Set up benchmark to pull latest clients, and auto-benchmark, weekly?

[intel352]

It would be good to see benchmark over time. Could you set up the benchmark to pull in the latest available client versions, and benchmark, so we can see the performance change over time and across versions? On a weekly basis ideally.

Similarly, seeing performance changes across Go versions would also be handy.

EDIT: Additionally, the dashboard should show when the benchmark occurred, what version of each client was tested, and what version of Go this was run on.