On Sun, Sep 1, 2013 at 11:05 PM, Nguyễn Thái Ngọc Duy <pclo...@gmail.com> wrote:
> Current code peaks into the transfered pack's header, if the number of
> objects is under a limit, unpack-objects is called to handle the rest,
> otherwise index-pack is. This patch makes fetch-pack use index-pack
> unconditionally, then turn objects loose and remove the pack at the
> end. unpack-objects is deprecated and may be removed in future.
> There are a few reasons for this:
> - down to two code paths to maintain regarding pack reading
> (sha1_file.c and index-pack.c). When .pack v4 comes, we don't need
> to duplicate work in index-pack and unpack-objects.
> - the number of objects should not be the only indicator for
> unpacking. If there are a few large objects in the pack, the pack
> should be kept anyway. Keeping the pack lets us examine the whole
> pack later and make a better decision.
> - by going through index-pack first, then unpack, we pay extra cost
> for completing a thin pack into a full one. But compared to fetch's
> total time, it should not be noticeable because unpack-objects is
> only called when the pack contains a small number of objects.
> - unpack-objects does not support streaming large blobs. Granted
> force_object_loose(), which is used by this patch, does not either.
> But it'll be easier to do so because sha1_file.c interface supports
> Signed-off-by: Nguyễn Thái Ngọc Duy <pclo...@gmail.com>
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