[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):

 Here is the new version of test program:
 attachment:BwTest.3.cpp​
 Now it uses non-blocking mode and fully compatible with Linux.

 With this version, speed now is 52 KiB/s (instead of 80 KiB/s for previous
 version).
 Which is more close to what I observe with Tor.

 > Both inbound and outbound connection affected by this bug.

 That is strange.
 I see the same thing with the test program.
 But effect is different for Tor.
 Rechecked that again.

 One more confirmation of inbound/outbound difference is that in case of
 their equality, regular Windows users would see very slow upload speed in
 many cases.
 But this is not the case.

 Most likely, reproduction is still not accurate enough.

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Ticket URL: <https://trac.torproject.org/projects/tor/ticket/22798#comment:80>
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