Phillip Wood [off-list ref] writes:

Jonathan is there any overlap between what this series is trying to do 
and your proposal for a batch command[1]? For example would extending 
this series to get blob sizes be useful to you?

Best Wishes

Phillip

[1] 
https://lore.kernel.org/git/20220207190320.2960362-1-jonathantanmy@google.com/ (local)

There is overlap, yes. I'm not sure of the best way to resolve it,
though. John mentions a substantial reduction ("roughly half") of Git
processes [1], and if they foresee needing to access things other than
object info and contents, it might be better to start with something
more extensible, like my proposal for a specific batch command. (If not,
they will encounter another increase in the number of processes.) If
they think that they can make do with this patch for the time being, I
think that's fine too: once this is merged (which will be earlier than
any extensible batch command, for sure), they (and anyone else who needs
batched object info and contents without the overhead of initializing
all the data structures in Git) can make use of this improvement.

As for getting blob sizes, I think that --batch-check can already give
it to us. If that is the case, the series is fine as-is (at least in
that aspect).

[1] https://lore.kernel.org/git/1b63164ad4d9ec6b5fa6f733b6095b2779298b36.1644251611.git.gitgitgadget@gmail.com/ (local)