THIS IS A TEST INSTANCE. ALL YOUR CHANGES WILL BE LOST!!!!
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Current state: Under Discussion
Discussion thread: NA https://lists.apache.org/thread/tbhmkf44jhjf8lqmo7w2whynbgttf1o6
PR: https://github.com/apache/kafka/pull/12545
Motivation
Reduce Fetcher#parseRecord() memory copy: we can direct use ByteBuffer instead of byte[] to deserialize
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