1727370 - Higher power usage on gem.cbc.ca in Firefox than Chrome on macOS (2019 MBP 10.15)

Status: NEW

(Core :: Performance: General, defect)

Description

[Jeff Muizelaar [:jrmuizel]]

Intel Power Gadget shows periodic spikes of very high CPU usage. This doesn't happen in Chrome.

Comment 1

[Jeff Muizelaar [:jrmuizel]]

Here's a summary from powerLog:
FF:

Cumulative Package Energy_0 (Joules) = 88.443054
Cumulative Package Energy_0 (mWh) = 24.567515
Average Package Power_0 (Watt) = 8.443423

Cumulative IA Energy_0 (Joules) = 71.964600
Cumulative IA Energy_0 (mWh) = 19.990167
Average Package IA_0 (Watt) = 6.870269

Cumulative DRAM Energy_0 (Joules) = 16.274902
Cumulative DRAM Energy_0 (mWh) = 4.520806
Average Package DRAM_0 (Watt) = 1.553722

Chrome:

Cumulative Package Energy_0 (Joules) = 69.439392
Cumulative Package Energy_0 (mWh) = 19.288720
Average Package Power_0 (Watt) = 6.605145

Cumulative IA Energy_0 (Joules) = 52.812012
Cumulative IA Energy_0 (mWh) = 14.670003
Average Package IA_0 (Watt) = 5.023532

Cumulative DRAM Energy_0 (Joules) = 16.551453
Cumulative DRAM Energy_0 (mWh) = 4.597626
Average Package DRAM_0 (Watt) = 1.574391

Comment 2

[Jeff Muizelaar [:jrmuizel]]

The two hottest threads in main process are the WebRender Renderer thread and the socket thread spending a bunch of time in select()

Comment 3

[Julien Wajsberg [:julienw]]

Hey Jeff, do you still see this?
If yes, by chance, do you have a profile? Or maybe you intended to look at this yourself?
Thanks!