[ptaoussanis]

Memory use is a few KB per connection. Latency is good (same ballpark as nginx in my tests with most workloads). Can't comment on data copying.

This is a new server so obviously nowhere near battle-tested yet, but anecdotally:

Both the author and I are running/testing small/medium sized deployments that are performing quite reliably.

It's much too soon to say anything conclusively, but I would say the early data I've seen is promising.