[MERGE] Use a LRUCache in LocalTransport.clone

[Robert Collins]

On Mon, 2008-01-14 at 18:30 -0500, Aaron Bentley wrote:
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> Robert Collins wrote:
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> > If clone() is slow and affecting our recommended formats, lets fix that.
> > But lets not add complexity because it is affecting our legacy formats.
> 
> It is also affecting the find_branches set of APIs, as I mentioned in an
> earlier comment.

Oh, I missed that - sorry. In which case, I'm very interested in
tracking the root cause down. clone('segment') is the most common case
and should be trivial.

-Rob
-- 
GPG key available at: <http://www.robertcollins.net/keys.txt>.
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