1856617 - terrible performance on https://arc.net/

Status: RESOLVED DUPLICATE of bug 1820318

(Core :: Graphics, defect)

Description

[Lazy Monkey]

User Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:109.0) Gecko/20100101 Firefox/118.0

Steps to reproduce:

I loaded the site:
https://arc.net/

Actual results:

the performance on firefox is terrible (slow scrolling)

Expected results:

it should be faster like con chrome (scroll is much better than firefox)

Comment 1

[Simona Badau, Desktop QA]

I can't reproduce the mentioned scrolling issues. I'm not seeing differences in scrolling behavior when using the latest Nightly 120 compared to Chrome - tried on both Windows 10 and macOS 11.7.

Reporter, please can you confirm whether you reproduce this issue using Firefox in safe mode or with a new profile?
http://support.mozilla.org/en-US/kb/troubleshoot-firefox-issues-using-safe-mode
http://support.mozilla.org/en-US/kb/profile-manager-create-and-remove-firefox-profiles

Comment 2

[BugBot [:suhaib / :marco/ :calixte]]

This bug was moved into the Performance component.

:lazymonkey, could you make sure the following information is on this bug?

• For slowness or high CPU usage, capture a profile with http://profiler.firefox.com/, upload it and share the link here.
• For memory usage issues, capture a memory dump from about:memory and attach it to this bug.
• Troubleshooting information: Go to about:support, click "Copy raw data to clipboard", paste it into a file, save it, and attach the file here.

If the requested information is already in the bug, please confirm it is recent.

Thank you.

Comment 3

[Mayank Bansal]

I can repro. Just opening the page makes the whole browser basically unusable. See profile : https://share.firefox.dev/3Sl4ZfX
Moving to gfx based on the 2s composite times on the render thread

Comment 4

[Mayank Bansal]

Attachment: about:support

Comment 5

[Mayank Bansal]

I get the following in gfx-log :

(#0) Error Handling webrender error 6
(#1) GP+[GFX1-]: Hw video swapchain present is slow

and if I set media.wmf.vp9.enabled = false , the page improves. Instead of all UI operations just freezing, i merely get janky scrolling.

In Windows Manager, the Video Codec 1 use is 100%.

Marking dupe of bug 1820318