[jira] [Created] (KAFKA-2654) Avoid calling Consumer.poll(0) in each iteration

[Guozhang Wang (JIRA)]

Guozhang Wang created KAFKA-2654:
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             Summary: Avoid calling Consumer.poll(0) in each iteration
                 Key: KAFKA-2654
                 URL: https://issues.apache.org/jira/browse/KAFKA-2654
             Project: Kafka
          Issue Type: Sub-task
            Reporter: Guozhang Wang
            Assignee: Yasuhiro Matsuda
             Fix For: 0.9.1


Currently we are calling consumer.poll() in each iteration though most time it 
is poll(0).

poll(0) itself is not completely free since it involves a bunch of system 
calls, hence we'd better avoid calling it in each iteration.



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