I noticed that it got slower than before to open new zsh session. I use zsh on tmux. I shorten the time to open new session with steps following.
Installed starship
I used to use oh-my-zsh with spaceship-prompt. I changed spaceship-prompt to starship.
Installed with Homeberw
brew install starship
And added init command to ~/.zshrc
# ~/.zshrc
eval "$(starship init zsh)"
Quit using Oh My Zsh
After I installed starship, I found it satisfies what I want. I want to see which git branch I’m on, which versions of language I’m using. Starship covered them.
Omit $(…) from .zshrc
To run commands in .zshrc is not very fast. For example, $(brew --prefix). It is not always very slow but some commands are slow. I expanded direct paths and hardcoded them.
Omit double quotations from .zshrc
I’m actually not sure what the reason is. But somehow PATH="...:$PATH" are sometimes slow. Probably because my $PATH is fat, so expanding them take long. I omit " as many as possible.
Modified .tmux.conf
When I started using tmux, I copied someone’s .tmux.conf. It worked well, so I just kept using it. But whenever I opened a new pane or window, it takes some time.
There was such a line in order to load shell configuration. Actually it was not necessary. Most times, I don’t update .zshrc, so I don’t need to load configuration each time.
I deleted this line.
set -g default-command "${SHELL} -l"
Conclusion
Hope it helps someone.