The Bazaar team have been working on improving the performance of bzr
on the gcc-linaro tree.  Here's how long the steps take on my machine
with the current 2.4 development version:

Update tip before branching:
  bzr pull  20.4 s (no revisions)

Make the branch:
  bzr branch --hardlink 4.5 optspace  26.8 s

Do some work and commit it:
  ...change two files
  bzr status  1:05
  (again) bzr status  1.7 s
  bzr commit .  3.6 s

Push the changes up:
  bzr push lp:~michaelh1/gcc-linaro/optspace  3:47 ~9 MB (~40 kB/s
which is saturating my uplink)

Later, the merge master pulls the branch down and merges:
  bzr branch --no-tree lp:~michaelh1/gcc-linaro/optspace  36 s ~900 k
  bzr merge ../optspace  3:26

The bzr status and bzr commit are quite good.  I've asked them to look
into bzr merge.

-- Michael

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