I've been using Parsec on my local network for several months now and I see absolutely no latency whatsoever. GFN and any streaming provider gives me a very small but noticeable lag in shooters, but Parsec on my home network is genuinely perfect. I game from my Macbook and I play whatever I want from my homeserver (3090 and 4060) in another room. Both my Macbook and computer are wired of course. Important to note is that I needed a dummy HDMI on my computer for a 'true' screen, any kind of virtual screened caused it to lag hard, probably because the game or stream ran without any kind of hardware acceleration.
I have to say, I love the way Parsec works and allows you to use your whole library (since it doesn't stream the game, but it streams your whole desktop). But if there is ever a service that allows you to get the same thing including remote servers (since I travel), I would probably switch.
I'm not a professional myself either, but the things I would check are:
- Make sure you run hardware acceleration, you can see if this is applied after opening a connection and checking the details. Without acceleration it will be terrible. This can either be as simple as enabling it or possibly you need the monitor below.
- Make sure a monitor is plugged in (there might be a way around this, but I just bought a $4 HDMI dummy instead of trying to figure out how to do this the software way)
I have to say, I love the way Parsec works and allows you to use your whole library (since it doesn't stream the game, but it streams your whole desktop). But if there is ever a service that allows you to get the same thing including remote servers (since I travel), I would probably switch.