[ https://issues.apache.org/jira/browse/KAFKA-8841?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Jason Gustafson resolved KAFKA-8841. ------------------------------------ Resolution: Fixed > Optimize Partition.maybeIncrementLeaderHW > ----------------------------------------- > > Key: KAFKA-8841 > URL: https://issues.apache.org/jira/browse/KAFKA-8841 > Project: Kafka > Issue Type: Improvement > Reporter: Jason Gustafson > Assignee: Lucas Bradstreet > Priority: Major > > We've observed a noticeable cost in `Partition.maybeIncrementLeaderHW` during > profiling. Basically just all the unnecessary collection copies and > iterations over the replica set. Since this is on the hot path for handling > follower fetches, we should probably put some effort into optimizing this. > A couple ideas: > # Don't do all those copies. > # Checking whether hw needs incrementing is not necessary unless an end > offset actually changed -- This message was sent by Atlassian Jira (v8.3.4#803005)