Issues re-using connections right away, so delay for a loop cycle.
I was having an oddity where a connection that was returned to the pool wasn’t really quite ready by the time I wanted it again, unless I let another iteration of a uv_loop occur.  It seems that the uv_poll_t structure would wipe out its data pointer if I called both uv_poll_stop & uv_poll_start in the same iteration.  Could just have been an oddity in my actual code, since I haven’t really quite created a test case for it.