Is Virtual Desktop Streamer supposed to use so much CPU even when not connected and doing anything?

I got a Quest 3 recently after having to give up my Quest 2 a year ago and I'm noticing that VD is using a lot of CPU power even when it's not actually doing anything. Is it encoding stuff even when there's nothing to send it to or what?

I always have to close it when doing flat space stuff because it causes some slow down in games that already don't run great (like arma 3).