Re: Marginal features

* Walter Landry:

> lightweight branches - Making it possible to branch from a project
> without having to lug all of the history around.  I think ArX and
> tla/baz are the only ones to do this.  Darcs' tag feature might
> support this somewhat, but I am not sure.

A local "darcs get" just links the history files, the main overhead is
the creation of a new working copy.  It's possible to create hard
links between two repositories after the fact, using "darcs optimze
--relink --sibling=OTHER-REPO".

Although the branch creation overhead is something line O(n log n) in
the number of changesets, it's superior to other systems because you
can share history data on parallel branches.