Comment by xlii

Dunno.

I have 90 lines zsh config with 3 plugins (compinit, vcs-info, edit-command-line) and startup-exit sequence takes 0.32s.

You learn very quickly where the lags come though when you work on a big old repository (I learned this on Emacs source code) where getting current branch for jujutsu takes ~5 second. Git is faster in this regard but it still is ~0.3s

I'm not fan of starship (I don't use fancy command line variables in general) but many of those issues can be dealt with awesome bkt caching utility [0]. Instead of live reading just let bkt cache it with long TTL with eager async refreshes. My guess is that Starship does exactly that.

[0]: https://github.com/dimo414/bkt