[tor-bugs] #22798 [Core Tor/Tor]: Windows relay is several times slower than Linux relay

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#22798: Windows relay is several times slower than Linux relay
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 Reporter:  Vort                           |          Owner:
     Type:  defect                         |         Status:  new
 Priority:  Medium                         |      Milestone:  Tor:
                                           |  unspecified
Component:  Core Tor/Tor                   |        Version:  Tor: 0.2.9.11
 Severity:  Normal                         |     Resolution:
 Keywords:  tor-relay performance windows  |  Actual Points:
Parent ID:                                 |         Points:  5
 Reviewer:                                 |        Sponsor:
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Comment (by Vort):

 I was wondering what is the key for good iPerf speed.
 Launched API Monitor and saw SO_SNDBUF with size = 212992.
 But it was coming not from iperf3.exe, but from cygwin1.dll.
 Digging into that library revealed that this part of code was recently
 disabled:
 https://github.com/mirror/newlib-
 cygwin/commit/609d2b22afc63d80029a4fe85e64b51c84ccae08

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Ticket URL: <https://trac.torproject.org/projects/tor/ticket/22798#comment:49>
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