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https://issues.apache.org/jira/browse/LUCENE-7122?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15203920#comment-15203920
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Dawid Weiss commented on LUCENE-7122:
-------------------------------------
I have a feeling that the introduction of that conditional logic into
BytesRefArray may slow things down more than the extra spills... especially
with faster and faster SSDs, but I'll leave it to your judgement!
> BytesRefArray can be more efficient for fixed width values
> ----------------------------------------------------------
>
> Key: LUCENE-7122
> URL: https://issues.apache.org/jira/browse/LUCENE-7122
> Project: Lucene - Core
> Issue Type: Improvement
> Reporter: Michael McCandless
> Assignee: Michael McCandless
> Fix For: master, 6.1
>
> Attachments: LUCENE-7122.patch
>
>
> Today {{BytesRefArray}} uses one int ({{int[]}}, overallocated) per
> value to hold the length, but for dimensional points these values are
> always the same length.
> This can save another 4 bytes of heap per indexed dimensional point,
> which is a big improvement (more points can fit in heap at once) for
> 1D and 2D lat/lon points.
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