<ul><li>NSCache's eviction strategy is not defined and it's not LRU, which can impact performance when handling memory caching.</li><li>Many developers opt to create their own LRU cache implementation like LRUCache using a Swift Dictionary with a linked list to control memory consumption effectively.</li><li>When dealing with custom LRU cache implementations, it's important to manage memory allocation carefully to prevent issues like stack overflow caused by automatic deallocation of linked list nodes.</li><li>To ensure objects are retained in the cache even when the app is backgrounded, developers can implement the NSDiscardableContent protocol within the objects stored in the cache.</li></ul>

NSCache and LRUCache

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