Powerlevel10k – a 10x faster fork of Powerlevel9k
reddit.com
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The classical way of running a dozen git commands gets really slow in complicated circumstances. I think previously you had to either limit displayed git info or update the prompt contents asynchronously to get a reasonable latency in a Zsh prompt.
Powerlevel10k also uses advanced ZSH. Explained in https://www.reddit.com/r/zsh/comments/b1xxuj/abusing_zsh_par....
There is also information on https://github.com/romkatv/powerlevel10k/ that probably didn't exist when you've discovered Powerlevel10k.