On Tue, Jun 29, 2010 at 7:49 AM, Steve Holden <st...@holdenweb.com> wrote: > Steve Holden wrote: >> Nick Coghlan wrote: >>> Command line: ./python -m test.regrtest -v test_mailbox >>> >>> trunk: Ran 274 tests in 25.239s >>> py3k: Ran 268 tests in 26.263s >>> >>> So I don't see any substantial difference on a Kubuntu 10.04 box (both >>> builds are recent'ish, but not completely up to date). >>> >>> However, the underlying IO access is significantly different between >>> POSIX and Windows, so there could still be something pathological >>> happening at the filesystem manipulation layer. My comparisons are >>> also 2.7 vs 3.2 rather than 2.6 vs 3.1. >>> >>> Cheers, >>> Nick. >>> >> Thanks for all the timings! If a Windows user could do the same thing >> that would help ... >> > And there is *definitely a performance issue. I created a Thunderbird > folder of 26 Google alerts and just parsed then all after reading them > in from the mailbox. > > 2.5 (!): 0.78 sec > 3.1 : 42.80 sec > > Rather than debate the code here perhaps I should just open an issue for > this? I can then provide both a program and some data, which can be > added to the tests if appropriate. The issue can clearly stand some > investigation.
Since you have such a great reproducible test case, could you point the profiler at it? (Perhaps on a reduced dataset... The profiler multiples your run time by some number between 2 and 10 IIRC.) -- --Guido van Rossum (python.org/~guido) _______________________________________________ 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
