I was already able to deploy it on my Raspberry PI 4 without any issues. It was using a lot of CPU when joining large rooms, but now it seems to have calmed down and it's using 1-2% CPU, which is very reasonable. In comparison, home assistant runs at around 2-3% idle, and lemmy fluctuates between 4% and 10%.
Thanks for bringing this up, this is great! It's also written in Rust, and I love Rust, so I might contribute this summer. I'll add it to my list of potential project to contribute to, along with Lemmy.
The cloudflare protection of their main instance is breaking federation right now, which is a bit annoying. I hope this will be resolved soon.