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Posted to dev@lucene.apache.org by "Michael McCandless (JIRA)" <ji...@apache.org> on 2016/11/02 10:13:59 UTC

[jira] [Resolved] (LUCENE-7501) Do not encode the split dimension in the index in the 1D case

     [ https://issues.apache.org/jira/browse/LUCENE-7501?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Michael McCandless resolved LUCENE-7501.
----------------------------------------
    Resolution: Fixed

> Do not encode the split dimension in the index in the 1D case
> -------------------------------------------------------------
>
>                 Key: LUCENE-7501
>                 URL: https://issues.apache.org/jira/browse/LUCENE-7501
>             Project: Lucene - Core
>          Issue Type: Improvement
>            Reporter: Adrien Grand
>            Assignee: Adrien Grand
>            Priority: Blocker
>             Fix For: master (7.0), 6.3
>
>         Attachments: LUCENE-7501.patch, LUCENE-7501.patch, LUCENE-7501.patch
>
>
> When there is a single dimension, the split dimension is always 0, so we do not need to encode it in the index of the BKD tree. This would be 33% memory saving for half floats, 20% for ints/floats, 11% for longs/doubles and 6% for ip addresses.



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