top), but
> the same program with gdots() instead of gcurve() takes about 135 seconds
> and consumes about 96 Megs of memory!
> 
> Does anyone have any idea what's up?
> 
> Thanks,
>