perf: bind:clientWidth has noticeably bad performance

[MathiasWP]

Describe the problem

Please see this git-repo for more info. (It also contains the code for the playground used in the video below)

Here's a video showcasing the performance difference between using bind:clientWidth and not using it:

Screen.Recording.2023-03-14.at.19.49.11.mov

Describe the proposed solution

MutationObserver? I know this is probably a difficult thing to refactor, but i just want to address this issue as it has been a big bottleneck for our software in some cases.

It's such a nice feature, but it's not stated anywhere that bind:clientWidth (or any of the other width/height bindings) will introduce a noticeably amount of performance overhead.

Alternatives considered

Every case has a different work-around

Importance

would make my life easier

[brunnerh]

Duplicate of:

• Improve performance of bind:clientWidth using ResizeObserver api #7583