Le dimanche 19 août 2012 19:03:34 UTC+2, Blind Anagram a écrit : > "Steven D'Aprano" wrote in message > > news:502f8a2a$0$29978$c3e8da3$54964...@news.astraweb.com... > > > > On Sat, 18 Aug 2012 01:09:26 -0700, wxjmfauth wrote: > > > > [...] > > If you can consistently replicate a 100% to 1000% slowdown in string > > handling, please report it as a performance bug: > > > > http://bugs.python.org/ > > > > Don't forget to report your operating system. > > > > ==================================================== > > For interest, I ran your code snippets on my laptop (Intel core-i7 1.8GHz) > > running Windows 7 x64. > > > > Running Python from a Windows command prompt, I got the following on Python > > 3.2.3 and 3.3 beta 2: > > > > python33\python" -m timeit "('abc' * 1000).replace('c', 'de')" > > 10000 loops, best of 3: 39.3 usec per loop > > python33\python" -m timeit "('ab…' * 1000).replace('…', '……')" > > 10000 loops, best of 3: 51.8 usec per loop > > python33\python" -m timeit "('ab…' * 1000).replace('…', 'x…')" > > 10000 loops, best of 3: 52 usec per loop > > python33\python" -m timeit "('ab…' * 1000).replace('…', 'œ…')" > > 10000 loops, best of 3: 50.3 usec per loop > > python33\python" -m timeit "('ab…' * 1000).replace('…', '€…')" > > 10000 loops, best of 3: 51.6 usec per loop > > python33\python" -m timeit "('XYZ' * 1000).replace('X', 'éç')" > > 10000 loops, best of 3: 38.3 usec per loop > > python33\python" -m timeit "('XYZ' * 1000).replace('Y', 'p?')" > > 10000 loops, best of 3: 50.3 usec per loop > > > > python32\python" -m timeit "('abc' * 1000).replace('c', 'de')" > > 10000 loops, best of 3: 24.5 usec per loop > > python32\python" -m timeit "('ab…' * 1000).replace('…', '……')" > > 10000 loops, best of 3: 24.7 usec per loop > > python32\python" -m timeit "('ab…' * 1000).replace('…', 'x…')" > > 10000 loops, best of 3: 24.8 usec per loop > > python32\python" -m timeit "('ab…' * 1000).replace('…', 'œ…')" > > 10000 loops, best of 3: 24 usec per loop > > python32\python" -m timeit "('ab…' * 1000).replace('…', '€…')" > > 10000 loops, best of 3: 24.1 usec per loop > > python32\python" -m timeit "('XYZ' * 1000).replace('X', 'éç')" > > 10000 loops, best of 3: 24.4 usec per loop > > python32\python" -m timeit "('XYZ' * 1000).replace('Y', 'p?')" > > 10000 loops, best of 3: 24.3 usec per loop > > > > This is an average slowdown by a factor of close to 2.3 on 3.3 when compared > > with 3.2. > > > > I am not posting this to perpetuate this thread but simply to ask whether, > > as you suggest, I should report this as a possible problem with the beta?
I use win7 pro 32bits in intel? Thanks for reporting these numbers. To be clear: I'm not complaining, but the fact that there is a slow down is a clear indication (in my mind), there is a point somewhere. jmf -- http://mail.python.org/mailman/listinfo/python-list
