This is very annoying... and should have been detected automatically.
Julian started [1] and it would be good to finish setting it up!
@Marc: could you perform some C profiling (it might work directly
inside Sage via %crun [2]).
[1] https://trac.sagemath.org/ticket/25262
[2]
http://doc.sagem
Something like object creation, memory allocation, basic arithmetic, or
cython calls seems to have become a lot slower recently.
Overall, my Python code using sage runs about 10% slower with 9.0.beta6
than with 8.9. The slowdown seems to be spread evenly across many
different functions.
But he
