Re: [PATCH 00/20] Separate `ref_cache` into a separate module

On Mon, Mar 20, 2017 at 5:33 PM, Michael Haggerty [off-list ref] wrote:

I've completed a draft of an epic 48-patch series implementing all of
the above points on my GitHub fork [1] as branch
`wip/mmap-packed-refs`. It dramatically speeds up performance and
reduces memory usage for some tasks in repositories with very many
packed references.

Just curious, what sort of performance numbers on mainly what sort of
operations? I'd expect the fixed cost of e.g. `git log -1 >/dev/null`
to go down, which can take as long as a second on some repos with a
huge amount of refs, but anything else?