Michael Sokolov created LUCENE-9679:
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Summary: Try using Math.fma to speed up vector computations
Key: LUCENE-9679
URL: https://issues.apache.org/jira/browse/LUCENE-9679
Project: Lucene - Core
Issue Type: Improvement
Reporter: Michael Sokolov
On the mailing list, Anton Hägerstrand <an...@blunders.io> posted a link to a
blog post showing hotspots in our indexing:
https://blunders.io/posts/lucene-bench-2021-01-10 and identified vecto dot
product computations as one of them. Not surprising in itself, but he also
suggested we might want to try using {{Math.fma}} in the computation to see if
it can optimize the multiply-and-add operation that is at the heart of both the
dot product and l2-norm distance.
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