Use COMPOSITE_CUMULATOR to eliminate memory copy in ByteToMessageDecoder #2739
Description
Search before asking
- I searched in the issues and found nothing similar.
Description
Netty has already introduced COMPOSITE_CUMULATOR to eliminate memory copy in ByteToMessageDecoder (netty/netty#3299)
CBB（CompositeByteBuf） has very inefficient indexing mechanism compared to other
ByteBuf impls, so it's basically trade-off between calculation
complexity and memory bandwidth.
But we don't use indexing for ByteBuf, and will read as heap memory in NettyClientHandler. Thus I advice that inner client still use MERGE_CUMULATOR while user client use COMPOSITE_CUMULATOR to reduce useless memory copy.
Willingness to contribute
- I'm willing to submit a PR!