Queue
A fast Golang queue using a ring-buffer, based on the version suggested by Dariusz Górecki.
Using this instead of other, simpler, queue implementations (slice+append or linked list) provides
substantial memory and time benefits, and fewer GC pauses.
The queue implemented here is as fast as it is in part because it is not thread-safe.
Follows semantic versioning using https://gopkg.in/ - import from
gopkg.in/eapache/queue.v1
for guaranteed API stability.