Lucas Bradstreet created KAFKA-8963:
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             Summary: Benchmark and optimize incremental fetch session handler
                 Key: KAFKA-8963
                 URL: https://issues.apache.org/jira/browse/KAFKA-8963
             Project: Kafka
          Issue Type: Task
            Reporter: Lucas Bradstreet


The FetchSessionHandler is a cause of high CPU usage in the replica fetcher for 
brokers with high partition counts. We should add a jmh benchmark and optimize 
the incremental fetch session building.



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