msokolov commented on code in PR #932:
URL: https://github.com/apache/lucene/pull/932#discussion_r887991586
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lucene/core/src/java/org/apache/lucene/search/KnnVectorQuery.java:
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@@ -225,6 +225,11 @@ public BitSetIterator getIterator(int contextOrd) {
return new BitSetIterator(bitSets[contextOrd], cost[contextOrd]);
}
+ public void setBitSet(BitSet bitSet, int cost) {
+ bitSets[ord] = bitSet;
Review Comment:
Apparently the BitSet copying is a fairly large cost factor relative to the
HNSW search. Also, I do think we would like to eventually have a fully
supported (not just for tests) mechanism for this so that we can make more
efficient use of cached queries.
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