2207ea4ce9
* add state and callback pattern * add command and template-method pattern * add iterator pattern * add bridege and DI pattern * fix issue #1600 * add converter,proxy,visitor pattern * add caching,composite,delegation,dirty-flag,interpreter patterns * add dao and producer-consumer * add dto and provate class data pattern * fix #1646 png path problems * fix #1646 composite png path case problem Co-authored-by: Mike <admin@xiaod.info> Co-authored-by: Subhrodip Mohanta <hello@subho.xyz>
30 lines
884 B
Markdown
30 lines
884 B
Markdown
---
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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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categories: Behavioral
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tags:
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- Game programming
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- Performance
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---
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## 或称
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* 是否脏 模式
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## 目的
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避免昂贵资源的重新获取。资源保留其身份，保留在某些快速访问的存储中，并被重新使用以避免再次获取它们。
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## 类图
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## 适用性
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在以下情况下使用脏标志模式
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* 重复获取，初始化，释放相同资源所导致不必要的性能开销
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## 鸣谢
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* [Design Patterns: Dirty Flag](https://www.takeupcode.com/podcast/89-design-patterns-dirty-flag/)
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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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