Today I changed the ["Time to download files over Tor" graph](https://metrics.torproject.org/torperf.html) to include version 3 onion service measurements. By chance, I also looked at the [onion server measurements](https://metrics.torproject.org/torperf.html?start=2020-02-25&end=2020-05-25&server=onion&filesize=50kb) and found that the onion service measurements made by op-nl2, op-us2, and op-hk2 have gotten much slower as compared to their op-nl, op-us, and op-hk predecessors. I'm 95% certain that this is not a bug in the graphs. My current best guess is that something in `tor` has changed. I'd like to set up a small number of experimental OnionPerf instances all in the same place but with different `tor` versions. Any suggestions on locations (Amsterdam, Florida, Hong Kong) or `tor` versions? This is also relevant to Sponsor 59 in order to make sure that our current measurements are going to be a baseline for future experiments. Classifying as potential defect.