Re: [matplotlib-devel] Memory leak using savefig with MacOSX backend?

[Michiel de H. <mjl...@ya...>]

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 <dam...@gm...> wrote:

> From: Damon McDougall <dam...@gm...>
> Subject: [matplotlib-devel] Memory leak using savefig with MacOSX backend?
> To: "matplotlib development list" <mat...@li...>
> 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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