[tor-bugs] #32938 [Circumvention/Snowflake]: Have a way to test throughput of snowflake proxy

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#32938: Have a way to test throughput of snowflake proxy
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 Reporter:  cohosh                               |          Owner:  cohosh
     Type:  enhancement                          |         Status:
                                                 |  needs_review
 Priority:  Medium                               |      Milestone:
Component:  Circumvention/Snowflake              |        Version:
 Severity:  Normal                               |     Resolution:
 Keywords:  snowflake-webextension, ux-team,     |  Actual Points:  3
  anti-censorship-roadmap-2020Q1                 |
Parent ID:  #31109                               |         Points:  5
 Reviewer:                                       |        Sponsor:
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Changes (by cohosh):

 * status:  assigned => needs_review


Comment:

 Okay this is ready for a partial review. This only implements the
 throughput test for proxy-go and right now doesn't do anything with the
 results except log them.

 Here's the changes to proxy-go:
 https://github.com/cohosh/snowflake/pull/19

 And the changes to bridgestrap, which I'm using for the probe point:
 https://dip.torproject.org/cohosh/bridgestrap/merge_requests/1

 === To test locally ===
 Start the probe point: `./bridgestrap -addr :8888`
 Start a proxy: `./proxy-go -probe http://localhost:8888`

 === Notes ===

 - The reported latencies are quite high, not sure whether this is a result
 of the webrtc library or if the latency calculation is too slow because of
 locks and the select call

 - We have the same concerns as #31874 with rate limiting and preventing
 abuse

--
Ticket URL: <https://trac.torproject.org/projects/tor/ticket/32938#comment:9>
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