There is a memory leak in the evaluation of multivariable polynomials:
-C.<x,y,z>=GF(2)[]
-f=x^4+x*y^3+z^6
-get_memory_usage()
.....1014.47265625
- for i in xrange(1000000):
a=f(1,0,0)
-get_memory_usage()
.....1052.47265625
I think the problem is in the implementation of the __call__ method in
rings/polynomials/multi_polynomial_element.py . It has:
def __call__(self,*x,**kwds):
[...]
try:
K = x[0].parent()
except AttributeError:
K = self.parent().base_ring()
y = K(0)
for (m,c) in self.element().dict().iteritems():
y += c*misc.mul([ x[i]**m[i] for i in range(n) if m[i] != 0])
return y
So in every loop a new ring K is created and saved
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