Fix vectored IO for TcpStream #941
Merged
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This change implements
Write::poll_write_vectoredandRead::poll_read_vectoredonTcpStreamusing the vectored IO methods on the underlying stream. Previously, theWriteandReadtraits' default implementations were used, which just calledpoll_writeandpoll_readonce for eachIoSlice.This change correctly results in
readvandwritevsyscalls on Linux.