[tor-qa] Tor Browser 4.5a5 is ready for testing

[Katya Titov]

Katya Titov:
> Katya Titov:
>> Mike Perry:
>>> Tor Browser 4.5a5 is available at:
>>> https://people.torproject.org/~mikeperry/builds/4.5a5-build6/
>>> 
>>> This release will be the last alpha in the 4.5 series. We hope to
>>> release 4.5-stable in mid-April.
>> 
>> This is my first look at the 4.5 series ...
> 
> [...]
> 
>> Other regular tests all seem OK and it works with Torsocks. Nice
>> job!
> 
> Hmmm.
> 
> Firefox seems to be using quite a bit of CPU. CPU usage is
> consistently 10-20% and there are about 100-200 more context switches
> per second than when using TBB 4.0.6. vmstat output attached. FF
> version is 31.6.0 in both, OS is Debian 7.8, processor is Intel(R)
> Pentium(R) CPU B950 @ 2.10GHz, system has 4GB of RAM and generally
> doesn't swap.
> 
> Nothing else was happening on the box at the time, and stats were
> generated a few minutes after TBB had started in each case. I haven't
> used earlier versions in the 4.5 series so I can't compare this to
> older releases.
> 
> Please let me know what other information would be helpful.

This was consistently reproducible for most of the last 24 hours but
has now stopped. When it stopped I noted that HTTPS-Everywhere and
NoScript had been updated, and a restart confirmed the new versions
(5.0.1 and 2.6.9.20 respectively). Maybe the update was the cause of
the activity? Is this auto-updating of add-ons expected?

-- 
kat