What are the advantages and disadvantages of using an LRU cache?

What are the advantages and disadvantages of using an LRU cache?

The main advantage of an LRU (Least Recently Used) cache is that it efficiently manages memory by keeping frequently accessed data. This can significantly improve performance in applications where data retrieval speed is critical. However, a disadvantage is that it can be complex to implement and may require additional memory overhead for tracking usage.

Can you explain how LRU cache works?

Sure! An LRU cache keeps track of the order in which items are accessed. When the cache reaches its limit, it removes the least recently used item to make space for new data. This way, it retains the most relevant data based on usage patterns.

What are some use cases for LRU caches?

LRU caches are commonly used in web browsers for storing recently visited pages, in databases for caching query results, and in operating systems for managing memory pages.

Are there alternatives to LRU caching?

Yes, alternatives include FIFO (First In, First Out), LFU (Least Frequently Used), and ARC (Adaptive Replacement Cache), each with its own advantages and use cases.