1917293 - High CPU usage on xiaohongshu.com, page slow warning

Status: NEW

(Core :: JavaScript Engine: JIT, defect, P3)

Description

[xjjzyx]

User Agent: Mozilla/5.0 (X11; Linux x86_64; rv:130.0) Gecko/20100101 Firefox/130.0

Steps to reproduce:

Open the URL https://www.xiaohongshu.com/explore/644e74c3000000001402557b?source=webshare&xsec_token=ABhQVcoPPVjzLNzZocmpsY6b00FohzMlrtg3X1UtPC1mM=&xsec_source=pc_share .

Actual results:

Click a few times in the center of the screen with the left mouse button, the browser's CPU usage becomes higher, and the browser will prompt you that the page is slow and you should stop running the page.
Even if you stop running the page, other tab will be abnormal within one or two minutes,for example, the input box cannot input text. and then it basically returned to normal.

The URL is normal on chromium browser,the version is 128.0.6613.119 linux.

Comment 1

[xjjzyx]

(In reply to xjjzyx from comment #0)

User Agent: Mozilla/5.0 (X11; Linux x86_64; rv:130.0) Gecko/20100101 Firefox/130.0

Steps to reproduce:

Open the URL https://www.xiaohongshu.com/explore/644e74c3000000001402557b?source=webshare&xsec_token=ABhQVcoPPVjzLNzZocmpsY6b00FohzMlrtg3X1UtPC1mM=&xsec_source=pc_share .

Actual results:

Click a few times in the center of the screen with the left mouse button, the browser's CPU usage becomes higher, and the browser will prompt you that the page is slow and you should stop running the page.
Even if you stop running the page, other tab will be abnormal within one or two minutes,for example, the input box cannot input text. and then it basically returned to normal.

The URL is normal on chromium browser,the version is 128.0.6613.119 linux.

A more precise description,if browser prompt you that the page is slow and you should stop running the page and you don't stop the page running,the other tab input box cannot input text long long time, if you stop running the page,the other tab input box should be able to enter text a few seconds.

Comment 2

[Francesco Lodolo [:flod]]

The page works correctly for me on Nightly and macOS.

Have you tried in Troubleshoot Mode?
https://support.mozilla.org/en-US/kb/troubleshoot-extensions-themes-to-fix-problems#w_start-firefox-in-troubleshoot-mode

If it still doesn't work, try taking a profile and share it in this bug.
https://profiler.firefox.com/

Comment 3

[xjjzyx]

Attachment: Firefox 2024-09-07 15.58 profile.json.gz

Comment 4

[xjjzyx]

Attachment: Firefox 2024-09-07 15.52 profile.json.gz

Comment 5

[xjjzyx]

(In reply to Francesco Lodolo [:flod] from comment #2)

The page works correctly for me on Nightly and macOS.

Have you tried in Troubleshoot Mode?
https://support.mozilla.org/en-US/kb/troubleshoot-extensions-themes-to-fix-problems#w_start-firefox-in-troubleshoot-mode

If it still doesn't work, try taking a profile and share it in this bug.
https://profiler.firefox.com/

In "Troubleshoot Mode" still have the problem.I upload two attachments.

For Mac Nightly, the following page may be of reference value.
https://bugzilla.mozilla.org/show_bug.cgi?id=1869680

Comment 6

[Francesco Lodolo [:flod]]

Trying to move to Performances for investigation.

Comment 7

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

This bug was moved into the Performance component.

:xjjzyx, 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 8

[xjjzyx]

Attachment: memory-report.json.gz

Comment 9

[xjjzyx]

Attachment: about.support.txt

Comment 10

[xjjzyx]

(In reply to BugBot [:suhaib / :marco/ :calixte] from comment #7)

This bug was moved into the Performance component.

:xjjzyx, 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.

I upload two attachments,and the link is https://share.firefox.dev/4dUfmQh .

Comment 11

[xjjzyx]

This BUG seems to have some triggering conditions. It is likely that the browser will be accessed normally after restarting when the memory usage is not high and there are not many tabs.
The most likely triggering condition found so far is to press Crtr+Shift+r when the page is normal, which will basically trigger this BUG.

Comment 12

[Bas Schouten (:bas.schouten)]

We seem to be spending a lot of time in a few jitted functions. Chrome seems to be spending significantly less here. While I cannot locally reproduce an actual hang I can easily see the long running functions in the profile.

The Performance Impact Calculator has determined this bug's performance impact to be low. If you'd like to request re-triage, you can reset the Performance Impact flag to "?" or needinfo the triage sheriff.

Platforms: [x] Windows [x] macOS [x] Linux [x] Android
Impact on site: Causes noticeable jank
Websites affected: Rare
[x] Able to reproduce locally