[tor-bugs] #19910 [Applications/Tor Browser]: Rip out optimistic data socks handshake variant (#3875)

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#19910: Rip out optimistic data socks handshake variant (#3875)
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 Reporter:  cypherpunks               |          Owner:  tbb-team
     Type:  defect                    |         Status:  new
 Priority:  Medium                    |      Milestone:
Component:  Applications/Tor Browser  |        Version:
 Severity:  Normal                    |     Resolution:
 Keywords:  TorBrowserTeam201801      |  Actual Points:
Parent ID:                            |         Points:
 Reviewer:                            |        Sponsor:
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Comment (by arthuredelstein):

 Replying to [comment:15 arthuredelstein]:
 > Replying to [comment:13 arma]:
 >
 > > I think it would be worth exploring whether we can do the same
 behavior in a smarter way from the browser though -- the feature
 essentially removes a round-trip across the Tor network from page loads.
 >
 > Instead of implementing a patch in the browser, I wonder if we could
 patch the tor proxy instead with roughly the same speedup.

 I see now this approach was discussed in #3875 and also proposed in #5915.
 There was a proposed patch for tor here:
 https://trac.torproject.org/projects/tor/attachment/ticket/3875/tor-
 optimistic-data.patch . I think it still looks like a possible solution
 but there are some concerns expressed about error messages which would
 need to be considered.

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Ticket URL: <https://trac.torproject.org/projects/tor/ticket/19910#comment:18>
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