[Octave-bug-tracker] [bug #55287] Memory leak in graphics subsystem

[Rik]

Follow-up Comment #53, bug #55287 (project octave):

Okay, I'll take a look at memory.m in a minute.

For the time being, I created tst_leak1.m and tst_leak2.m which are attached. 
I find that for either test, the leaks begin with cset caa5dabc7913.  The
leaks are much faster (roughly 6X) when using plot() vs. set(), but always
there.  Also, I see no decline in memory used with increasing loop iteration. 
The leak is always growing monotonically.  I think the key to understanding
the problem is the referenced changeset.

tst_leak1.m


more off;
i=0;

do
 i += 1;
 if (mod (i,100) == 0)
   disp (i);
 endif

 data = rand (1e5, 1);
 #clf
 #cla
 plot (data);
 drawnow;

until (i > 5e3)


and tst_leak2.m


more off;
i=0;
data = rand (1e5, 1);
h = plot (data);

do
 i += 1;
 if (mod (i,100) == 0)
   disp (i);
 endif

 #clf
 #cla
 set (h, "ydata", rand (1e5, 1));
 drawnow;

until (i > 5e3)




(file #45972, file #45973)
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Additional Item Attachment:

File name: tst_leak1.m                    Size:0 KB
File name: tst_leak2.m                    Size:0 KB


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