Heiko Voigt [off-list ref] writes:

Sorry about the late reply. I was not able to process emails until now.
Here are two patches that should help to improve the situation and batch
up some processing. This one is for repositories with submodules, so
that they do not iterate over the same submodule twice with the same
hash.

The second one will be the one people without submodules are interested
in.

Thanks.  Will take a look at later as I'm already deep in today's
integration cycle.  Very much appreciated.