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Re: Plotting performance with cywin running under Win7


From: Matthew Reich
Subject: Re: Plotting performance with cywin running under Win7
Date: Thu, 13 Jun 2013 16:52:43 -0400 (GMT-04:00)

Marco,

Thanks for the libfltk update.

On the system that I am using, the new library has the following performance 
per tic toc:
  plotting the first figure containing 10^5 points 0.094 seconds
  plotting the second figure containing 10^5 points 0.655 seconds

  plotting the first figure containing 10^7 points 0.624 seconds
  plotting the second figure containing 10^7 points 3.23 seconds

Figures still become grey when moved, and subsequently may not be redrawn until 
some GUI action such as grid toggle.  While redrawing, focus moves from Octave 
to the fltk window, which may or may not be initiated just by moving the 
window.  'tic toc' measures focus time away from Octave as:

  redrawing a figure containing 10^5 points 1.014 seconds
  moving a figure containing 10^7 points 45.897 seconds.

However, the tic toc times understates the time that Octave does not have 
focus.  After toc displays elapsed time, the Octave UI does not respond for an 
interval that increases with reported elapsed time.
For drawing the first 10^7 point figure, the Octave UI actually looses focus 
for about 6 seconds. For redrawing the 10^7 point figure, the Octave GUI 
actually looses control for well over 90 seconds. 


Thank you,
M.Reich


--------

Matthew,
latest upstream fltk seems to not suffer the problem.
plot with 1E7 points are redrawn in 4 sec, without any
focus issue.

Could you try to install  libfltk1.3-1.3.2.9933-1
from my site using

setup.exe -X -O -s http://matzeri.altervista.org

if your test are positive like mine, I will ask
the cygwin maintainer to upgrade it

Regards
Marco





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