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Posted to dev@lucene.apache.org by "Adrien Grand (JIRA)" <ji...@apache.org> on 2016/05/18 16:32:13 UTC
[jira] [Created] (LUCENE-7289) Half floats
Adrien Grand created LUCENE-7289:
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Summary: 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
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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