[ python-Bugs-881522 ] Shelve slow after 7/8000 key

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Bugs item #881522, was opened at 2004-01-21 11:09
Message generated for change (Comment added) made by montanaro
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Category: Windows
Group: Python 2.3
Status: Open
Resolution: None
Priority: 5
Submitted By: Marco Beri (marcoberi)
Assigned to: Nobody/Anonymous (nobody)
Summary: Shelve slow after 7/8000 key

Initial Comment:
After about 8.000 insertion shelve became really, really 
slow.
This happens only with 2.3.3 #51 on Windows, not with 
2.2 and with 2.3 on Linux.
I try with writeback True or False: same problem.
Help! :-))


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>Comment By: Skip Montanaro (montanaro)
Date: 2004-01-21 18:28

Message:
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Can't reproduce on Mac OS X.  I tried with 2.2, 2.3 and CVS using
attached test1skip.py (no writeback - 2.2 doesn't support it, no
import pickle - not used, no key prints - just muddies the water,
print whichdb's result).

The times are close enough to not worry me:

montanaro:tmp% time python2.3 test1.py
dbhash

real    0m1.927s
user    0m1.720s
sys     0m0.080s
montanaro:tmp% time python2.2 test1.py
dbhash

real    0m1.250s
user    0m0.850s
sys     0m0.360s
montanaro:tmp% time python test1.py
dbhash

real    0m2.179s
user    0m1.950s
sys     0m0.120s

Please try this modified version just to make sure we are both
looking at the same thing.



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Comment By: Marco Beri (marcoberi)
Date: 2004-01-21 17:57

Message:
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Skip Montanaro discovered that whichdb repors bsddb185 
with python 2.2 and dbhash with 2.3.3.
So why is it so slow after few thousand keys?

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Comment By: Thomas Heller (theller)
Date: 2004-01-21 12:24

Message:
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user_id=11105

Hm, are windows bugs automatically assigned to me ;-)??

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