Status: IN
The GoF's controlled-sharing meta-pattern provides the efficiency substrate that enables composition-based designs to scale: Flyweight's factory-managed sharing makes Composite trees viable at extreme scale (180K characters reduced to 480 shared glyph objects), while Singleton registries and Flyweight factories together enable cross-category pattern integration (State subclass sharing, Prototype managers), ensuring that composition's structural elegance is not undermined by prohibitive memory costs.
Controlled-sharing infrastructure (Singleton registries + Flyweight factories) is the efficiency substrate that makes large-scale composition viable
Depends on (SL): creational-enables-cross-category-sharing, composite-flyweight-scalable-trees