Incorrect bzrlib usage or a memory leak?

[Martin Pool]

Just in case other people on this list are curious, John did an
awesome analysis in
<https://answers.launchpad.net/bzr/+question/173096>
<http://imagebin.org/177384> showing that the memory does grow, but it
plateaus, and the growth can reasonably be explained by the increasing
size of the tree as you go forward through history, and caches that
grow to a bounded size.

Martin