Closed Bug 1414876 Opened 5 years ago Closed 5 years ago

Amazon high CPU consumption


(Core :: General, defect, P2)




Tracking Status
firefox57 --- wontfix
firefox58 --- affected


(Reporter: decoder, Unassigned)




(Keywords: regression)

[Tracking Requested - why for this release]:

A friend of mine reported that his Firefox 57 on Mac OSX consumes about 80% CPU on one core when opening the following page:

I reproduced the same thing on Firefox Nightly on Linux. We tested that both Chrome and Safari consume significantly less CPU on that page so I thought it might be worthwhile to investigate this further.
See Also: → 1404042
Tried to reproduce this on a MBP 2015. 

I managed to capture a profile when Firefox was taking up 100% of my CPU in Nightly -- not sure it shows anything interesting.

In general, Firefox takes up about 2-3% more CPU than Chrome after the page is loaded. 

I wasn't able to find a regression window, as the increase in CPU use seems to happen inconsistently. Hope the profile helps.
Hey Christian, could you please try to reproduce again and if you can, capture a profile for us?
Flags: needinfo?(choller)
Priority: -- → P2
See Also: → 1415691
possible dupe of bug 1415387.
I tried reproducing this on Fx59 and was unsuccessful. I suspect that the site changed though. I will try to confirm this with the original reporter. Nevertheless, the URL in comment 0 still seems a little slowish on Nightly. Maybe we should investigate if there is optimization potential.
Flags: needinfo?(choller)
This feels incomplete. If someone can repro or provide more details, feel free to reopen.
Closed: 5 years ago
Resolution: --- → INCOMPLETE
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