Performance issue with moving pages and large image collections

[MathiasGmeiner]

Description

We've encountered significant performance issues in the "move"-dialog when a Kirby installation contains at least one folder with many (in our case 700) images:

• Opening the "move" dialog takes ~5 seconds
• Opening the "news overview" page to view its ~300 children takes ~30 seconds
• The bottleneck appears to be loading time for "/panel/site/tree?move=..."

We've already tried implementing the solution suggested by "bnomei" in this forum thread, using a custom page model with isListable set to false, but the issue persists.

Steps to Reproduce

1. Create or use a Kirby installation with a folder with large media collection (700+ images)
2. Create a section with many children pages (300+) - I think this is optional
3. Attempt to open the "move" dialog for any page
4. Attempt to navigate to a parent page with many children

Environment

• Kirby Version: 4.7
• PHP Version: 8.3

Screenshots

opening of the dialog

click on "news-overview" to open the children

Kirby Version
4.7