The CI build time continue to rise alarmingly

[David Cheney]

CI build times are now an average of 36 minutes. That means in a
typical 8 hour work day, assuming doing nothing other than landing
branches, less than 16 commits can be landed.

While bugs can be worked on and reviewed in parallel, landing is a
sequential action that blocks everyone, and given the landing bot is
batting less than 0.500, this limits the practical number of changes
that can be landed in a day, a sprint, a iteration, or a development
cycle.

I cannot make it any clearer than this, the speed of CI limits the
velocity of this team.

Dave