Working with a M1 Macbook Air, macos 12.4.
Anytime I open a new terminal window or just a new tab, it takes a really long time till I can type.
I have commented out my entire ~/.zshrc and when run
for i in $(seq 1 10); do /usr/bin/time $SHELL -i -c exit; done
directly in an open terminal window it says it finished in 0.1s.
So it must be something macos is doing before zsh is even starting.
PS: In the activity monitor I can only see a spike in kernel_task cpu usage when opening a new terminal
