Another good way to get things composted
is to simply dig a hole in the garden and put it all in
(be careful about weed seed heads and roots).
Even quite twiggy stuff breaks down over winter
and the volume reduces quickly.
We did this in our allotment -
we had a huge amount of growth
to get rid of
because we could not manage
the intensity of planting by the previous owner -
and dug several trenches.
OK it was hard work
but we packed in so much,
and by spring it was wonderful,
just wonderful earth.
Worth trying even on a small scale
if you lack space.