`gs ls` is slow

First of all, thank you for this great tool, love it.

I wanted to reported that `gs ls` seems unnecessarily slow. On my M4 Pro, it takes almost half a second.
```sh
$ time gs ls
┏━■ branch1 ◀
┏━┻□ branch2 (!1669)
master
gs ls 0.16s user 0.21s system 86% cpu 0.421 total
```

Version 0.20.2