Based on the comment, it's to make sure it's fast. So I think it's a good test.
I don't understand why it would use so much memory. That sounds like a definite bug to me. Does turning off the cache help? Aaron Meurer Sent from my iPad On Jul 28, 2013, at 10:05 PM, "Ondřej Čertík" <[email protected]> wrote: > Hi, > > I've noticed that the test_speed() test in > sympy/core/tests/test_diff.py eats all my memory. Here is how to > reproduce it: > > $ python -c "from sympy import Symbol; x = Symbol('x'); print x.diff(x, > 10**8)" > 0 > > It does finish, but my laptop is swapping a lot (I have 4GB of > memory). I don't think this problem is new. > In particular, it was me who committed this test in: > > https://github.com/sympy/sympy/commit/d96393c5b21a62b533c46c7e8b97ec958e1894a8 > > Over 5 years ago. To be honest, I am not quite sure what the purpose of it is. > Why would anyone need to differentiate 10**8 --- if it is anything > more complicated, it is not going to be fast anyway. > > What do you think we should do about this one? > > Ondrej > > -- > You received this message because you are subscribed to the Google Groups > "sympy" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to [email protected]. > To post to this group, send email to [email protected]. > Visit this group at http://groups.google.com/group/sympy. > For more options, visit https://groups.google.com/groups/opt_out. > > -- You received this message because you are subscribed to the Google Groups "sympy" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To post to this group, send email to [email protected]. Visit this group at http://groups.google.com/group/sympy. For more options, visit https://groups.google.com/groups/opt_out.
