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https://issues.apache.org/jira/browse/LUCENE-9613?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17404408#comment-17404408
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Adrien Grand commented on LUCENE-9613:
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Since this change didn't change the on-disk format for ordinals in the common
case, I suspect we could get the performance back by adding some more
specialization, I'll look into it.
> Create blocks for ords when it helps in Lucene80DocValuesFormat
> ---------------------------------------------------------------
>
> Key: LUCENE-9613
> URL: https://issues.apache.org/jira/browse/LUCENE-9613
> Project: Lucene - Core
> Issue Type: Improvement
> Reporter: Adrien Grand
> Priority: Minor
> Fix For: main (9.0)
>
> Time Spent: 1h 10m
> Remaining Estimate: 0h
>
> Currently for sorted(-set) values, we always write ords using
> log2(valueCount) bits per entry. However in several cases like when the field
> is used in the index sort, or if one value is _very_common, splitting into
> blocks like we do for numerics would help.
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