[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
-------------------------------------+-----------------------------------
 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
-------------------------------------+-----------------------------------

Comment (by cypherpunks):

 cypherpunks,
 {{{
 Windows Registry Editor Version 5.00

 [HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\services\AFD\Parameters]
 "DefaultReceiveWindow"=dword:00200000
 "DefaultSendWindow"=dword:00200000
 }}}
 Can you check this registry tweak? (for test purpose only, not sure about
 DefaultSendWindow and values)

 https://docs.microsoft.com/en-us/previous-versions//bb726981(v=technet.10)
 >Default: 4096/8192/8192

 Linux
 >net.core.rmem_max > 128K

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Ticket URL: <https://trac.torproject.org/projects/tor/ticket/31971#comment:21>
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