Updates:
Labels: Milestone-Release0.7.0
Comment #2 on issue 1545 by fab...@fseoane.net: Efficient data
representation in logic.satisfiable()
http://code.google.com/p/sympy/issues/detail?id=1545
internal int representation should make ask much faster, since current
bottlenecks
are in Basic.__eq__ and in BooleanFunction.eval (multidimensional is
applied to that):
In[1]: %prun ask(2*x, Q.even, Assume(x, Q.integer))
Ordered by: internal time
ncalls tottime percall cumtime percall filename:lineno(function)
20411/16890 0.044 0.000 0.064 0.000 basic.py:583(__eq__)
9970 0.041 0.000 0.082 0.000
multidimensional.py:96(wrapper)
5908 0.034 0.000 0.082 0.000 basic.py:727(__invert__)
126 0.025 0.000 0.153 0.001 dpll.py:67(unit_propagate)
10176 0.018 0.000 0.024 0.000 cache.py:73(wrapper)
38860 0.015 0.000 0.015 0.000 {isinstance}
9992 0.013 0.000 0.013 0.000 {hasattr}
22 0.013 0.001 0.057 0.003 dpll.py:86(find_pure_symbol)
6020 0.008 0.000 0.011 0.000 boolalg.py:149(disjuncts)
17152 0.008 0.000 0.008 0.000
symbol.py:60(_hashable_content)
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