I have multiple files of .zcompdump*.
.rw-r--r-- 47k myuser 13 Jul 10:02 .zcompdump
.rw-r--r-- 47k myuser 14 Jul 16:52 .zcompdump-MacBook Pro (2)-5.7.1
.rw-r--r-- 47k myuser 4 Jun 9:32 .zcompdump-MacBook Pro-5.7.1
.rw-r--r-- 36k myuser 3 Jul 11:07 .zcompdump.macbook-pro-2.lan.54221
Which one of them do zsh actually use? Can I clear out some of them or?
Because the compinit mechanism of zsh creates the filename depending on some environment variable, here $HOST.
It's safe to delete them, but they will be recreated unless you add -D to compinit line in your zsh config
https://github.com/wurmlab/oswitch/issues/41
They are used to speed up the completion mechanism.
You can delete them and let it recreate the one you need.