[tor-bugs] #10192 [Pluggable transport]: websocket-server seems to be (very) slow

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#10192: websocket-server seems to be (very) slow
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 Reporter:  Aymeric              |          Owner:  asn
     Type:  defect               |         Status:  new
 Priority:  normal               |      Milestone:
Component:  Pluggable transport  |        Version:
 Keywords:                       |  Actual Points:
Parent ID:                       |         Points:
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 After multiple tests and iterations, here is the average behavior with
 tor1.bamsoftware.com with the following configuration:

 Browser (2 Mbps) --> 600kbps --> tor1 300 kbps --> Tor 2 Mbps --> ORDB
 (400/500 kbps) --> Tor 2 Mbps --> 2 Mbps --> Browser (2Mbps) (real:
 300kbps)

 Where ORDB is for now a small limited server relaying messages. (X
 bps)=internal processing time based on iterations of 500B blocks.

 It appears that tor1 can not handle more than 250/300 kbps, it can be seen
 too monitoring the WebSockets bufferedAmount on browser side.

 Apparently it's  not a bandwidth issue or an OR issue since I have tested
 tor1 as a normal OR (ie w/o websockets).

 I have tested too replacing tor1 by a router supporting websockets and the
 limitation disappears.

 So I am suspecting that websocket-server module is abnormally slow.

-- 
Ticket URL: <https://trac.torproject.org/projects/tor/ticket/10192>
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