Comment #13 on issue 1949 by mattpap: Doctests for polynomials module http://code.google.com/p/sympy/issues/detail?id=1949
How were you able to make PythonFraction faster than Fraction?
Fraction is implemented in pure Python using ABCs and is very, very generic, so it's not that hard to write a simple and faster implementation that doesn't include all the useless stuff (on the low-level of ground types) (it's faster by a constant, but still this is something when gmpy is not installed).
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