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From Stanislav Jordanov <ste...@sirma.bg>
Subject Re: Querying performance decrease in 1.9.1 and 2.0.0
Date Tue, 28 Nov 2006 11:12:58 GMT
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?

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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