Github user liyezhang556520 commented on the pull request:
https://github.com/apache/spark/pull/12038#issuecomment-203213286
@vanzin , I think @zsxwing 's idea of using
`CompositeByteBuf.addComponents` is a better choice, which will only introduce
exactly one copy if the small buffer number is lager than 16 and will not
introduce any copy if that less than 16. Let me update this PR first.
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