Hi Joel, Thanks for sharing the patch. I have a few questions based on a cursory first look.
> If a single listener is found, we signal only that backend. > Otherwise, we fall back to the existing broadcast behavior. The idea of not wanting to wake up all backends makes sense to me, but I don’t understand why we want this optimization only for the case where there is a single backend listening on a channel. Is there a pattern of usage in LISTEN/NOTIFY where users typically have either just one or several backends listening on a channel? If we are doing this optimization, why not maintain a list of backends for each channel, and only wake up those channels? Thanks, Rishu
