Nowadays math.sqrt() is fast than ** 0.5 #42
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While
** 0.5
might have been faster in Python 2,math.sqrt()
is faster in Python 3.https://stackoverflow.com/questions/20226747/is-there-any-advantage-using-math-sqrtnum-over-num0-5-in-python
https://stackoverflow.com/questions/327002/which-is-faster-in-python-x-5-or-math-sqrtx
Fixes #30.