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https://issues.apache.org/jira/browse/LUCENE-9918?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17317494#comment-17317494
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Greg Miller commented on LUCENE-9918:
-------------------------------------
I'll also mention that [~rcmuir] has some thoughts over
[here|https://github.com/apache/lucene/pull/69#discussion_r609750704] on some
other ideas to try if anyone is interested in poking around more.
> Can PForUtil be further auto-vectorized?
> ----------------------------------------
>
> Key: LUCENE-9918
> URL: https://issues.apache.org/jira/browse/LUCENE-9918
> Project: Lucene - Core
> Issue Type: Task
> Components: core/codecs
> Affects Versions: main (9.0)
> Reporter: Greg Miller
> Priority: Minor
>
> While working on LUCENE-9850, we discovered the loop in PForUtil::prefixSumOf
> is not getting auto-vectorized by the HotSpot compiler. We tried a few
> different tweaks to see if we could change this, but came up empty. There are
> some additional suggestions in the related
> [PR|https://github.com/apache/lucene/pull/69#discussion_r608412309] that
> could still be experimented with, and it may be worth doing so to see if
> further improvements could be squeezed out.
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