[Gnuplot-py-users] possible mem leak w/ example

[Andrew S. <and...@va...>]

Hello all.  I have a snippet of code which seems to indicate a memory
leak when run using python 2.4 (not tested under other versions).

<===================>
import Gnuplot

x=range(0,100,1)
y=range(3,503,5)

case=1

w=Gnuplot.Gnuplot()
for iter in range(1000):
    print iter
    if case==1:
        d1=Gnuplot.Data(x,y)
    else:
        f1='/tmp/file123'
        f1h=open(f1,'w')
        for v1,v2 in zip(x,y):
            f1h.write('%s %s\n' % (v1,v2))
        f1h.close()

        d1=Gnuplot.File(f1)

raw_input()
<=====================>

When case=1, a large amount of memory is consumed (check ps or top)  I
get about 20meg and it depends on the number of iterations.  When
case!=1, the memory usage is quite small, less than 4meg and is
independent of iterations.

Obviously, the problem appears to be in the Gnuplot.Data() function,
but I have not been able to track it down.  It does not appear to be
related to the data passing type (fifo, inline, or temp files)


Andrew