On Sun, 21 Jul 2013 03:19:24 -0700, pablobarhamalzas wrote: > Thank's for all the replies! I've tried some of the imporovements you > suggested (using math.exp() and sum() or math.fsum()). None of that made > the code faster, because they are functions you are calling lots of > times, and function calling is quite time expensive (same as x**(1/2) is > faster than math.sqrt(x)).
You are *badly* mistaken. Not only is sqrt more accurate, but it is also much faster. [steve@ando ~]$ python3.3 -m timeit -s "x = 2.357e7" "x**0.5" 1000000 loops, best of 3: 0.319 usec per loop [steve@ando ~]$ python3.3 -m timeit -s "x = 2.357e7" -s "from math import sqrt" "sqrt(x)" 10000000 loops, best of 3: 0.172 usec per loop How exactly are you timing the code? -- Steven -- http://mail.python.org/mailman/listinfo/python-list
