Pipeline case does a lot of socket 'sendto' system calls

[toymachine]

Hi,

In the pipeline use-case it might be benificial to build up a string containing a number of commands and write them out in 1 call to socket.sendall. This will most probably result in better bandwidth usage for the socket connection and thus higher overall number of commands/sec.

[andymccurdy]

This has been resolved in 7915ef8