1928090 - Wiki page caused high CPU and RAM usage permanently

Status: UNCONFIRMED

(Core :: Performance, defect)

Description

[foxy]

User Agent: Mozilla/5.0 (Windows NT 6.1; Win64; x64; rv:109.0) Gecko/20100101 Firefox/115.0

Steps to reproduce:

Firefox 115.17 I opened a wiki page
https://en.wikipedia.org/wiki/Linear_interpolation

Actual results:

After some minutes I see high CPU and RAM usage in Firefox unexpectedly. Firefox Taskmanger pointed to the only loaded wiki page. I took a profile.
https://share.firefox.dev/4edmcQi

Expected results:

There should not be any noticable CPU usage or increasing RAM usage after website was fully loaded. Issue was not reproducable.

Comment 1

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

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

Comment 2

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

This bug was moved into the Performance component.

:fred.steiny, 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

[foxy]

Attachment: Firefox_about_support.txt

Comment 4

[foxy]

memory dump not available

Comment 5

[foxy]

Also editing large Wikipedia page took several seconds until available with high CPU usage

https://share.firefox.dev/3As76sn