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https://issues.apache.org/jira/browse/SOLR-114?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Yonik Seeley updated SOLR-114:
------------------------------

    Attachment: hashdocset.patch

> HashDocSet new hash(), andNot(), union()
> ----------------------------------------
>
>                 Key: SOLR-114
>                 URL: https://issues.apache.org/jira/browse/SOLR-114
>             Project: Solr
>          Issue Type: Improvement
>          Components: search
>            Reporter: Yonik Seeley
>         Attachments: hashdocset.patch
>
>
> Looking at the negative filters stuff, I realized that andNot() had no 
> optimized implementation for HashDocSet, so I implemented that and union().
> While I was in there, I did a re-analysis of hash collision rates and came up 
> with a cool new hash method that goes directly into a linear scan and is 
> hence simpler, faster, and has fewer collisions.

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