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2603ba2286
The in-memory source stores its objects in a simple array that we grow as
needed. This has a couple of downsides:
- The object lookup is O(n). This doesn't matter in practice because
we only store a small number of objects.
- We don't have an easy way to iterate over all objects in
lexicographic order.
- We don't have an easy way to compute unique object ID prefixes.
Refactor the code to use an oidtree instead. This is the same data
structure used by our loose object source, and thus it means we get a
bunch of functionality for free.
Signed-off-by: Patrick Steinhardt <ps@pks.im>
Signed-off-by: Junio C Hamano <gitster@pobox.com>