[PATCH] baz2bzr: direct_merges performance bugfix

[David Allouche]

On Sun, 2005-10-16 at 20:00 +0200, David Allouche wrote:
> Attached is patch that rewrites the direct_merges function used by
> baz2bzr to
>       * avoid unneeded network round-trips (by a avoiding using "baz
>         ancestry-graph --immediate" unless absolutely needed)
>       * not rely on the New-Patches header of continuation revisions,
>         which have been historically unreliable
>       * incidentally fix the explosive memory usage problem
>       * use set operations instead of list operations
>       * use pybaz Patchlog.new_merges feature instead of reimplementing
>         it
> 
> I _think_ it is as correct as possible, but I might have missed some
> obscure aspect of the problem.

Indeed, I missed the fact that imports are not continuations and have no
ancestor. Fixed in the updated patch in attachment. 

Also, it occurred to me that the changes in direct_merge logic may cause
imports to be different, so maybe the namespace should be bumped as
well.
-- 
                                                            -- ddaa
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