2018-02-20 09:48:44 +00:00
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---
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layout: pattern
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title: Dirty Flag
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folder: dirty-flag
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permalink: /patterns/dirty-flag/
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2019-12-13 21:09:28 +02:00
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categories: Behavioral
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2021-05-19 10:49:05 -06:00
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language: en
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2018-02-20 09:48:44 +00:00
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tags:
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2019-12-13 21:09:28 +02:00
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- Game programming
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2018-02-20 09:48:44 +00:00
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- Performance
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---
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2020-07-07 20:05:35 +03:00
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## Also known as
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* IsDirty pattern
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2018-02-20 09:48:44 +00:00
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## Intent
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To avoid expensive re-acquisition of resources. The resources retain their identity, are kept in some
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fast-access storage, and are re-used to avoid having to acquire them again.
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2019-12-07 20:01:13 +02:00
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## Class diagram
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2018-02-20 09:48:44 +00:00
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## Applicability
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Use the Dirty Flag pattern when
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* Repetitious acquisition, initialization, and release of the same resource causes unnecessary performance overhead.
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## Credits
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* [Design Patterns: Dirty Flag](https://www.takeupcode.com/podcast/89-design-patterns-dirty-flag/)
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2020-07-07 20:05:35 +03:00
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* [J2EE Design Patterns](https://www.amazon.com/gp/product/0596004273/ref=as_li_tl?ie=UTF8&camp=1789&creative=9325&creativeASIN=0596004273&linkCode=as2&tag=javadesignpat-20&linkId=48d37c67fb3d845b802fa9b619ad8f31)
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