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From Thomas Mahler <thm...@web.de>
Subject Re: bad karma: OJB performance slow down
Date Wed, 05 Feb 2003 06:12:26 GMT
Hi Armin,
It's a very good idea to track the performance impacts of all changes we 
are doing!
We could add the performance target to the junit target. If we dod so 
this test will be included in the nightly gump builds.


cheers,
Thomas

Armin Waibel wrote:
> Hi all,
> 
> since the last version of OJB (0.9.8) I trace the
> performance of the CVS version.
> Here my results running the 'perfomance2' target
> (10 threads handle 2000 objects per thread insert/fetch/delete)
> 
>               [sec]          [sec]
> date      PB-api    ODMG-api
> ------------------------------
> 0.9.8       21,2          53,5
> 01/20      17,7          42,5
> 01/25      17,8          40,4
> 01/31      17,6          41,1
> 02/04      21,4          42,4
> 
> The refactoring made after the 0.9.8 release
> boost the PB-api performance about 17%, the
> ODMG-api about 21%. After changes made
> by Thomas (I suppose) the ODMG performance was
> enhanced about 25% compared with the 0.9.8
> version. This are great results.
> 
> But some of the changes made in the PB-api between
> 01/31 and today seems to be performance killer!
> Decrease the performance of the PB-api on the 0.9.8 level.
> 
> Does anybody has an idea how we could find out
> the 'bad' lines of code slows down the performance?
> 
> regards,
> Armin
> 
> 
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