lucene-java-user mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From Grant Ingersoll <gsing...@apache.org>
Subject Re: BoostingTermQuery performance
Date Wed, 03 Oct 2007 01:19:18 GMT
https://issues.apache.org/jira/browse/LUCENE-1017


On Oct 2, 2007, at 8:25 PM, Mike Klaas wrote:

> On 2-Oct-07, at 3:44 PM, Peter Keegan wrote:
>
>> I have been experimenting with payloads and BoostingTermQuery,  
>> which I think
>> are excellent additions to Lucene core. Currently,  
>> BoostingTermQuery extends
>> SpanQuery. I would suggest changing this class to extend TermQuery  
>> and
>> refactor the current version to something like 'BoostingSpanQuery'.
>>
>> The reason is rooted in performance. In my testing, I compared query
>> throughput using TermQuery against 2 versions of BoostingTermQuery  
>> - the
>> current one that extends SpanQuery and one that extends TermQuery  
>> (which
>> I've included, below). Here are the results (qps = queries per  
>> second):
>>
>> TermQuery:    200 qps
>> BoostingTermQuery (extends SpanQuery): 97 qps
>> BoostingTermQuery (extends TermQuery): 130 qps
>>
>> Here is a version of BoostingTermQuery that extends TermQuery. I  
>> had to
>> modify TermQuery and TermScorer to make them public. A code review  
>> would be
>> in order, and I would appreciate your comments on this suggestion.
>
> Awesome!  I wasn't aware that there was such a difference.  With a  
> performance gap that large, it is definitely worth having the option.
>
> Payload have the potential to be a heavily-used feature in Lucene,  
> and performacen will be key for that.
>
> -Mike
>
> ---------------------------------------------------------------------
> To unsubscribe, e-mail: java-user-unsubscribe@lucene.apache.org
> For additional commands, e-mail: java-user-help@lucene.apache.org
>

--------------------------
Grant Ingersoll
http://lucene.grantingersoll.com

Lucene Helpful Hints:
http://wiki.apache.org/lucene-java/BasicsOfPerformance
http://wiki.apache.org/lucene-java/LuceneFAQ



---------------------------------------------------------------------
To unsubscribe, e-mail: java-user-unsubscribe@lucene.apache.org
For additional commands, e-mail: java-user-help@lucene.apache.org


Mime
View raw message