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[8 - 6 (baseTimestamp)] +  [8 - 2 (max timestamp delta)] + [4 - 2 (offset delta)] = 10 Bytes for each batch.

18% of space save for batch overhead, compared with original batch overhead 53 bytes.

For the each message header space save, using the example in KIP-98:

For example, assuming a fixed message size of 1K with 100 byte keys and reasonably close timestamps, the overhead increases by only 7 bytes for each additional batched message (2 bytes for the message size, 1 byte for attributes, 2 bytes for timestamp delta, 1 byte for offset delta, and 1 byte for key size)

14% space save for each message overhead, compared with originally 7 bytes, now only 6 bytes needed.

Proposed Changes

When writing the batch using the new version of message format, we'll default set ignoreMessageAttributes field to 1 in record batch header, and create records without attribute field.

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