MahApps.Metro: CheckBox performance is very bad

Describe the bug

Compared to the built-in WPF checkbox style, the rendering performance is really bad. Perhaps due to the massive amount of attached properties?

I saw some PRs that added fallback values, and have tried that but it didn’t help with rendering speed. Only thing that works is removing the checkboxes or going back to WPF’s own style.

Steps to reproduce

A description of how to trigger this bug.

1. Add a listbox with am item template with a checkbox and some other stuff, such as some of the MahApps icons 🙂
2. Add several hundred items.
3. Virtualization can be enabled or disabled, it doesn’t matter.
4. Scroll, and see how laggy it is.

Expected behavior

It should not lag.

Actual behavior

It lags.

Environment

MahApps.Metro version: v2.4.9
Windows build number: Win10 22H1
Visual Studio: 2022
Target Framework: .NET v4.7.2, also .NET 6.0.