What are the differences between FIFO and LRU caching algorithms?

What are the differences between FIFO and LRU caching algorithms?

FIFO (First In, First Out) removes the oldest item in the cache, while LRU (Least Recently Used) removes the least recently accessed item.

Which one is more efficient in terms of performance?

It depends on the access patterns. LRU is generally more efficient for workloads with temporal locality, while FIFO can be simpler to implement.

Can you give an example of when to use each algorithm?

Use FIFO for simple scenarios where access patterns are predictable. Use LRU for applications like web caching where recent data is more likely to be reused.

What are the trade-offs of using LRU over FIFO?

LRU requires more overhead to track access times, which can lead to increased complexity and slower performance in some cases.