2019-11-18 14:44:51 +0100 received badge ● Student (source) 2019-11-18 13:45:46 +0100 asked a question Possible memory leak in polynomial evaluation Hello, if I execute this code in SageMath 8.9 RRR = RealField(prec = 165) P = PolynomialRing(RRR,'x') g = P([1..55]) gpi = RRR.pi() ME = 32 c = 1.5 gamma = 0.5 disk = [cos(2*gpi*i/ME)+I*sin(2*gpi*i/ME) for i in range(ME)] ellipse = [gamma*(w+c^2/(4*gamma^2)/w) for w in disk] while (true): max([abs(g(x=z)) for z in ellipse]) print "memory usage: " + str(get_memory_usage())  I see that the memory usage increases as time goes by. On the other hand, if I substitute the expression for ellipse with something like [1..ME], I don't see an increment in memory anymore. Is it a normal behaviour? 2019-11-16 00:12:54 +0100 asked a question Memory increasing when using constant pi Hello everybody, I have some memory problems when executing the following for cycle in SageMath (version 8.9 on Linux Mint 19.2): sage: precision = 165 sage: FFF = RealField(prec = precision) sage: MAX = 32 sage: gpi = FFF.pi() sage: trange = [2..555] ....: for t in trange: ....: d = t*[exp (2*gpi*I*i/MAX) for i in range(MAX)] ....: print "memory usage: " + str(get_memory_usage())  which outputs memory usage: 2283.20703125 memory usage: 2283.20703125 memory usage: 2283.20703125 ... memory usage: 2292.2421875 memory usage: 2292.4921875 memory usage: 2292.4921875 memory usage: 2292.4921875  I found that the situation improves if I remove the gpi variable from the for cycle, obtaining memory usage: 2274.86328125 memory usage: 2274.86328125 memory usage: 2274.86328125 ... memory usage: 2275.12109375 memory usage: 2275.12109375  Is there some way to avoid this increment in memory? Thank you in advance