On 13.02.13 15:23, Lennart Regebro wrote: > On Wed, Feb 13, 2013 at 1:10 PM, Serhiy Storchaka <storch...@gmail.com> wrote: >> I prefer "x = '%s%s%s%s' % (a, b, c, d)" when string's number is more than 3 >> and some of them are literal strings. > > This has the benefit of being slow both on CPython and PyPy. Although > using .format() is even slower. :-)
Only slightly. $ ./python -m timeit -s "spam = 'spam'; ham = 'ham'" "spam + ' = ' + ham + '\n'" 1000000 loops, best of 3: 0.501 usec per loop $ ./python -m timeit -s "spam = 'spam'; ham = 'ham'" "''.join([spam, ' = ', ham, '\n'])" 1000000 loops, best of 3: 0.504 usec per loop $ ./python -m timeit -s "spam = 'spam'; ham = 'ham'" "'%s = %s\n' % (spam, ham)" 1000000 loops, best of 3: 0.524 usec per loop But the last variant looks better for me. _______________________________________________ Python-Dev mailing list Python-Dev@python.org http://mail.python.org/mailman/listinfo/python-dev Unsubscribe: http://mail.python.org/mailman/options/python-dev/archive%40mail-archive.com
