I’m using vim+Powershell core on Windows Terminal. I guess the OS is the problem then? gvim is very slightly faster but still very slow and laggy unfortunately.
edit: Also, my vimrc is already pretty lightweight since I only started using it a week ago lol. When I use vim for editing latex files there doesn’t seem to be an issue, which is why I was thinking that it is probably the julia-vim package that is slowing Vim down.