As I was trying to find my way around building Ångstrom using OpenEmbedded, I stumbled upon as minimalistic systemd-image recipe for the Beaglebone. It boots up a usable system in less than 5 seconds.
Watch video on YouTube.
Home 
Beaglebone Beaglebone booting linux in less than 5 seconds
Beaglebone Beaglebone booting linux in less than 5 seconds
Beaglebone booting linux in less than 5 seconds
Radios
Hardware Lab
Software Lab
Antennas
Space
