Re: More build times

[Stefan Monnier]

> Ah, thanks!  With --first-parent, I seem to be getting the state I'm
> looking for (I think).  I've now re-started the benchmarking thing, so
> in a week we should know whether that makes the graph smoother.  😅

`--first-parent` will probably avoid the commits that are actually on
`emacs-28`, because I think we do these commits "correctly", but I'm not
sure it'll be reliable enough in general.

`git bisect` needs to solve the same problem, so maybe we should look at
how it does it.


        Stefan