neovim screen lagging when switching mode from insert to normal

Question

I'm running neovim + coc + tmux in iTerm2. Sometimes I'm seeing the screen lag a lot, which leads to overlap content, such as the selected content and the status line...

Not sure what's cause the issue, can you please help me understand how to debug this?

Answer 1

adding a

set -s escape-time 0

to my .tmux.conf file fixed the delay problem when hitting the esc key