[tor-bugs] #31971 [Circumvention/Snowflake]: Snowflake is *consistently* extremely slow when using the Windows build

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#31971: Snowflake is *consistently* extremely slow when using the Windows build
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 Reporter:  cypherpunks              |          Owner:  cohosh
     Type:  defect                   |         Status:  needs_information
 Priority:  Medium                   |      Milestone:
Component:  Circumvention/Snowflake  |        Version:
 Severity:  Normal                   |     Resolution:
 Keywords:                           |  Actual Points:  .5
Parent ID:                           |         Points:  3
 Reviewer:                           |        Sponsor:  Sponsor28
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Comment (by cypherpunks):

 > I looked at netstat statistics for UDP sockets on my windows machine and
 wasn't seeing any packet loss at the socket level (as suggested by the
 comment above on AFD Parameters)

 https://social.technet.microsoft.com/Forums/windowsserver/en-
 US/35f79821-7ab5-4335-89d5-cec58fa31d33/detecting-the-amount-of-udp-
 packet-loss

 (2008 year):

 >Netstat displays the statistics from the transport layer. Winsock layer
 sits on top of the transport layer. Datagrams may be dropped at various
 layers within the networking stack. The netstat statistics do not account
 for datagram drops happening at Winsock layer due to exceeding the socket
 receive buffer limit.

 >Unfortunately, there’s no tool currently that shows Winsock layer
 datagram drop statistics. The closest thing on Vista and later is Winsock
 ETW tracing which would log a trace entry for each drop. Disadvantage of
 the ETW tracing that only the support personal can convert it to readable
 format (and this is for internal use only).

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Ticket URL: <https://trac.torproject.org/projects/tor/ticket/31971#comment:32>
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