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
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