What are the differences between LFU and LRU caching algorithms?

What are the differences between LFU and LRU caching algorithms?

LFU (Least Frequently Used) removes the least frequently accessed items, while LRU (Least Recently Used) removes the least recently accessed items.

Can you give me an example of when to use LFU over LRU?

Use LFU when you have data that is accessed frequently but not necessarily recently, like user preferences.

What are the advantages of using LRU?

LRU is simpler to implement and works well for data that has temporal locality, meaning recently accessed data is likely to be accessed again.

Are there any scenarios where both algorithms fail?

Yes, both can struggle with workloads that have unpredictable access patterns, leading to suboptimal cache performance.