I've been daily driving Kubuntu for ages now (currently on 24.10), and I've noticed that updates take a while for seemingly no reason.
The downloads are slower than my internet is capable of, but they happen fast enough. It's just that some packages take longer than I would expect on the "unpacking" step.
For example, anytime there's a new kernel release or new headers, apt downloads the packages fast enough, but the unpacking takes time with seemingly no resource usage. No increased CPU load (for possible inflating of a compressed archive), no IOWAIT warnings, my NVMe disk shows very little throughput (and can handle much faster disk operations, like downloading games via Steam), stuff like that. The system seems to be at idle, and yet the unpacking of some packages just... takes a while.
It's not like it's a huge issue. It's only maybe an extra 30+ seconds, but it's got me wondering if there's anything I could do to improve it.
sudo apt clean
hasn't had any effect, and my Google searches are of people complaining of either slow download speeds or 30+ minute delays that end up being failing drives.
Anyone have ideas?
I think the example you're using is closer to emulation.
I'm not an expert by any means, most of my technology experience comes from hardware. But Proton isn't changing the Linux ecosystem, and the programs are still expecting a windows environment when they're run via Proton.
From what I recall, Linux and windows can both do the same stuff, they just have different names or different ways to ask for resources. And Proton receives the request for whatever and converts it to the Linux equivalent.
It's not nearly as bad as it was in the past, now that the graphics APIs are system agnostic.