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2 of 3 selected

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

Criteria	structuralFlyweightView pattern	creationalSingletonView pattern
Basics
Category	structural	creational
Summary	—	—
Intent	Use sharing to support large numbers of fine-grained objects efficiently by separating shared intrinsic state from per-object extrinsic state.	Ensure a class has only one instance and provide a global access point 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 system needs exactly one shared instance of a class, and that instance must be globally accessible without allowing uncontrolled duplication.
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	Can make dependencies harder to test if the singleton is used everywhere May introduce hidden global state that complicates debugging and concurrency
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.	Singleton is useful for centralized services like configuration, logging, caching, and shared application state.