Let me give some results of experience regarding these issues....
On the same dataset of 600 *7500 points, with the simple plot function,
(from the example, embedding in wxagg)

WxAgg was much faster than Wx... on a linux machine, while the WxAgg drawing
appeared close to a second or 2 after launch..., the Wx drawing was
displayed after 20 seconds. Same on Windows...

Same pattern for GTK vs GTKAgg, though less dramatic...
In a small app I wrote, containing 5 plotting windows (each containing
around 500 datapoints)
on linux, GTK take 1.2 - 1.3 sec to update the plots...GTKAgg took 0.7 - 0.8
sec...
on windows, the difference is even larger, GTK is in average 3 times slower
than GtKAgg...

As for direct comparisons between TkAgg, GTKAgg, WxAgg... it's a bit tricky
to time this stuff properly, so it's only my feelings that said that there
was no extraordinary performance difference between the different backends
(on the same datasets 600*7500 points). They pretty much felt the same, only
thing is TkAgg having drawing problems when busy and the window being
manipulated...  

jimmy

>
> There is some detail along these lines at
>
> http://matplotlib.sourceforge.net/faq/installing_faq.html#what-is-a-backend
>
> but not the feature-by-feature comparison you suggest.  But for WX vs
> WXAgg, definitely WXAgg.
>
It would be really nice to have some info regarding "speed".
I don't know if one has to distinguish let's say the time it take to
draw a line with 100k points and the "general" felling of interactive
responsiveness !?
(E.g. I thought that wx was much faster than wxAgg ... just uglier )

-
Sebastian Haase

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