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https://issues.apache.org/jira/browse/LUCENE-4709?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Shai Erera updated LUCENE-4709:
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Attachment: LUCENE-4709.patch
Patch removes residue. I'll commit it shortly.
> Nuke FacetResultNode.residue
> ----------------------------
>
> Key: LUCENE-4709
> URL: https://issues.apache.org/jira/browse/LUCENE-4709
> Project: Lucene - Core
> Issue Type: Improvement
> Components: modules/facet
> Reporter: Shai Erera
> Assignee: Shai Erera
> Attachments: LUCENE-4709.patch
>
>
> The residue is the count of all categories that did not make it to the top K.
> But, this is a senseless statistic. Take for example the following case: two
> documents with categories [A/1, A/2, A/3] and [A/1, A/4, A/5]. If you ask for
> top-1 category of "A", you'll get A (count=2), A/1 (count=2), but A's residue
> will be 4!
> As a user, that number doesn't tell you anything, except maybe when you index
> only one category per document for a given dimension. But in that case, the
> residue is {{root.value - sum(topK.value)}}, which the application can
> compute if it needs to.
> In short, we're just wasting CPU cycles for that statistic, so I'm going to
> remove it.
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