Nested Canvas Performance

[Yakirbu]

Hello,
After encountering some performance issues, I’ve read about optimization tips for Unity UI.

I realized that you should separate dynamic and static canvases to improve performance.
For instance, if some text element changes, if won’t re-build the whole canvas, only the dynamic canvas, which could greatly improve performance.

My question is the idea above works for nested canvases.
If I have the following structure:
– Main Canvas
---- Static Canvas
------ Dynamic Canvas

If a text changes under the dynamic canvas, it would re-build both the static canvas and the main canvas, its parents?

Thanks

[Rafael_CS]

thats the purpose of nested canvas.

Remember that layout rebuild will not be affected by nested canvas, only mesh rebuild

[smallrainf_1992]

Maybe Canvas.SendWillRenderCanvas is isolated, but when the UI element call setActive under subcanvas, Canvas. Rebuild will be triggered twice, once SubCanvas and once ParentCanvas.