First thing I noticed is that when I open uivonim I have nvim running at 100% CPU.

The first thing that jumped is that it spent a lot of time in build_stl_str_hl, the function that renders the statusline. I disabled the code in my config doing that, and the CPU usage dropped to ~70-80%, so any vimscript for the statusline needs to be disabled.

After inspection, it seems that neovim is doing A LOT of win_update() even though I'm sitting still and touching nothing. When there isn't any user input, neovim shouldn't be doing anything! Maybe is there something in uivonim continuously pinging neovim? Here are a few backtraces from interrupting the running process at random moments: