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Current selection

2 of 3 selected

You can now review the differences across the comparison table below.

Criteria	structuralFlyweightView pattern	structuralProxyView pattern
Basics
Category	structural	structural
Summary	—	—
Intent	Use sharing to support large numbers of fine-grained objects efficiently by separating shared intrinsic state from per-object extrinsic state.	Provide a surrogate or placeholder for another object to control access to it.
Decision factors
Problem	A system creates a large number of similar objects, but storing all of their state separately uses too much memory.	A client needs to interact with an object indirectly because the real object may be expensive, sensitive, or remote.
Tradeoffs	Adds complexity because state must be split into shared and unshared parts Can be harder to understand when many objects depend on an external context	Adds another layer of indirection Can make the design more complex when the extra control is unnecessary
Practical fit
Languages	typescript java python angular react react-native csharp dotnet	typescript java python angular react react-native csharp dotnet
Platforms	Web Backend Mobile UI kits Cross-platform systems	Web Backend Mobile UI kits Cross-platform systems
Integration notes	Flyweight is useful when thousands or millions of similar objects need to be represented efficiently, such as trees, glyphs, tiles, or UI tokens.	Proxy is useful for lazy loading, access control, caching, logging, and remote service wrappers.