Hey Sage-devel!
I've been experiencing memory issues dealing with Polyhedron objects for a
while now... Perhaps it is time to look if something could be done.
Here is a simple code reproducing the (what I believe to be a) memory leak.
First, I use the garbage collector to force the cleaning of memory and then
look if the python command grows in memory in a "top".
sage: while True:
P=Polyhedron(vertices=[[1,0,0],[0,1,0],[0,0,1]])
eq=P.equations()
del P, eq
gc.collect()
....:
63
31
31
31
31
...
It constantly collects garbage, which is to be expected, and on the long
run, the python command does not increase in memory usage. While, on the
contrary:
sage: while True:
....: P=Polyhedron(vertices=[[1,0,0],[0,1,0],[0,0,1]])
....: fv=P.f_vector()
....: del P, fv
....: gc.collect()
....:
0
0
0
...
Which not to be expected I guess. Then, when one waits enough, one sees in
the "top" that the memory of python increases steadily... This is bad!
I have observed the same behavior with the following functions:
adjacency_matrix
f_vector
face_lattice
facet_adjacency_matrix
facial_adjacencies
graph
is_simple
vertex_adjacencies (although deprecated, also in the new method to produce
the output)
vertex_adjacency_matrix
vertex_graph
Someone has an idea?
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