Why does Vivaldi browser consume the lion share of CPU resources?

SNCH

I would appreciate any ideas on how to understand what makes the Vivaldi browser to consume a lot of CPU resources.

Here are screen-shots of Windows Task manager as well as Vivaldi's internal process manager.

The only open tab in Vivaldi at the moment is https://www.google.com.
Five extension are installed, but every single one of them has been disabled.
Cookies/cache had been cleaned, the browser was restarted.
Some default settings were changed to tune the browser look/behaviour in accordance with my preferences, but it was nothing extreme.
Four mailboxes (two Yahoo Mail boxes and two G-mail ones) are connected in the meantime.
I suppose I could flush the profile, but, honestly, I would hate seeing my settings gone (I could do that, if there are no other ideas, though).

Launching Vivaldi with the configuration described above results in the CPU fan to start rotating at the highest speed possible (or so it seems).

Factual data:
Vivaldi: 6.6.3271.48 (Stable channel) (64-bit)
Revision: ebcc4ade9d056b280d4c4bd195761b49d422c01d
OS: Windows 10 Version 21H2 (Build 19044.5131)
CPU: Intel Core i5-8365U CPU @ 1.60GHz, 1896 MHz, 4 Core(s), 8 Logical Processor(s)
RAM: 16 GB

mib2berlin

@SNCH
Hi, some user report this with using mail/feeds in Vivaldi, just disable it for a test.

You don't loose anything I tested this a few minutes ago.
Your Vivaldi version is very old, nobody can test this, why you don't update?

SNCH

@mib2berlin Well, I simply did not know my version was outdated. For some reason, the browser did not notify me about available updates (I certainly did not turn these notifications off). Anyway, installing the latest update did not remedy the situation.

But turning that mail/feed feature off (followed by restart) did! Now, Vivaldi is back to sanity, consuming about one per cent of CPU resources.

The bug has probably been raised, I suppose I can wait for the fix to arrive (I do use the disabled functionality this time and another, but I can live without it for a while).

Your advice is much appreciated!

mib2berlin

@SNCH
You are welcome.
If you use IMAP you can try to remove one account by another and test, then add them again.
The problem with this bug is, I have 5 accounts running but get 1% too.
Once I add only one feed and get the same issue, removing it and add it again solved it.
I could never reproduce this, running several installs and profiles with 1 to 5 mail accounts.

Cheers, mib

DoctorG

@mib2berlin @SNCH And sometimes i saw such with broken remote calendars (implementation on server, problems with CalDAV).

vivaldisi

@mib2berlin hello I went to see if I had that option activated and it comes disabled by default Is there a general topic that mentions these tips and advice for desactive some options and better in consumes fewer resources be faster etc.

SNCH

@mib2berlin Well, for me the situation is somewhat different. The problem, as you guessed, happen to have been IMAP accounts. Any of them, actually (I am using two Yahoo Mail accounts and two G-mail ones). As soon as I delete all of them, things return to normal (upon restarting the browser). The moment I add any account back, Vivaldi starts eating half of the CPU resources again. On the other hand, Thunderbird handles all four accounts with no problem.

I am not sure whether it helps, but at least the issue is perfectly reproducible on my configuration. Should you come up with any ideas on what could be tried to isolate the problem, I would not mind doing some testing.

mib2berlin

@SNCH said in Why does Vivaldi browser consume the lion share of CPU resources?:

any ideas on what could be tried to isolate the problem

To be honest, no.
M3 (Vivaldi mail) can handle my 5 accounts fine.
As you have a running Thunderbird anyway you can play around a bit.
Remove all accounts, close Vivaldi, then delete the folder:
AppData/Local/Vivaldi/User Data/Default/Storage/ext/mpognobbkildjkofajifpdfhcoklimli/
This is the Windows path opened on Linux.
Start Vivaldi and add the first account, if the CPU usage is high again I am out of ideas.

SNCH

@mib2berlin Your suggestion has worked! The directory was re-created and this time adding all four accounts back did not result in putting any considerable load on the CPU. Thus, the problem has been solved completely. Possibly, it was a cache issue or something. Thank you very much once again!