(This is just a me too response, I can't help with the capture part ;))
My experience is less extreme. But it does feel like firefox became
sluggish around version 15.0.
Firefox is normally around 1% cpu, while I have on average 4 tabs
open. But browsing to some websites trigger my fan to speed up, which
it didn't before, and they seem to be loading slower then before
15.0...
Setup:
openSUSE 12.1 x86_64
Intel(R) Core(TM)2 Quad CPU Q9550 @ 2.83GHz, 4GB memory.
On Tue, Oct 30, 2012 at 7:40 PM, Carl Hartung
Environment:
openSUSE 11.4 x86_64, all updates 2.0 GHz T5800 Core2Duo w/ 4 GB RAM MozillaFirefox-16.0.2-45.1.x86_64
Hi All,
This and the past few versions of Firefox seem to constantly be 'working' on something in the background and consuming between 12% and 39% CPU when checked with top. It is enough additional work to trigger higher fan speeds, which is what brought the condition to my attention. It launches and stays fairly quiet, at maybe a steady 3% to 6% CPU, then gradually through the hours just gets 'busier.' AFAIK, it really shouldn't be doing any work unless I'm actually browsing, since my 'home page' is a simple hand-edited .html local document.
What is the best way to capture a 'profile' of this activity to see where the additional load is coming from?
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