To get this branch, use:
bzr branch
http://gegoxaren.bato24.eu/bzr/brz/remove-bazaar
(jameinel) Change ``bzrlib.transform.build_tree`` to pass the sha1 of newly
created files. This avoids re-hashing content on the next 'bzr st'. Saving
~30s on a gcc-sized tree. (John A Meinel)