why is it based on the raspberry when it has so terrible network interface? literally a +6 year board with a cual core and a gigabit interface can do this for better.
Because the pi-hole is a dns server. So it doesn't need to filter all traffic. It just replies to dns requests. And you need a LOT of traffic to completely saturate a 100Mbit link with dns requests :)
IIRC the bus of the NIC is shared with USB which is USB (v2) which is 480 Mbps or about half of 1 Gbps. If you care about throughput, don't use the USB ports when you care about it. But either way, 100 Mbps is more than fine for a Pi-Hole. I'd worry more about any possible latency overhead.
mostly nitpicking, but it's not gigabit lan; the interface is limited by internal bus to 300Mbs
It doesn't matter if you dedicate it to this single use, you'll see more lag if it's also doing file serving stuff in the background for instance (also because of CPU use, not just networking)
