Re: [Matplotlib-users] dynamic update in TkAgg ? (more)

[Todd M. <jm...@st...>]

On Fri, 2004-05-28 at 10:56, John Hunter wrote:
> >>>>> "Gary" == Gary Pajer <pa...@in...> writes:
> 
>     Gary> I took out a wristwatch and timed it instead of guessing.  I
>     Gary> get three frames per second.  It's about 4x from where we
>     Gary> started, but still slow.  I guess I'm just underpowered,
>     Gary> although a couple of years ago this was a powerhouse.  It
>     Gary> seems that matplotlib may not be suited to this task.  I
>     Gary> don't think it should take 2 GHz just to power a stripchart.
> 
> One more comment here, mainly for Todd.  
> 
> Todd, I get 34 FPS on anim.py with GTKAgg and only 21 FPS with the
> anim_tk.py, where both scripts are doing the same thing.  The profiler
> reveals a good chunk of the time is in
> 
>       103    2.300    0.022    2.300    0.022 tkagg.py:4(blit)
> 
> This may be a tk limitation, but I just wanted to point it out to you
> in case there are any optimizations you can apply to that function.

I tried a few things,  but I didn't find anymore performance blunders 
so barring the kind of optimization Perry mentioned,  I think we're
stuck.   I think most of the time is going into Tk_PhotoPutBlock.

> I'll include the anim_tk.py I'm using for profiling below.

I only got 11-12 FPS (for tkagg) on a 1.7 Ghz Pentium-IV...

Todd