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https://issues.apache.org/jira/browse/LUCENE-7289?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15305455#comment-15305455
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Adrien Grand commented on LUCENE-7289:
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Thanks Steve! I'll dig on Monday.
> 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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