[SciPy-user] drawing time

[baecker at physik.tu-dresden.de]

Hi,

thank you very much for looking into this!
(Just to be sure: to enhance the effect, increase
  iterations=10000
and click several (10-20) times at different points.
Did you try this under Windows or Linux ?)

I will give more detailed tests on different machines
and report later (=Monday) to have a sample of at least three
different machines.
If you have any suggestions for this, please let me know.

Again many thanks,

Arnd

P.S.:  A few remarks on the following :

> >Johannes standard_map example (at least on my machine under debian linux):
> >  a) memory blow-up:
[...]
> This is a common plotting strategy (having this display list allows the
> renderer to output a hard copy when required that is not a bitmap image).

Valid point - however, this causes problems
in some situations, namely if one plots several thousands
of points. It seems that only pgplot and plplot (and maybe
dislin, but that's not really free) do not store the points.
However, both pgplot and plplot are not really (at least easily as
far as I know) available for MS Windows.


> It could also be that gist has memory leaks.  A possibility not
> altogether unlikely.

Hmm, but if you don't observe the problem there might be
some other reason ... (I will try tto check ...)

> >     Wouldn't it be possible to store the picture as
> >     a bitmap to allow for an easier/quicker redraw ?
> >
> Maybe, but I wouldn't go in this direction for xplt (gist).

Of course I am looking forward to chaco,
but at present I fear a bit the long tool-chain
(with wxWindows, wxPython and all their dependencies),
speed issues and, presumably it will also store all the
points which have been plotted in memory
(nice for zooming and printing, but not for several 100000 of points,
or ?) - but that might be leading to a different thread
(and I better keep my wish-list for chaco private at the moment ... ;-)