By the way, the discussion at this issue is relevant: http://code.google.com/p/sympy/issues/detail?id=1884
Aaron Meurer On Apr 30, 2011, at 5:20 PM, Vinzent Steinberg wrote: > On Apr 30, 7:36 pm, Haz <christian.mu...@gmail.com> wrote: >>> I think the only problem could be that ask() is much slower for >>> trivial queries, needs to be verified. This should be not too hard to >>> fix though. >> >> I don't think this is the case. Trivial queries (those that already have >> obvious implications) are compiled into quick reference dictionaries. In >> particular: >> -https://github.com/sympy/sympy/blob/master/sympy/assumptions/ask.py#L114 > > Thanks for clarifying. I made a quick unrepresentative benchmark: > > In [1]: x = Symbol('x', positive=True) > > In [2]: global_assumptions.add(Assume(x, Q.positive)) > > In [3]: %timeit x.is_positive > 1000000 loops, best of 3: 418 ns per loop > > In [4]: %timeit ask(x, Q.positive) > 10000 loops, best of 3: 97.3 us per loop > > > I think this is fast enough. (Even if it is about 200 times slower.) > > Vinzent -- You received this message because you are subscribed to the Google Groups "sympy" group. To post to this group, send email to sympy@googlegroups.com. To unsubscribe from this group, send email to sympy+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/sympy?hl=en.
