Built from source on a Pi 5 and... it's a bit sluggish. :(
So I followed the instructions here: https://zed.dev/docs/development/linux
I built on a Pi 5 with 4GB ... and that isn't quite enough. Plus, the default swap file is a mere 200MB, so that needs to be fixed; I _believe_ it ran a bit past 4GB of swap during build/installation. I was using an 8GB swap file in the end.
(Short story on the swap file on the Pi is, edit "/etc/dphys-swapfile" and then "sudo systemctl restart dphys-swapfile", which _may_ give you a bigger swap file without rebooting... unless it's using too much, in which case it'll give an error and you will need to reboot!).
I needed to install the "vulkan-tools" package to give me the vulkaninfo command which told me I didn't have any drivers installed. I then needed to install "mesa-vulkan-drivers" and then everything worked.
"cargo run" was using about 80% CPU... and felt sluggish. I _presume_ that that is executing within some kind of debugging environment (I have absolutely no experience with Rust), and so thought I'd do a full install in the hope that would improve things.
So I ran the "/script/install-linux" script... and it recompiled everything again (I think?) and finally installed. It now only uses about 20% CPU whilst running... but still seems kind of sluggish!
In both cases the window seems detatched from the Zed window... but I guess that's something to do with Openbox or the way it's configured on Raspberry Pi OS. Or something.
Anyway, was a little disappointed at it as I thought that leveraging the GPU might actually mean it ran better on the Pi. Maybe it will in time.