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Posted to dev@kafka.apache.org by "radai rosenblatt (JIRA)" <ji...@apache.org> on 2018/03/08 00:24:01 UTC

[jira] [Created] (KAFKA-6622) GroupMetadataManager.loadGroupsAndOffsets decompresses record batch needlessly

radai rosenblatt created KAFKA-6622:
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             Summary: GroupMetadataManager.loadGroupsAndOffsets decompresses record batch needlessly
                 Key: KAFKA-6622
                 URL: https://issues.apache.org/jira/browse/KAFKA-6622
             Project: Kafka
          Issue Type: Bug
            Reporter: radai rosenblatt
            Assignee: radai rosenblatt
         Attachments: kafka batch iteration funtime.png

when reading records from a consumer offsets batch, the entire batch is decompressed multiple times (per record) as part of calling `batch.baseOffset`. this is a very expensive operation being called in a loop for no reason:
!kafka batch iteration funtime.png!



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