Hack up stunnel to test a transport that uses a vanilla SSL handshake
Starting a week or two back, we've been getting reports that Tor in Iran is suddenly much slower: https://blog.torproject.org/blog/iran-blocks-tor-tor-releases-same-day-fix#comment-12115
It's not clear whether the slowness comes from the Tor network or from some external factor. But it's reasonable to imagine that one day in some situation it will come from some external factor.
We should come up with a plan for how to compare speeds, and then try to generalize them so users in these situations can try them out for us to give us more facts.