1499783 - Scrolling on the Google Pixel 3 store page is incredibly laggy

Status: RESOLVED INVALID

(Core :: Graphics: WebRender, defect, P3)

Description

[Trevor Rowbotham [:rowbot]]

STR:
1) Visit https://store.google.com/us/product/pixel_3
2) Scroll down

Scrolling on the page or switching tabs to and from the page is slow.

Profile: https://perfht.ml/2yov04P

Comment 1

[Trevor Rowbotham [:rowbot]]

Profile with webrender disabled: https://perfht.ml/2ykNQKg

Comment 2

[Jeff Muizelaar [:jrmuizel]]

(In reply to Trevor Rowbotham [:rowbot] from comment #0)
> STR:
> 1) Visit https://store.google.com/us/product/pixel_3
> 2) Scroll down
> 
> Scrolling on the page or switching tabs to and from the page is slow.
> 
> Profile: https://perfht.ml/2yov04P

I can't reproduce the problem being as bad as you see (it's still not great though). What hardware are you on? Can you reliably reproduce such a dramatic slowness?

Comment 3

[Trevor Rowbotham [:rowbot]]

Attachment: about_support.txt

Here is my about:support.

Yes, I can reliably reproduce the slowness.

Comment 4

[Trevor Rowbotham [:rowbot]]

Attachment: memory-report.json.gz

Memory usage for me seems to be abnormally high on this page too, Firefox is using about 4 GB.

Comment 5

[Trevor Rowbotham [:rowbot]]

After looking at this a little more, this seems to be a problem with video decoding as both Windows Task Manager and GPU-Z are reporting that my GPU is pegged at 100% in the video decode pipeline, so this might be media related.

Comment 6

[Trevor Rowbotham [:rowbot]]

Just tried in Edge and the same thing happens. So, my guess is that this is either a problem with DXVA2 or an Nvidia driver bug for my particular hardware. Any ideas on figuring out which one is at fault?

Comment 7

[Jeff Muizelaar [:jrmuizel]]

Trevor, does this still happen for you?

Comment 8

[Trevor Rowbotham [:rowbot]]

Hey Jeff,

Yes, I can still reproduce this. It seems to perform slightly better than it did 4 months ago, but still pretty terrible. Here is a new profile https://perfht.ml/2TIIW24. Let me know if I can provide you with anymore information.

CPU: Intel Core-i5 2500K
GPU: Geforce GTX 770 (driver version 418.81)
Resolution: 1920x1080@60Hz
RAM: 16 GB
OS: Win 10 x64
Latest Firefox Nightly

Comment 9

[Trevor Rowbotham [:rowbot]]

Just for comparisons sake here is another profile on my new machine https://perfht.ml/2THovCV. Performs pretty smoothly, though the profile shows some high composite and CONTENT_FRAME_TIMEs.

CPU: Intel Core-i7 9700K
GPU: Geforce RTX 2080 (driver version 417.71)
Resolution 2560x1440@144Hz
RAM: 16 GB
OS: Win 10 x64
Latest Firefox Nightly

Comment 10

[Nicolas Silva [:nical]]

It looks like the page has changed. We have a number of other performance bugs on file about pages with fancy scrolling effects so I'll close this one.