Ismael Juma created KAFKA-6763:
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Summary: Consider using direct byte buffers in SslTransportLayer
Key: KAFKA-6763
URL: https://issues.apache.org/jira/browse/KAFKA-6763
Project: Kafka
Issue Type: Improvement
Reporter: Ismael Juma
We use heap byte buffers in SslTransportLayer. For netReadBuffer and
netWriteBuffer, it means that the NIO layer has to copy to/from a native buffer
before it can write/read to the socket. It would be good to test if switching
to direct byte buffers improves performance. We can't be sure as the benefit of
avoiding the copy could be offset by the specifics of the operations we perform
on netReadBuffer, netWriteBuffer and appReadBuffer.
We should benchmark produce and consume performance and try a few combinations
of direct/heap byte buffers for netReadBuffer, netWriteBuffer and appReadBuffer
(the latter should probably remain as a heap byte buffer, but no harm in
testing it too).
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