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From "Yonik Seeley (JIRA)" <>
Subject [jira] Resolved: (SOLR-114) HashDocSet new hash(), andNot(), union()
Date Sun, 21 Jan 2007 05:48:30 GMT


Yonik Seeley resolved SOLR-114.

    Resolution: Fixed


> HashDocSet new hash(), andNot(), union()
> ----------------------------------------
>                 Key: SOLR-114
>                 URL:
>             Project: Solr
>          Issue Type: Improvement
>          Components: search
>            Reporter: Yonik Seeley
>         Attachments: hashdocset.patch, test.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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