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misskey-dev / misskey

🌎 A completely free and open interplanetary microblogging platform 🚀
https://misskey-hub.net/
GNU Affero General Public License v3.0
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Firefox-based browsers hanging completely for 6-8 seconds straight when loading Misskey #14364

Open temtemy opened 3 months ago

temtemy commented 3 months ago

💡 Summary

This bug first appeared in 2024.5.0. Can be seen even when logged out (haven't tested while logged in to one that has upgraded to 2024.5.0 or 2024.7.0 yet). The hanging (which also affects the UI of the browser, which is strange because e10s/multiprocess should've prevented this and only made it so that the Misskey tab is the only one hanging) can last up to 8 seconds straight before the browser can register any action from me again.

The hanging will only happen the first time you load the Misskey in a browser session. However since I close the browser often when I'm done with it, all this hanging can annoyingly add up over time.

Example URLs:

🥰 Expected Behavior

Loading any webpage of a Misskey 2024.5.0+ instance shouldn't hang at all in a new-enough PC that is using Firefox

🤬 Actual Behavior

Loading any webpage of a Misskey 2024.5.0+ instance (I usually do the /tags section since I like to look at other instances' hashtag timelines for the most up-to-date info) hangs Firefox, even with a beefy PC like mine as you can see below.

📝 Steps to Reproduce

No response

💻 Frontend Environment

* Model and OS of the device(s): ASUS laptop with Ryzen 7 4800H, Windows 11 23H2 x64
* Browser: Firefox 128.0.3
* Server URL: mk.udongein.reisen
* Misskey: 2024.7.0

🛰 Backend Environment (for server admin)

No response

Do you want to address this bug yourself?

temtemy commented 3 months ago

Curiously I cannot see this issue in Sharkey 2024.5.1 (via https://shonk.social/tags/Misskey). @dakkar, have you encountered this issue before and fixed it on your own end?

temtemy commented 3 months ago

Anyway if you need some sort of "control" instance to compare against you can use mine which is based on 2024.3.1 (and don't worry I backported the security fix that came with 2024.5.0): https://makai.chaotic.ninja/tags/Misskey

dakkar commented 3 months ago

I have just now tested Firefox 128.0.3 linux x64, both of those URLs load fine, no lockup of any kind

this is the profiler trace fo misskey.io https://share.firefox.dev/3A3Ul6H

this is the profiler trace for mk.udongein.reisen https://share.firefox.dev/4d9PRKD

temtemy commented 3 months ago

Well I guess it could be a system issue too. Though still strange that it doesn't lock-up Edge, or that 2024.3.1 and below doesn't lock-up my Firefox.

Profiler trace, FWIW:

temtemy commented 3 months ago

I've also created a fresh profile to rule out any about:config changes I may have made as well as any possible offending extensions (even though it's just uBlock Origin) and I can still see the lock-up.

dakkar commented 3 months ago

both your profiles shows 100% CPU for several seconds doing font rendering

I suspect you have some very weird fonts installed on your machine… or the Tabler iconfont is somehow confusing your Firefox (Sharkey uses the Phosphor iconfont, it's the main font-related difference from Misskey)

CAT5NEKO commented 3 months ago

https://github.com/tabler/tabler-icons/issues/476

When running Firefox Nightly, the issue mentioned in the above doesn't occur as TablerIcon is not loaded, so the freezing problem described in the issue does not happen. However, when modifying the Firefox prefs.js to load an OTL non-compliant file for testing, the freezing issue reappeared. This suggests that the problem might be related to the Icon.

Personally, I believe that considering alternative icons could be a viable solution to avoid the Firefox freezing issue.

tai-cha commented 3 months ago

May related: #10371 , #14271

saschanaz commented 3 months ago

I also have this problem on my Nightly. I wanted to investigate but unfortunately had no time. It's weird:

  1. If you open a different Misskey website, it doesn't occur even if the misskey version is same
  2. If you start with a different Firefox profile (firefox -profile (test directory) on terminal, it doesn't occur on anywhere at all

Should probably be some parent process thing, for now I'll report on Bugzilla too.

saschanaz commented 3 months ago

There it is: https://bugzilla.mozilla.org/show_bug.cgi?id=1912660

tai-cha commented 3 months ago

There it is: https://bugzilla.mozilla.org/show_bug.cgi?id=1912660

Note: Labeled needinfo? in bugzilla.

saschanaz commented 3 months ago

Note: Labeled needinfo? in bugzilla.

We just had a company-wide travel week which caused inactivity, sorry 🙏. I'm back to the investigation.