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From Paul Elschot <paul.elsc...@xs4all.nl>
Subject Re: Querying performance decrease in 1.9.1 and 2.0.0
Date Tue, 28 Nov 2006 16:43:37 GMT
On Tuesday 28 November 2006 12:12, Stanislav Jordanov wrote:
> Paul,
> we are using a slightly modified version of Lucene,
> so in order to run the performance tests on a nightly build, I need 
> Lucene's sources, not the compiled classes.
> Is there a nice and easy way to get them?

The sources are also in the nightly build .tgz iirc.
In case you can compile your modifications into a separate
jar, the easiest way is to put that jar on the class path before
the lucene jar, and then you don't need the sources.
That compilation could also use the latest lucene jar, btw.

However, in case you want try this patch:
http://issues.apache.org/jira/browse/LUCENE-730
it just as much work to checkout the source code from the svn trunk.
The checkout command is here:
http://lucene.apache.org/java/docs/releases.html
You'll also need ant then.

I think it is time to continue to java-dev.

Regards,
Paul Elschot

> 
> Stanislav
> 
> 
> Stanislav Jordanov wrote:
> > Paul,
> > We are working on delivering the next release by the end of the week 
> > so I have to take care of 2 or 3 issues before I try the nightly build.
> > I promise to try it and report the results here.
> >
> > Best,
> > Stanislav
> >
> > Paul Elschot wrote:
> >> Stanislav,
> >>
> >> Could you also try a nightly build to test the later performance 
> >> improvement
> >> on BooleanScorer2?  The nightly builds are here:
> >> http://people.apache.org/builds/lucene/java/nightly/
> >> The jar is called lucene-core-nightly.jar in the .tar.gz build.
> >>
> >> It's not likely that this is faster than the 1.4 BooleanScorer, but 
> >> one never knows.
> >>
> >> Regards,
> >> Paul Elschot
> >>
> >>
> >> On Tuesday 21 November 2006 17:59, Yonik Seeley wrote:
> >>  
> >>> On 11/21/06, Stanislav Jordanov <stenly@sirma.bg> wrote:
> >>>    
> >>>> Switch to the old scorer (via BooleanQuery.setUseScorer14(true) )
> >>>> solved the performance issue - now Lucene 1.9.1 & 2.0.0 perform
on the
> >>>> same load test just as 1.4.3 does
> >>>>
> >>>> Thanks a lot Yonik!
> >>>>
> >>>> Any chance there exists a non-professional explanation what's the
> >>>> difference between old and new boolean scorers?
> >>>>       
> >>> The original BooleanScorer was a bucket-based scorer that could
> >>> deliver docs out of order and thus restricted how it could be used.
> >>> It also had a limitation of 32 required or prohibited clauses (because
> >>> of an int bitmask).
> >>>
> >>> BooleanScorer2 removes these limitations, and uses skipTo() where
> >>> applicable on sub-scorers.
> >>>
> >>> -Yonik
> >>> http://incubator.apache.org/solr Solr, the open-source Lucene search 
> >>> server
> >>>
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> >>>
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> >>
> >>   
> >
> >
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> 
> 
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