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https://issues.apache.org/jira/browse/LUCENE-7517?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15595211#comment-15595211
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Michael McCandless commented on LUCENE-7517:
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bq. Seems like it should switch to doubles (that original caching was meant to
be totally transparent).
+1
And +1 to the API change.
> Explore making Scorer.score() return a double
> ---------------------------------------------
>
> Key: LUCENE-7517
> URL: https://issues.apache.org/jira/browse/LUCENE-7517
> Project: Lucene - Core
> Issue Type: Wish
> Reporter: Adrien Grand
> Priority: Minor
>
> Follow-up to
> http://search-lucene.com/m/l6pAi1BoyPJ1vr2382&subj=Re+JENKINS+EA+Lucene+Solr+master+Linux+64bit+jdk+9+ea+140+Build+18103+Unstable+.
> We could make Scorer.score() return a double in order to lose less accuracy
> when combining scores together, while still using floats on TopDocs and more
> generally all parts of the code that need to store scores.
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