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[tor-bugs] #19653 [Applications/Tor Browser]: Hardened tor browser huge memory usage

#19653: Hardened tor browser huge memory usage
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     Reporter:  martingale                |      Owner:  tbb-team
         Type:  defect                    |     Status:  new
     Priority:  Medium                    |  Milestone:
    Component:  Applications/Tor Browser  |    Version:
     Severity:  Major                     |   Keywords:
Actual Points:                            |  Parent ID:
       Points:                            |   Reviewer:
      Sponsor:                            |
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 I'm using Tor Browser 6.5a1-hardened (verified PGP signature) without
 modifications, security slider set to high. Simply opening the browser
 (via tor-browser/start-tor-browser.desktop) mallocs about 250 MB of RAM
 which jumps to over 600 MB of RAM when the "Welcome to Tor Browser" page
 loads. If I let it sit idle on the welcome page, RAM usage climbs at
 around 1 MB every 10 seconds. Hitting the refresh button grabs another ~10
 MB of ram every few clicks. The behavior is similar on all other web
 pages.

 When I use the stable 6.0.2 startup is much quicker and only uses around
 140 MB of RAM. Hitting the refresh button multiple times can temporarily
 increase RAM usage to around 155 MB but it seems to be freed periodically
 and never becomes unreasonable.

 I'm running debian (sid) gnu/linux 64-bit.

--
Ticket URL: <https://trac.torproject.org/projects/tor/ticket/19653>
Tor Bug Tracker & Wiki <https://trac.torproject.org/>
The Tor Project: anonymity online
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