1941746 - Frequent freezes due to GC

Status: RESOLVED WORKSFORME

(Core :: Performance, defect)

Description

[coolcat_the_best2]

User Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:133.0) Gecko/20100101 Firefox/133.0

Steps to reproduce:

I went and watched a video on Youtube. It's not specific to a certain video. It happens on all of them.

Actual results:

Every 10-20 seconds the website freezes and becomes unresponsive. The video keeps playing, but other things, like pausing, going back/forwards 5 seconds, scrubbing the timeline, opening the side menu and writing in the chatbox all don't work for a couple of seconds.

In task manager I see a large spike in CPU usage and in about:processes I see the same for the youtube tab.

When using the profiler (https://share.firefox.dev/4j9FmdL) I see that it's busy garbage collecting.

Expected results:

IMO Firefox should never be stuck doing GC for the 6 seconds that it did in the profile, especially if it happens multiple times per minute.

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

[Mayank Bansal]

The profile shows time in Cycle Collection.
Bug 1939295 looks very similar.

Comment 3

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

This bug was moved into the Performance component.

:coolcat_the_best2, 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 4

[coolcat_the_best2]

Attachment: memory-dump.json.gz

Here's a memory dump.

Comment 5

[coolcat_the_best2]

Attachment: memory-report-2.json.gz

Made another one on a video that froze more often

Comment 6

[Fabio]

What version are you using?
The bug 1939295 noted by Mayank Bansal comment was fixed in 134.0.1, so make sure tu use at least that version.

Comment 7

[coolcat_the_best2]

Attachment: about-support.txt

Here's the about:support data

Comment 8

[coolcat_the_best2]

I'll try 134.0.1 to see if the problem persists.

Comment 9

[coolcat_the_best2]

The problem seems to be fixed!