Re: how to improve sequence plotting speed (to get more fluent animation)?

[Tatsuro MATSUOKA]

Hello

The following topic is for octave for windows 8 month before.  Is it related 
the phenomena on the
discussion?

Before octave-3.2.3, octave exhausts CPU Power in plotting to gnuplot.  
This makes the speed of plot on octave/mingw32 very slow.

http://n4.nabble.com/Plotting-with-3-2-0-on-Windows-is-SLOOOOOOWWWW-td1637250.html#a1637262

sleep(0.05) in the loop as described in the thread , the CPU consumption by the 
octave is fairly
reduced (In cerelon M, it was reduced from 99% to that smaller than 20%) and 
then plot speed was
improved in one core machine.  Even for multi-core machine,wasting CPU power is 
not good.

The changeset is 
http://hg.tw-math.de/release-3-2-x/rev/9107c882f193

The above changeset seems to also be applied in the development source.

Regards

Tatsuro

--- "Dmitri A. Sergatskov wrote:

> Torsten,
> 
> How many CPU cores are in your computer?
> On my dual-core computer
> when I run the octave script I see in top 100% cpu used by  octave,
> ~25% by gnuplot and ~20% by Xorg.
> When I run perl script, then gnuplot takes 80% and Xorg ~50%
> (perl does run faster than octave by a factror of 2 or so).
> The perl script itself takes about ~2% .
> 
> So if you have a single core, then octave would compete with
> gnuplot and xorg for CPU time and thus slow things down.
> 
> Sincerely,
> 
> Dmitri.
> --
> _______________________________________________
> Help-octave mailing list
> address@hidden
> https://www-old.cae.wisc.edu/mailman/listinfo/help-octave
> 


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