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Instancing would allow the application programer to declare that identical nodes are shared in the render tree. This would allow the system to cache and optimize drawing.
Optimize String Measuring (Cache or Call less)
It is no secret that the cost of string measuring can have a huge effect on performance. String measuring operations are called often in FX to determine the preferred size of controls and layout happens often in FX as application code changes the contents of controls.
It's easy to see the same strings being measured over and over again. We could fix the callers to cache/call less or cache way down deep inside of Prism.
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