What is render in Flutter?

The Flutter render tree is a low-level layout and painting system based on a retained tree of objects that inherit from RenderObject . Most developers using Flutter won’t need to interact directly with the rendering tree. Instead, most developers should use widgets, which are built using the render tree.

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What are the render objects flutter?

What is a Render Object? When Flutter draws your UI, it does not look at the tree of Widgets, but looks at the Render Objects’ one which controls all of the sizes, layouts and keeps all logic for painting the actual widget . That’s the reason why Render Object is very expensive to instantiate.15 Oca 2020

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