[jira] [Commented] (LUCENE-6561) Add a TermContextCache to IndexSearcher

["Robert Muir (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/LUCENE-6561?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14583910#comment-14583910 ] 

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: https://issues.apache.org/jira/browse/LUCENE-6561
>             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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