~bzr-pqm/bzr/bzr.dev

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Lift Branch.set_stacked_on_url up from BzrBranch7.

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Internals

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* ``Branch`` now implements ``set_stacked_on_url`` in the base class as

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the implementation is generic and should impact foreign formats. This

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helps performance for ``RemoteBranch`` push operations to new stacked

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branches. (Robert Collins, Andrew Bennetts)

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* ``BtreeIndex._spill_mem_keys_to_disk()`` now generates disk index with

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optmizations turned off. This only has effect when processing > 100,000

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keys during something like ``bzr pack``. (John Arbash Meinel)