True Alpine is pretty snappy. I don't like using it as muslc has given me headaches before. Arch is faster generally too but not as much. Maybe there's something with systemd stuff.

One could probably use VoidLinux or Gentoo with glibc I suppose if one might want leaner than arch but more heavier than arch

Although VoidLinux's iso size I think is larger than ArchLinux or something which doesn't make that much sense but I don't really know but both are good references to check out.