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From "Robert Muir (JIRA)" <>
Subject [jira] [Commented] (LUCENE-6561) Add a TermContextCache to IndexSearcher
Date Fri, 12 Jun 2015 19:07:01 GMT


Robert Muir commented on LUCENE-6561:

I have concerns, there used to be a terms dict cache, and we removed it because it caused
things like concurrency slowdowns and other issues.

Generally speaking I don't think a cache is beneficial...

> Add a TermContextCache to IndexSearcher
> ---------------------------------------
>                 Key: LUCENE-6561
>                 URL:
>             Project: Lucene - Core
>          Issue Type: Improvement
>            Reporter: Alan Woodward
>         Attachments: LUCENE-6561.patch
> TermContexts can be quite expensive to build, and if you have fairly complex queries
that re-use the same terms you can end up spending a lot of time re-building the same ones
over and over again.  It would be nice to be able to cache them on an IndexSearcher, so that
they can be re-used.

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