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add Flyweight pattern

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Jakub Vojvoda
2016-09-17 14:19:27 +02:00
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flyweight/README.md
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## Flyweight
Use sharing to support large numbers of fine-grained objects efficiently.
Flyweight pattern has has structural purpose, applies to objects and uses sharing to support
large numbers of fine-grained objects efficiently. The pattern can be used to reduce
memory usage when you need to create a large number of similar objects.
### When to use
* when one instance of a class can be used to provide many "virtual instances"
* 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