Unity UI How to pause OnCanvasHierarchyChanged?

Hi,

our game contains a lot of complex UI prefabs. Some of them are proceduraly built at runtime.

I was investigating why some of our views are taking a long time to appear. That view has 50+ small icons (image + TMPPro + layout) that are instantiated at runtime. I noticed that we get a lot of OnCanvasHierarchyChanged calls, more than expected. I feel like each time ONE element is added, the whole canvas is rebuilded. Is my assumption correct? If that's the case, is there a way to pause the UI "engine" while I am actively populating my UI? Something like:

canvas.PauseHierarchyRebuild();
... create all dynamic ui ellements ...
canvas.ResumeHierarchyRebuild();

Thank you!

 

Did you ever come up with a solution for this?