I am also finding the continuing increase in memory usage, but this also occurs
with other backends (I tried tkagg and pdf) and also without the call to
savefig. One possibility is a circular reference in the quiver function that
prevents data from being cleaned up.
--Michiel
--- On Mon, 1/19/09, Damon McDougall <damon.mcdoug...@gmail.com> wrote:
> From: Damon McDougall <damon.mcdoug...@gmail.com>
> Subject: [matplotlib-devel] Memory leak using savefig with MacOSX backend?
> To: "matplotlib development list" <matplotlib-devel@lists.sourceforge.net>
> Date: Monday, January 19, 2009, 6:09 AM
> I'm looping over several files (about 1000) to produce a
> vector field plot for each data file I have. Doing this with
> the MacOSX backend appears to chew memory. My guess as to
> the source of the problem is the 'savefig' function
> (or possibly the way the MacOSX backend handles the saving
> of plots).
>
> I opened Activity Monitor to watch the usage of memory
> increase. Below is code that recreates the problem.
>
> [start]
>
> import matplotlib
> matplotlib.use('macosx')
> matplotlib.rc('font',**{'family':'serif','serif':['Computer
> Modern Roman']})
> matplotlib.rc('text', usetex=True)
> from pylab import *
>
> i = 0
> x = []
> y = []
> v1 = []
> v2 = []
>
> while(True):
> f = open("%dresults.dat"%i,"r")
> for line in f:
> x.append(float(line.split()[0]))
> y.append(float(line.split()[1]))
> v1.append(float(line.split()[2]))
> v2.append(float(line.split()[3]))
> f.close()
> hold(False)
> figure(1)
> quiver(x, y, v1, v2, color='b',
> units='width', scale=1.0)
> xlabel('$x$')
> ylabel('$y$')
> grid(True)
> print i
> savefig('graph-%05d.pdf'%i)
> close(1)
> x = []
> y = []
> v1 = []
> v2 = []
> i = i + 1
>
>
> [end]
>
> Regards,
> --Damon
>
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