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design-patterns-cpp/flyweight/README.md
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Flyweight

Use sharing to support large numbers of fine-grained objects efficiently.

When to use

  • when all of the following are true
  • an application uses a large number of objects
  • storage costs are high because of the sheer quantity of objects
  • most object state can be made extrinsic
  • many groups of objects may be replaced by relatively few shared objects once extrinsic state is removed
  • the application doesn't depend on object identity