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Re: [tor-bugs] #23719 [Applications/Tor Browser]: Make sure WebExtensions are spared from JIT disabling in higher security settings (Medium-High)
#23719: Make sure WebExtensions are spared from JIT disabling in higher security
settings (Medium-High)
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Reporter: cypherpunks | Owner: tbb-team
Type: defect | Status: needs_information
Priority: Medium | Milestone:
Component: Applications/Tor Browser | Version:
Severity: Major | Resolution:
Keywords: tbb-performance | Actual Points:
Parent ID: | Points:
Reviewer: | Sponsor:
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Comment (by cypherpunks_reply):
You can easily observe the increase in extension initialization time with
different security slider settings by disabling and enabling extensions in
about:addons. During this initialization time the browser UI is
unresponsive.
In normal usage (on my machine anyway) this delay mostly lengthens the
time during startup between Tor connecting and the browser window
appearing.
With the security slider set to standard, uBlock Origin with most of the
default filters enabled initializes after about 5 seconds of one cpu core
pegged at 100%. With the security slider set to safer, it takes 25
seconds.
I testd with Tor Browser 8.0, Windows 10, a quad-core 3 GHz CPU and plenty
of free RAM. Hardware acceleration is disabled and content processes are
reduced to 1 although raising them to 2 did not change the browser startup
delay or the unresponsive UI in the disable / enable scenario.
--
Ticket URL: <https://trac.torproject.org/projects/tor/ticket/23719#comment:10>
Tor Bug Tracker & Wiki <https://trac.torproject.org/>
The Tor Project: anonymity online
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