The only delay would be when performing name resoluition. A few ms isn't going to make one bit of difference to your DNS lookups, quite frankly. Once your device has performed the lookup, there will be no further delay. The short answer is no, this will not affect gaming on your PC, nor add any latency. To provide some further context:Okay, thanks. Well one of the websites I don't use very often is reporting I'm using an ad blocker so it must be doing something.
I am using a Pi 2W via Wifi, is there any point in getting a network port dongle? I do have one that has a USB-C connecter but it doesn't work with the Pi using a USB-C to micro sd converter, no power passing through.
I also don't suppose there's any point in adding the PS5 to Pi Hole, just things like computers, phones and tablets?
If I game on my PC will it add latency?
Your client (PC in this instance) needs to connect to gameserver1.com (just an example). It will send a DNS lookup query to your Pi, with Pi-hole listening for DNS requests. If Pi-hole doesn't have the record cached, it will go to your configured DNS forwarder and query it for the record instead. Once it receives a response, it forwards the response back to your client (PC). Your PC then makes a direct connection to whatever gameserver1.com resolved to. The Pi is no longer involved once your client (PC) knows what IP address to connect to.
To flow it:
Client > Pi-hole > Check Pi-hole cache, if no cached record, do lookup > Pi-hole sends DNS query to DNS forwarder > Pi-hole receives response from DNS forwarder > Pi-hole sends response back to client.
Client connects directly to the resolved IP.