AsyncDisplayKit/_docs/subtree-rasterization.md

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Subtree Rasterization	docs	/docs/subtree-rasterization.html	drawing-priority.html

Precompositing. Flattening an entire view hierarchy into a single layer also improves performance, but comes with a hit to maintainability and hierarchy-based reasoning. Nodes can do this for you too!

rootNode.shouldRasterizeDescendants = YES;

...will cause the entire node hierarchy from that point on to be rendered into one layer.