What are the performance differences between LFU and LRU caching algorithms?

What are the performance differences between LFU and LRU caching algorithms?

LFU (Least Frequently Used) and LRU (Least Recently Used) are both caching algorithms, but they prioritize different aspects. LFU evicts the least frequently accessed items, while LRU evicts the least recently accessed items.

In what scenarios would LFU perform better than LRU?

LFU can perform better in scenarios where access patterns are stable and certain items are consistently accessed more frequently over time. This makes LFU ideal for workloads with predictable access.

Are there any downsides to using LFU?

Yes, LFU can suffer from cache thrashing if access patterns change frequently, as it may not adapt quickly to new data needs.

How do I choose between LFU and LRU for my application?

Consider your application's access patterns. If you have stable, predictable access, LFU might be better. For more dynamic access, LRU is often preferred.