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[Python-Dev] PEP 414 - Unicode Literals for Python 3
Antoine Pitrousolipsis at pitrou.net
Mon Feb 27 18:35:25 CET 2012
On Sun, 26 Feb 2012 12:42:53 +0000Armin Ronacher <armin.ronacher at active-4.com> wrote:> Hi,>> On 2/26/12 12:35 PM, Serhiy Storchaka wrote:> > Some microbenchmarks:> >> > $ python -m timeit -n 10000 -r 100 -s "x = 123" "'foobarbaz_%d' % x"> > 10000 loops, best of 100: 1.24 usec per loop> > $ python -m timeit -n 10000 -r 100 -s "x = 123" "str('foobarbaz_%d') % x"> > 10000 loops, best of 100: 1.59 usec per loop> > $ python -m timeit -n 10000 -r 100 -s "x = 123" "str(u'foobarbaz_%d') % x"> > 10000 loops, best of 100: 1.58 usec per loop> > $ python -m timeit -n 10000 -r 100 -s "x = 123; n = lambda s: s"> "n('foobarbaz_%d') % x"> > 10000 loops, best of 100: 1.41 usec per loop> > $ python -m timeit -n 10000 -r 100 -s "x = 123; s = 'foobarbaz_%d'" "s> % x"> > 10000 loops, best of 100: 1.22 usec per loop> >> > There are no significant overhead to use converters.> That's because what you're benchmarking here more than anything is the> overhead of eval() :-) See the benchmark linked in the PEP for one that> measures the actual performance of the string literal / wrapper.Could you update your benchmarks with the caching version of u()?ThanksAntoine.
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