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From "ASF subversion and git services (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (LUCENE-7289) Half floats
Date Mon, 23 May 2016 09:12:13 GMT

    [ https://issues.apache.org/jira/browse/LUCENE-7289?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15296129#comment-15296129
] 

ASF subversion and git services commented on LUCENE-7289:
---------------------------------------------------------

Commit 6d66f01c89e7b32f38078b08e2ae9742e445d5be in lucene-solr's branch refs/heads/master
from [~jpountz]
[ https://git-wip-us.apache.org/repos/asf?p=lucene-solr.git;h=6d66f01 ]

LUCENE-7289: Add HalfFloatPoint.


> Half floats
> -----------
>
>                 Key: LUCENE-7289
>                 URL: https://issues.apache.org/jira/browse/LUCENE-7289
>             Project: Lucene - Core
>          Issue Type: New Feature
>            Reporter: Adrien Grand
>            Assignee: Adrien Grand
>            Priority: Minor
>         Attachments: LUCENE-7289.patch, LUCENE-7289.patch
>
>
> When it comes to indexing floating-point data, doubles and floats are quite space-intensive
even though full precision is rarely needed. So maybe we should consider exposing half floats?
> Half floats have 5 bits for the exponent and 11 bits (including the implicit bit) for
the mantissa so the minimum value is ~6x10&#08;^−8^, the maximum is 65504 and they can
represent all integers between -2048 and 2048 accurately.



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