[Bug] CPU usage very high, even with a limiter on

A Former User

Hello,

I posted this on reddit, but was told I should report this as a possible bug.

I was using Opera GX, and he CPU usage was crazy high. I decided to enable the limiter, but that didn't make much of a difference.

Here is a link to the post and screenshot - https://www.reddit.com/r/operabrowser/comments/dafumz/opera_gx_hogging_a_lot_of_cpu_usage_lying_about/

A Former User

Would it be possible to show the CPU usage and also the Task Manager entry of Opera GX expanded (click on the little > to the left of Opera GX) to show all the processes.

A Former User

So let me know if this is what you wanted:
alt text

A Former User

Looks like it is showing 50% of the value. Perhaps the error is related to your CPU. In a command prompt please type the following:

wmic cpu get caption, deviceid, name, numberofcores, maxclockspeed, status

You should see something like this:

Hopefully this might help the Opera developers track down the issue.

A Former User

I tried this again and the limiter came pretty darn close for me:

I used the TryIt Editor (https://www.w3schools.com/html/tryit.asp) with the following JavaScript:

<html>
<body>
</body>
<script>
var i, el;

var createdElements = {};
var events = [];

function attachAlert(element) {
    element.onclick = function() { alert(element.innerHTML); };
}

function reallyBadAttachAlert(element) {
    return function() { alert(element.innerHTML); };
}

for (i = 0; i < 1000000; i++) {
    el = document.createElement('div');
    el.innerHTML = i;

    /** posibility one: you're storing the element somewhere **/
    attachAlert(el);
    createdElements['div' + i] = el; 

    /** posibility two: you're storing the callbacks somewhere **/
    event = reallyBadAttachAlert(el);
    events.push(event);
    el.onclick = event;

}
</script>
</html>

A Former User

I'm also experiencing excessive CPU usage from the Opera GX.
Been using regular Opera before and didn't experience this issue. It's hogging my resources and it's the main browser I use for work.

A Former User

I'm sorry!!! I wasn't getting notifications about this thread for some reason. Trying to figure out my settings now.

Regarding the issue, I can't seem to recreate it. It either happens or doesn't and sometimes a restart isn't even required to solve the issue. Something just fixes itself

A Former User

I tried using the limiter and this is what it looks like... Clearly not resolved yet...