Firefox v122 uses 10x more cpu only in one instance

Dashthechi — Sat, 03 Feb 2024 22:21:36 GMT

I'm running Ubuntu 22.04 LTS and Firefox recently updated itself from 121 to 122. Immediately after restarting, I noticed cpu usage shot up 10x when viewing my Unifi Controller dashboard which I keep open on a second monitor. It's only when viewing the dashboard, so as soon as I choose any other section like statistics, clients, whatever, the cpu drops back to normal. It only does it with this one page which makes me think it's a java related issued in Firefox. Unfi has not been updated for months (I don't auto update Unifi) so nothing has changed there.

So to confirm it was the new v122 update, I downgraded to v121 and the cpu usage was normal. I also installed the ESR version which is at v115 and it too worked normal. Went back to v122 and cpu jumps 10x when viewing the Unifi dashboard.

Unifi runs a java instance to give a "live" update on the dashboard. So it appears v122 introduced or reverted a bug that causes cpu to jump 10x on that pid?

Re: Firefox v122 uses 10x more cpu only in one instance

Dashthechi — Tue, 06 Feb 2024 17:46:54 GMT

No one else has experienced a jump in CPU usage on java pages?

Re: Firefox v122 uses 10x more cpu only in one instance

Dashthechi — Wed, 14 Feb 2024 23:31:20 GMT

Nevermind...v120.0.1 update fixed it. 😀

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Firefox v122 uses 10x more cpu only in one instance

Re: Firefox v122 uses 10x more cpu only in one instance

Re: Firefox v122 uses 10x more cpu only in one instance