1532115 - [arm64-windows] Idle battery consumption on imgur is almost 2x higher than Edge

Status: NEW

(Core :: Performance, defect, P3)

Description

[Denis Palmeiro [:denispal]]

Just sitting idle on imgur.com, Firefox consumes almost 2x more battery than Edge does:

Firefox: 12% battery, 7270mwh
Edge: 7% battery, 4250mwh

Here is a gecko profile, although I'm not sure it's complete because I can't seem to capture any non default threads on arm64-windows: https://perfht.ml/2IO2LUX

Comment 1

[Denis Palmeiro [:denispal]]

One thing that stands out right away from a trace file is that Edge has less than half as many context switches as Firefox does. This is perhaps just an issue with having too many working threads.

Edge: 1, Thread: CSwitch, , 135039
Firefox: 3, Thread: CSwitch, , 303290

Comment 2

[Vicky Chin [:vchin]]

When you get a chance, can you see whether double buffering has improved this at all?

Comment 3

[Denis Palmeiro [:denispal]]

sparky is doing these tests for double buffering.

Comment 4

[Kim Moir [:kmoir] ET]

triaging

Denis any update on tests as mentioned in above comments?

Comment 5

[Denis Palmeiro [:denispal]]

I honestly don't remember what the outcome was.