On Feb 28, 2006, at 8:11 AM, Samuru Jackson wrote:
Also heed the other recommendations in LIA and don't necessarily use
Filters when BooleanQuery clauses will suffice. There is overhead
involved in the Filter mechanism in terms of executing multiple
queries to build all the filters you're proposing.
I'm aware of the fact that using multiple filters will result in
performance problems. One point is that QueryFilters can be reused to
benefit from its caching.
BooleanQueries seem to do no caching except when using
CachingWrappingFilter.
That last statement is not correct. BooleanQuery and
CachingWrapperFilter are separate beasts. BooleanQuery does no
caching... but then again you might not need it. Experimentation is
the best judge of what is needed.
Regarding ChainedFilter ... I can't find any API on the web!
It's all open source :)
Our Subversion repository starts here: http://svn.apache.org/repos/
asf/lucene/java/trunk
And ChainedFilter is here:
<http://svn.apache.org/repos/asf/lucene/java/trunk/contrib/
miscellaneous/src/java/org/apache/lucene/misc/ChainedFilter.java>
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