What is a low-end device in this context?

I think we need to talk to gmail here. Anyone have a gmail contact? What happens on this device if you modify the scrolling div to contain: paint?

We could decide to sacrifice LCD text for scrolling performance on low-end devices. That decision needs to be escalated, and I don't know (a) how we would detect "low-end" or (b) whether we can have different command line flags for different devices (I presume we can).

Assigning to chrishtr@ to manage the external discussions, or delegate.

With contain: paint we do promote the email list in M56, scrolling on the compositor and maintain LCD text. I have brought this up but as I understand there is some hesitation because  issue 648091  was not resolved in M55 so adding contain: paint to a composited scroller can break the rendering on high dpi devices running M55.

Even though we can composite the scrolling on this particular page, it seems bad that the main thread path is so expensive.

Also every hit test still has to do all of this work, and any time the app touches the DOM. So while we can paper over the scroll slowness with composited scrolling it doesn't fix the real issue.

I'm going to go ahead and close this. We are aware of several problem areas that
should help this situation, and various 2018 OKRs, but having a bug just for this
site is not adding extra value right now.