Those interested in lower memory consumption and efficiency should take a look at https://github.com/armon/statsite another statsd "clone". Originally a Python implementation statsite is now rewritten in C.
I wouldn't exactly call that a clone since it doesn't support key features of statsd (e.g. gauges) and has unique features of its own (e.g. key/value pairs).
Looks brilliant otherwise.
It is actually just a difference of naming. Gauges in statsd operate the same as kv data in statsite. Originally, both projects referred to them as kv, this seems to be a more recent change in statsd.