On Nov 18, 7:35 am, "Brian Granger" <[EMAIL PROTECTED]> wrote:
> * The is_* attributes were created so that the core code in sympy
> could have a fast path for checking the types of the objects that it
> gets. I am assuming that performance tests were done and that there
> really was a net performance gain. By the way, how much of a
> difference did it make on average?
http://code.google.com/p/sympy/issues/detail?id=748
Vinzent
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