zt52875287 commented on code in PR #19442:
URL: https://github.com/apache/kafka/pull/19442#discussion_r2041284312


##########
clients/src/main/java/org/apache/kafka/common/internals/PartitionStates.java:
##########
@@ -138,17 +138,7 @@ private void updateSize() {
     }
 
     private void update(Map<TopicPartition, S> partitionToState) {
-        LinkedHashMap<String, List<TopicPartition>> topicToPartitions = new 
LinkedHashMap<>();
-        for (TopicPartition tp : partitionToState.keySet()) {
-            List<TopicPartition> partitions = 
topicToPartitions.computeIfAbsent(tp.topic(), k -> new ArrayList<>());
-            partitions.add(tp);
-        }
-        for (Map.Entry<String, List<TopicPartition>> entry : 
topicToPartitions.entrySet()) {
-            for (TopicPartition tp : entry.getValue()) {
-                S state = partitionToState.get(tp);
-                map.put(tp, state);
-            }
-        }
+        map.putAll(partitionToState);

Review Comment:
   Thanks for the suggestion. I've updated the code to move the logic directly 
into the `set` method as recommended.



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