[tor-bugs] #23777 [Core Tor/Tor]: tor spends a lot of time in malloc/free

Tor Bug Tracker & Wiki blackhole at torproject.org
Sat Oct 7 02:54:33 UTC 2017


#23777: tor spends a lot of time in malloc/free
--------------------------+------------------------
 Reporter:  Hello71       |          Owner:  (none)
     Type:  enhancement   |         Status:  new
 Priority:  Medium        |      Milestone:
Component:  Core Tor/Tor  |        Version:
 Severity:  Normal        |     Resolution:
 Keywords:                |  Actual Points:
Parent ID:                |         Points:
 Reviewer:                |        Sponsor:
--------------------------+------------------------

Comment (by Hello71):

 compression pegs the CPU (of course), but consensus updates are pretty
 uncommon. malloc and free waste time I believe for every single packet
 forwarded, probably mainly because AFAICT there is no fast path that
 avoids memory allocation (or epoll waiting) in the case where the outgoing
 channel is free.

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Ticket URL: <https://trac.torproject.org/projects/tor/ticket/23777#comment:2>
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