[Bug]: Dialog causes layout reflow which causes bad performance for large DOM trees

[Mokkapps]

Environment

Development/Production OS: Linux / StackBlitz
Node version: v18.18.0
Package manager: [email protected]
Radix Vue version: 1.5.3
Vue version: 3.4.15
CSS framework: [email protected]
Browser: 123.0.6312.59 (Official Build) (arm64)

Link to minimal reproduction

https://stackblitz.com/edit/vitejs-vite-p7dnnw?file=src%2FApp.vue

Steps to reproduce

• Throttle CPU performance in your browser
• Open the dialog

Describe the bug

Dialog opens very slow on slow devices (emulated via 6x CPU slowdown via browser DevTools) on a page with many DOM nodes.

Performance profiler indicates that a layout reflow is triggered.

Expected behavior

Dialog opens smoothly on slow devices with many DOM nodes and does not trigger a layout reflow.

Context & Screenshots (if applicable)