Re: [matplotlib-devel] Memory leaks

[Michael D. <md...@st...>]

Eric Firing wrote:
> Attached are runs with gtk, wx, qtagg, and tkagg.  Quite a variety of 
> results: tkagg is best, with only slow memory growth and a constant 
> number of python objects; qtagg grows by 2.2k per loop, with no 
> increase in python object count; wx (which is built on gtk) consumes 
> 3.5k per loop, with an increasing object count; gtk consumes 1.8k per 
> loop with an increasing object count.
>
> All runs are on stock ubuntu feisty python 2.5.
Thanks for these results.  Unfortunately, I'm seeing different results 
here.  [dagnabbit!]  None of them have an increasing object count for 
me, which leads me to suspect there's some version difference between 
your environment and mine that isn't being accounted for.

Gtk[Agg|Cairo] -- 1.3k per loop.
Wx[Agg] -- 0.010k per loop
QtAgg -- 2.3k per loop (which is in the same ballpark as your result)
Qt4Agg -- 1.4k per loop (which seems to be in the same ballpark as 
Darren Dale's result)
TkAgg -- 0.29k per loop

I don't know if the size of memory per loop is directly comparable 
between your environment and mine, but certainly the shape of the curve, 
and whether the number of Python objects is growing is very relevant.

I made some more commits to SVN on 07/03/07 necessary for recent 
versions of gtk+ and qt.  Did you (by any chance) not get those 
patches?  It would also be interesting to know which versions of the 
toolkits you have, as they are probably different from mine.  Is it safe 
to assume that they are all the stock Ubuntu feisty packages?  In any 
case, I have updated memleak_gui.py to display the relevant toolkit 
versions.  I've also attached a script to display the toolkit versions.  
Its output on my machine is:

# pygtk version: (2, 10, 4), gtk version: (2, 10, 9)
# PyQt4 version: 4.2, Qt version 40300
# pyqt version: 3.17.2, qt version: 30303
# wxPython version: 2.8.4.0
# Tkinter version: $Revision: 50704 $, Tk version: 8.4, Tcl version: 8.4

Cheers,
Mike