That is why I mentioned it in the first place. The paper reads very much like they think using a ring buffer provides a performance advantage over other queue i

That is why I mentioned it in the first place. The paper reads very much like they think using a ring buffer provides a performance advantage over other queue implementations but then they compare two implementations using ring buffers. So their improved performance stems definitely not from using a ring buffer but from implementations details like the synchronization mechanisms used or preallocating and reusing queue entries.