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https://issues.apache.org/jira/browse/BEAM-11657?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Kenneth Knowles updated BEAM-11657:
-----------------------------------
Status: Open (was: Triage Needed)
> Kafka read performance regression due to added header support
> -------------------------------------------------------------
>
> Key: BEAM-11657
> URL: https://issues.apache.org/jira/browse/BEAM-11657
> Project: Beam
> Issue Type: Bug
> Components: io-java-kafka
> Reporter: Sam Whittle
> Assignee: Sam Whittle
> Priority: P2
>
> Support for headers in KafkaIO reads was recently added:
> https://issues.apache.org/jira/browse/BEAM-10865
> This introduced several reflection calls into the path of advancing
> KafkaUnboundedReader. While separately running benchmarks, I noticed this
> regression.
> Calls currently come from:
> ConsumerSpEL.hasHeaders -> can be cached similar to other booleans
> deserialize key and value methods -> could be avoided in cases where headers
> are not being examined (at a minimum can be avoided for known coders like
> ByteArrayDeserializer)
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