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https://issues.apache.org/jira/browse/KAFKA-4424?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15691904#comment-15691904
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Matthias Bechtold commented on KAFKA-4424:
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I see, thank you for your time.
I did not think right away that the order of tests would matter.
But this was very interesting to say the least, I think now that I was wrong
about the final keyword there (interesting article from IBM there).
> Make serializer classes final
> -----------------------------
>
> Key: KAFKA-4424
> URL: https://issues.apache.org/jira/browse/KAFKA-4424
> Project: Kafka
> Issue Type: Improvement
> Components: clients
> Reporter: Matthias Bechtold
> Priority: Minor
> Attachments: FinalTest.java, FinalTestReversed.java
>
>
> Implementations of simple serializers / deserializers should be final to
> prevent JVM method call overhead.
> See also:
> https://wiki.openjdk.java.net/display/HotSpot/VirtualCalls
> This breaks the API slightly, inheritors must change to generic interfaces
> Serializer / Deserializer. But architecture-wise final serialization classes
> make the most sense to me.
> So what do you think?
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