Go library for emitting metrics to StatsD.
Originally: https://github.com/cactus/go-statsd-client
m = metrics.NewWithOptions("hostname:8125",
"servicename.hostname",
metrics.Options{UseBuffering: true})
m.Inc(m.Metric("cache", "hit"), int64(hit), 1)
m.Gauge(m.Metric("cache", "size"), int64(len(cache)), 1)