Re: [Matplotlib-users] dynamic plots

[Chris B. <Chr...@no...>]

Alexey Shamrin wrote:
> Why is GTKAgg is slower than GTK, but WXAgg is faster than WX?

My question exactly. It's unlikely that that Wx has to be slower than 
WxAgg. In theory, at least, wx can take advantage of hardware 
accelerated drawing. On the other hand, wx does not know about NumPy 
arrays of either flavor, so if the Agg wrappers do, they could have an 
advantage there. Also, wx is known to be much slower with numarray 
arrays than Numeric arrays. I'd would certainly recommend  that wx users 
stick with Numeric if they don't have a compelling reason to use numarray.

Another issue is font caching. Is the wx back-end doing font caching? 
this made a huge difference in the wxPyPlot code.

By the way, timing drawing on X is difficult, because the drawing calls 
return after the app has told X what to draw, not when it has been 
drawn. I suspect this might have something to do with the 1000 fps that 
was measured.

I hope I'll get a chance to do some work on the wx backend someday....

-Chris




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Christopher Barker, Ph.D.
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Chr...@no...