richardstartin commented on a change in pull request #8139:
URL: https://github.com/apache/pinot/pull/8139#discussion_r800454205



##########
File path: 
pinot-core/src/main/java/org/apache/pinot/core/query/aggregation/function/MaxAggregationFunction.java
##########
@@ -54,13 +54,39 @@ public GroupByResultHolder createGroupByResultHolder(int 
initialCapacity, int ma
   @Override
   public void aggregate(int length, AggregationResultHolder 
aggregationResultHolder,
       Map<ExpressionContext, BlockValSet> blockValSetMap) {
-    double[] valueArray = blockValSetMap.get(_expression).getDoubleValuesSV();
     double max = aggregationResultHolder.getDoubleResult();
-    for (int i = 0; i < length; i++) {
-      double value = valueArray[i];
-      if (value > max) {
-        max = value;
+    BlockValSet blockValSet = blockValSetMap.get(_expression);

Review comment:
       The vectorized method is Copy::conjoint_swap, as mentioned above, which 
hsdis does not dissemble.




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