Performance Regression: After update to FireFox 18 permanent high CPU load
After the last update FireFox started to continuously eat a whole CPU on my 2-core laptop. My usage pattern (regarding browsed sites and/or activated plugins) has not changed, but I must confess that I'm a heavy user of plugins.
I suspect the problem may arise from a changed performance behaviour of a plugin due to the new JS engine of FF18, but how can I easily trace this problem further down. I.e. is there a way to inspect the collected performance data of firefox (activated)?
I use FF always with many tabs opened, min 100, sometimes up to 300+. After Updating FF17 to FF18 I've recognized a much more higher CPU-usage.
This issue doesn't occur as long as there are just a few tabs opened, or it doesnt' be of any consequence at least. The CPU-load of FF18 gets higher with each opened tab. When you close the tabs, the CPU-usage also gets normal. There is nearly no Flash-content and just few JS working on the websites (thanks to NoScript and ABP).
The System: i5-CPU, 16GB RAM, Win7 x64
FF17.01: CPU-load 1.0% average at 300 tabs
FF18.01: CPU-load 10.0% average at 300 tabs FF18.01: CPU-load 5.0% average at 150 tabs FF18.01: CPU-load 3.3% average at 100 tabs
A fresh install and disabling all addons (even in Safemode) didn't fix the problem. It seems, that FF is permanetly doing something with the tabs to being able to speedup on user-action. It's all good, as long as there are just a few tabs opened, but it's getting worse with each further opened tab.
I've opened a bug-ticket at https://bugzilla.mozilla.org/show_bug.cgi?id=832864
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Paulhi Paul,
I believe an issue like that needs to be done onsite and not via a forum
as it probably requires doing lots of checks/tests
my suggestion would be to get a PI consultant expert with basis experience onsite or do it via OSS with SAP
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