>=100% CPU load if aria-busy=true animation in dialog

[mirko]

trafficstars

Describe the issue

Current Behavior

If I'm using aria-busy=true inside e.g. a div within dialog-tags, my web browser's processing resources skyrocket. This does not happen if the aria-busy=true-animation is happening without the dialog involved.

Expected Behavior

Such a basic animation like aria-busy=true should not use up all available CPU resources but run smoothly at no cost.

Reproduction URL

https://codepen.io/mirko2342/pen/yLdoemy

Environment

Linux, Firefox and Chromium

[davidsenk]

I just gave it a shot because this was something I was planning on wanting to use. Does not appear to be reproducible for me at least

Arch Linux - Firefox 128.0

[dev-willis]

Yeah, I couldn't reproduce it either.

[mirko]

Oh, ok. Long shot, as I still see this: I'm running my web browsers sandboxed (linux namespaces) - this includes them having limited or no direct access to hardware, probably including graphics acceleration (what comes to mind is e.g. /dev/dri/*).

Might be I misinterpreted it as an issue in picocss, while it affects all kinds of (combinations of) animations / blurs.

If that's the case, I still don't think a small spinning wheel should consume >=100% CPU, but that at least would mean it's not picocss specific - background blurred or not.