@nikomatsakis fyi: nll dashboard on perf is now going to be empty; we merged NLL into 2015 edition so there's no "base case" anymore. The page hasn't been removed yet because that's more work than I had time for, but we are no longer collecting data.
This was also partially brought on by a desire to reduce the benchmark time (we already have a long queue)
we may want to repurpose the NLL dashboard to measure non-migrate mode, perhaps
(though I suspect there aren't going to be the same sort of performance issues there that we saw for the initial NLL development)
At some point I'd like to start measuring polonius :)
But we're not there yet