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Posted to dev@lucene.apache.org by "Adrien Grand (JIRA)" <ji...@apache.org> on 2016/05/23 09:20:12 UTC
[jira] [Resolved] (LUCENE-7289) Half floats
[ https://issues.apache.org/jira/browse/LUCENE-7289?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Adrien Grand resolved LUCENE-7289.
----------------------------------
Resolution: Fixed
Fix Version/s: master (7.0)
6.1
Pushed to the sandbox.
> 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
> Fix For: 6.1, master (7.0)
>
> 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^−8^, the maximum is 65504 and they can represent all integers between -2048 and 2048 accurately.
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