The main thing to bear in mind when aiming for performance is that FlexBuilder will always default to "doing the right thing" -- which may be a lot slower than necessary. For instance: if you write a script that adds 100 FlexItems to a FlexContainer, FlexBuilder will automatically re-run the layout algorithm ... 100 times. ... Read more
After a few years of working with UIToolkit, and continually deploying it in apps and trialling solutions from the community, I eventually arrived at this "simple" code example that appears to work in all versions of Unity from 2019 through 2021+. I'm using this in production, will update this post if I find new problems ... Read more
When building flexible UI in Unity3D you may sometimes see this message on the Unity console: FlexBuilder: Your CACHE_STRATEGY is too aggressive! - Cache contained an object Unity had already destroyed TL;DR: quickest solution If you just want to make the warning go away then you can safely comment-out the line of code that produces ... Read more