When you say unbearably slow, do you mean the actual DNS resolution, or the Admin interface?
An Rpi3, even a Rpi B or zero is plenty good enough for DNS queries! The Admin interface has been a bit of a bugbear for a while, but we are working on some massive improvements for the 3.0 release (coming soon™)
An Rpi3, even a Rpi B or zero is plenty good enough for DNS queries! The Admin interface has been a bit of a bugbear for a while, but we are working on some massive improvements for the 3.0 release (coming soon™)