On Mon, Aug 1, 2011 at 6:08 AM, Anand Chitipothu <anandol...@gmail.com>wrote:
> > Hang around in #django or #python. The most elegant code that you > *should* > > write would invariably be pretty fast (am not ref to asm). > > That doesn't mean that any code that is faster is elegant. > > IIRC, in python, map function runs slightly faster than list > comprehensions, but list comprehensions is considered elegant. > It is more subtler than that. List comprehensions are faster than map functions when the latter needs to invoke a user-defined function call or a lambda. Maps score over list comprehensions in most cases where the function is a Python built-in and when no lambda is used. Example of former: >>> def f1(): map(sqr, range(1, 100)) ... >>> def f2(): [sqr(x) for x in range(1, 100)] ... >>> mytimeit.Timeit(f1) '37.91 usec/pass' >>> mytimeit.Timeit(f2) '37.50 usec/pass' Example of latter: >>> def f1(): map(hex, range(1, 100)) ... >>> def f2(): [hex(x) for x in range(1, 100)] ... >>> mytimeit.Timeit(f1) '49.41 usec/pass' >>> mytimeit.Timeit(f2) '55.29 usec/pass' > > Anand > _______________________________________________ > BangPypers mailing list > BangPypers@python.org > http://mail.python.org/mailman/listinfo/bangpypers > -- --Anand _______________________________________________ BangPypers mailing list BangPypers@python.org http://mail.python.org/mailman/listinfo/bangpypers
