In Nightly from 14/06/2017 Nightly CPU usage when activity stream has been quite high. Activity stream appears to be spinning constantly even when there are no new tabs and is doing so in the main Thread. Performance Profile in https://perf-html.io/public/a9aebd364eb21034302909213c83af28e065cce1/calltree/?thread=0 I am not sure if this a duplicate of bug 1341437 but disabling activity stream has calmed down my CPU a lot!
I have the similar situation when I visit website, the CPU usage is quite high and the cooling fan is buzzing all the time. In fact, it all starts to happen when I visit http://www.dealstaxi.com. I'm not sure about the problem, because it is not using flash at all.
Component: Activity Streams: General → Activity Streams: Newtab
:automatedtester, we have done a bunch of perf improvements since this bug was reported. Could you give this another shot and see if the issue still exists?
It doesnt appear to be happening anymore.
Status: NEW → RESOLVED
Last Resolved: 5 months ago
Resolution: --- → WORKSFORME
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