DrDr cycle time, since run 50000 (ie, about the last 6000 runs, or 2 years):

A few interesting points to note: ~51500, when we started building Racket CS in DrDr as well, ~55100 when it switched to the CS build as the main build

And here’s the last 100 runs, where you can sort-of see the reduction in variance for the past 10, since @mflatt fixed a thread system bug: