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https://issues.apache.org/jira/browse/KAFKA-2950?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Guozhang Wang resolved KAFKA-2950.
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Resolution: Fixed
Fix Version/s: 0.9.0.1
Issue resolved by pull request 632
[https://github.com/apache/kafka/pull/632]
> Performance regression in producer
> ----------------------------------
>
> Key: KAFKA-2950
> URL: https://issues.apache.org/jira/browse/KAFKA-2950
> Project: Kafka
> Issue Type: Bug
> Reporter: Jay Kreps
> Fix For: 0.9.0.1
>
>
> For small messages the producer has gotten slower since the 0.8 release. E.g.
> for a single thread on linux sending 100 byte messages the decrease seems to
> be about 30%. The root cause seems to be that the new timeout we added for
> max.block.ms ends up doing about 4 more system calls to check the ellapsed
> time.
> The reason for these calls is to detect slow serializers or partitioners. But
> I think this is not worth the performance hit. I think we can say the config
> is only for blocking due to metadata or memory allocation.
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