1713948 - Since Proton, secondary windows in high-workload environments lag often enough to be disruptive

Status: RESOLVED WORKSFORME

(Core :: Widget: Gtk, defect)

Description

[Anselm Schüler]

User Agent: Mozilla/5.0 (X11; Linux x86_64; rv:89.0) Gecko/20100101 Firefox/89.0

Steps to reproduce:

→ Opened a bunch of tabs with YouTube and Reddit (old) in them
→ Opened a second window
→ Continue browsing in second window

Actual results:

At some point, scrolling and typing in the address bar got unresponsive and stuttery for a few seconds at a time.

Expected results:

Normal performance, as is exhibited in the original window and when only one window is present.

Comment 1

[Anselm Schüler]

Attachment: Demonstration after submitting the bug

Please don’t judge for the opened videos and tabs.
Also, it seems that it only happens when a video is playing in the background.

Comment 2

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

The Bugbug bot thinks this bug should belong to the 'Core::Widget: Gtk' component, and is moving the bug to that component. Please revert this change in case you think the bot is wrong.

Comment 3

[Anselm Schüler]

Not fixed in 89.0.2

Comment 4

[:gerard-majax]

Obviously not something we repro. Do you still hit this? If you, I'd suggest recording a profile with the Firefox Profiler (https://profiler.firefox.com) and sharing it here.

Comment 5

[Anselm Schüler]

No

Comment 6

[Anselm Schüler]

(because I no longer use the same computer, Firefox installation method, websites, or operating system)