Swiftgram/submodules/AsyncDisplayKit/docs/_docs/layer-backing.md

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In some cases, you can substantially improve your app's performance by using layers instead of views. We recommend enabling layer-backing in any custom node that doesn't need touch handling.

With UIKit, manually converting view-based code to layers is laborious due to the difference in APIs. Worse, if at some point you need to enable touch handling or other view-specific functionality, you have to manually convert everything back (and risk regressions!).

With all Texture nodes, converting an entire subtree from views to layers is as simple as:

SwiftObjective-C

rootNode.isLayerBacked = YES;

rootNode.isLayerBacked = true

...and if you need to go back, it's as simple as deleting one line.