Would it be good to show:

  guestfish ><fs> commands

then the same commands on the same image in some
language binding.

---------------------

Reduce boot time:

(1) Create a qemu wrapper.
(2) Use -L <somedir> option.
(3) In <somedir> put just the ROMs actually needed to boot:
  bios.bin  linuxboot.bin  vapic.bin  vgabios-cirrus.bin

FUTURE: Identify which ROMs induce what amount of delay.
The four above give ~ 1 second delay.
gPXE adds a 4-5 second delay.
Another unknown ROM adds another 4-5 seconds. --> actually pxe-virtio.bin

Rewrite libguestfs-supermin-helper so:

(4) Avoids 512 byte reads.
(5) Avoids multiple globs on the same directory.