"bzr push" transfering 15MB to commit a 400-lines patch?

[Stefan Monnier]

I recently started to pay more attention to that transfer size info
displayed during transfers and noticed that sometimes a lot more data
gets transfered than what I'd expect.  E.g. I just pushed (actually
via "commit" on a bound branch) a 400-lines patch (to 5 files totalling
a max of 200kB) and Bzr told me it transfered more than 14MB of data
for that.  This was using a "bzr+ssh" transport with a "bzr.dev" at most
one month old.

Is that expected?  Is it a known problem?


        Stefan