Greg Miller created LUCENE-9918:
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Summary: 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
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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