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From "Adrien Grand (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (LUCENE-8340) Efficient boosting by recency
Date Tue, 04 Sep 2018 09:44:00 GMT

    [ https://issues.apache.org/jira/browse/LUCENE-8340?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16602831#comment-16602831
] 

Adrien Grand commented on LUCENE-8340:
--------------------------------------

Good call, the way that the leadCost was leveraged was not very efficient. I changed the logic
to enforce that we only materialize the set of matches if there are less than leadCost/8 matches,
which resolved the main slowdowns I was seeing.

> Efficient boosting by recency
> -----------------------------
>
>                 Key: LUCENE-8340
>                 URL: https://issues.apache.org/jira/browse/LUCENE-8340
>             Project: Lucene - Core
>          Issue Type: Improvement
>            Reporter: Adrien Grand
>            Priority: Minor
>         Attachments: LUCENE-8340.patch
>
>
> I would like that we support something like \{{FeatureField.newSaturationQuery}} but
that works with features that are computed dynamically like recency or geo-distance, and is
still optimized for top-hits collection. I'm starting with recency because it makes things
a bit easier even though I suspect that geo-distance might be a more common need.



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