Cmus does cache all the metadata — in the file named, unsurprisingly, «cache». You can restart cmus, and notice that the startup will be instant (even on an HDD

Cmus does cache all the metadata — in the file named, unsurprisingly, «cache». You can restart cmus, and notice that the startup will be instant (even on an HDD with 100+GiB of music). Re-adding the ~/music should work fine. There is also an `:update-cache` command which will update the metadata for all (changed) files, and remove the missing ones.