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https://issues.apache.org/jira/browse/LUCENE-10130?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17422556#comment-17422556
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Adrien Grand commented on LUCENE-10130:
---------------------------------------
Thanks Julie for the context. Maybe we could move forward with Robert's patch,
which should be a good incremental improvement for the way things are
implemented today and look into whether a IntHashSet would perform better in a
follow-up?
> HnswGraph could make use of a SparseFixedBitSet.getAndSet
> ---------------------------------------------------------
>
> Key: LUCENE-10130
> URL: https://issues.apache.org/jira/browse/LUCENE-10130
> Project: Lucene - Core
> Issue Type: Task
> Reporter: Robert Muir
> Priority: Major
> Attachments: LUCENE-10130.patch
>
>
> Currently HnswGraph uses SparseFixedBitSet "visited" to track where it has
> already been. The logic currently looks like this:
> {code}
> if (visited.get(entryPoint) == false) {
> visited.set(entryPoint);
> ... logic ...
> }
> {code}
> If SparseFixedBitSet had a {{getAndSet}} (like FixedBitSet), the code could
> be:
> {code}
> if (visited.getAndSet(entrypoint) == false) {
> ... logic ...
> }
> {code}
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