[Python-Dev] Mailbox module - timings and functionality changes

[Steve Holden]

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.

regards
 Steve
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