• increase SO_SNDBUF and SO_RCVBUF for improved throughput
• allow ASCII mode to be enabled, but report error when enabled during STOR
• STOR: preallocate readbuf when a new connection is made
• srv: maximize backlog size of incomming connections
• srv: detach from threads so resources of terminated threads are returned to the system
• io: reduce memory footprint
• add test cases for benchmarking transfer speeds