## Uses of Class
com.fasterxml.jackson.databind.util.LRUMap

Packages that use LRUMap
com.fasterxml.jackson.databind.deser: Contains implementation classes of deserialization part of data binding.
com.fasterxml.jackson.databind.introspect: Functionality needed for Bean introspection, required for detecting accessors and mutators for Beans, as well as locating and handling method annotations.
com.fasterxml.jackson.databind.type: Package that contains concrete implementations of `JavaType`, as well as the factory (`TypeFactory`) for constructing instances from various input data types (like `Class`, `Type`) and programmatically (for structured types, arrays, `List`s and `Map`s).
com.fasterxml.jackson.databind.util: Utility classes for Mapper package.

### Uses of LRUMap in com.fasterxml.jackson.databind.deser

Fields in com.fasterxml.jackson.databind.deser declared as LRUMap
`protected LRUMap<JavaType,JsonDeserializer<Object>>` DeserializerCache.`_cachedDeserializers` We will also cache some dynamically constructed deserializers; specifically, ones that are expensive to construct.

### Uses of LRUMap in com.fasterxml.jackson.databind.introspect

Fields in com.fasterxml.jackson.databind.introspect declared as LRUMap
`protected LRUMap<Class<?>,Boolean>` JacksonAnnotationIntrospector.`_annotationsInside` Since introspection of annotation types is a performance issue in some use cases (rare, but do exist), let's try a simple cache to reduce need for actual meta-annotation introspection.

### Uses of LRUMap in com.fasterxml.jackson.databind.type

Methods in com.fasterxml.jackson.databind.type with parameters of type LRUMap
`TypeFactory` TypeFactory.`withCache(LRUMap<Object,JavaType> cache)` Deprecated. Since 2.12

Constructors in com.fasterxml.jackson.databind.type with parameters of type LRUMap
Constructor and Description
`TypeFactory(LRUMap<Object,JavaType> typeCache)` Deprecated. Since 2.12
`TypeFactory(LRUMap<Object,JavaType> typeCache, TypeParser p, TypeModifier[] mods, ClassLoader classLoader)` Deprecated. Since 2.12

### Uses of LRUMap in com.fasterxml.jackson.databind.util

Fields in com.fasterxml.jackson.databind.util declared as LRUMap
`protected LRUMap<ClassKey,PropertyName>` RootNameLookup.`_rootNames` For efficient operation, let's try to minimize number of times we need to introspect root element name to use.