I installed Postgresql 9.6 on Windows (x64), using the default installer.
I did this on 2 almost identical machines. On the first machine making a connection to localhost (for example by using psql) is instant, while on the other machine it takes more than 10 seconds.
I even copied the entire directory of the first machine, to make sure there is no difference, but the problem persists. The services are the same, and already running when Windows starts.
What on earth could cause this delay on that one machine? Any way to identify what's going on?