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https://issues.apache.org/jira/browse/KAFKA-13900?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Ismael Juma resolved KAFKA-13900.
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Resolution: Fixed
> Support Java 9 direct ByteBuffer Checksum methods
> -------------------------------------------------
>
> Key: KAFKA-13900
> URL: https://issues.apache.org/jira/browse/KAFKA-13900
> Project: Kafka
> Issue Type: Improvement
> Components: clients, core
> Affects Versions: 3.1.1
> Reporter: Francesco Nigro
> Priority: Minor
> Labels: performance, performance-benchmark
> Fix For: 3.4.0
>
>
> Java 9 has added a new Checksum method that can makes uses of ByteBuffer(s)
> (see [Java 9's
> Checksum::update|https://docs.oracle.com/javase/9/docs/api/java/util/zip/Checksum.html#update-java.nio.ByteBuffer-]):
> Kafka already provides specific support for Java 9's Cr32C, hence it makes
> sense it's going to use the most optimized version of it for direct
> ByteBuffers as well (read-only or not), instead of performing a byte-per-byte
> computation.
>
> I'm aware that currently the client's Buffer pools aren't using direct
> ByteBuffer, but having full support for it can open the door to future
> interesting optimizations on it.
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