[ http://opensource.atlassian.com/projects/hibernate/browse/HSEARCH-131?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Emmanuel Bernard resolved HSEARCH-131.
--------------------------------------

    Resolution: Cannot Reproduce
  Fix Version/s:   (was: 3.1.0.Beta1)

This is for filter implementors, not for Hibernate Search specifically

> Make Filter caching more efficient
> ----------------------------------
>
>           Key: HSEARCH-131
>           URL: http://opensource.atlassian.com/projects/hibernate/browse/HSEARCH-131
>         Project: Hibernate Search
>       Issue Type: New Feature
>       Components: engine
>        Reporter: Emmanuel Bernard
>        Priority: Minor
>
> Emmanuel,
>
> This is the contents of a message on the Lucene boards regarding cache and filter. I thought you moght be interested in it since you weren't completely happy with your bitset filtering.
>
> ---------------------
> Check out the HashDocSet from Solr, this is the best way to cache small sets of search results. In general, the Solr BitSet/DocSet classes are more efficient than using the standard java.util.BitSet. You can use these independent of the rest of Solr (though I recommend checking out Solr if you want to do complex caching).
>
> - Thom
>
> John Patterson wrote:
> > Hi,
> >
> > I am thinking about caching search results for common queries and just
> > want to check that for small numbers of results it would be better to
> > store the doc number as ints or shorts than to store a Filter with a
> > BitSet. I guess if you results contain less than 1/32 or 1/16 of the
> > number of documents then it would take less memory.
> >
> > Is there anything else to consider?
> >
>
> Hope this helps some.
>
> John G.

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