gortiz commented on code in PR #8766:
URL: https://github.com/apache/pinot/pull/8766#discussion_r881295029
##########
pinot-core/src/main/java/org/apache/pinot/core/query/pruner/ColumnValueSegmentPruner.java:
##########
@@ -99,6 +102,11 @@ public List<IndexSegment> prune(List<IndexSegment>
segments, QueryContext query)
int numSegments = segments.size();
List<IndexSegment> selectedSegments = new ArrayList<>(numSegments);
+
+ // By using an IdentityHashMap, we may be creating more entries, but each
lookup will be faster
+ // which should compensate in cases where there are hundreds of segments
+ Map<Object, Hash128> hashCache = new IdentityHashMap<>();
Review Comment:
As shown by @Jackie-Jiang, in the equals case it is not correct to use the
identity, so I'm going to use a normal map here.
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