I know that Qubes OS is built around compartmentalization, so I’m aware(as far as I can) of higher impact on machine resources, however, when my laptop is idle, dom0 eats between 2 and 5 percent of CPU(displayed on qui-domains short-info pop-up), when I watch 1080 youtube video(not even full-screen) with firefox and personal template(debian) that particular template eats 50-80% of the CPU. I don’t see any visual artifacts, however the laptop gets wild both by fan speed and heating. I use xps 13 with i7 and fresh KDE DE. I switched from manjaro and never had anything noticeable like that before.
Is this really the cost of compartmentalization or perhaps something doesn’t work well, how do I troubleshoot this kind of things?
Is there any tweaks I can use to somehow reduce the impact of heavy tasks on the CPU? Perhaps by switching something off, etc?