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From "Adrien Grand (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (LUCENE-7501) Do not encode the split dimension in the index in the 1D case
Date Wed, 02 Nov 2016 09:28:59 GMT

    [ https://issues.apache.org/jira/browse/LUCENE-7501?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15628344#comment-15628344
] 

Adrien Grand commented on LUCENE-7501:
--------------------------------------

+1

> 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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