Am 02.04.2015 um 18:46 schrieb James Crist:
Performance:
Using symbols() in all contexts might have performance ramifications,
creating new Symbol() objects means more memory pressure than reusing
precreated symbols from sympy.abc (which happen 521 times in SymPy
itself, hopefully just in test code).
We cache symbol creation, so Symbol('a') is Symbol('a') is True. This means
no additional memory is consumed.
Ah, I wasn't aware of that.
What happens with assumptions - do these persist? (I'm a bit worried
about tests here.)
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