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https://issues.apache.org/jira/browse/KAFKA-17861?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17945505#comment-17945505
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Siddhartha Devineni commented on KAFKA-17861:
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KIP stands for Kafka Improvement Proposal and the issue is labelled with one
> Serialize with ByteBuffer instead of byte[]
> -------------------------------------------
>
> Key: KAFKA-17861
> URL: https://issues.apache.org/jira/browse/KAFKA-17861
> Project: Kafka
> Issue Type: Wish
> Components: clients, producer
> Affects Versions: 3.3.2
> Reporter: Sarah Hennenkamp
> Priority: Minor
> Labels: kip-required
>
> This is a request to consider changing the return value of the
> [Serializer|https://github.com/apache/kafka/blob/trunk/clients/src/main/java/org/apache/kafka/common/serialization/Serializer.java]
> from a byte[] to a ByteBuffer.
>
> Understandably folks may balk at this since it's a large lift. However, we've
> noticed a good chunk of memory allocation in our application comes from the
> [KafkaProducer
> serializing|https://github.com/apache/kafka/blob/trunk/clients/src/main/java/org/apache/kafka/clients/producer/KafkaProducer.java#L1045]
> the key and value pair. Using ByteBuffer could allow this to be off-heap and
> save on garbage collection time.
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