What are the different caching algorithms and how do they compare?

What are the different caching algorithms and how do they compare?

There are several caching algorithms, including LRU (Least Recently Used), FIFO (First In First Out), and LFU (Least Frequently Used). Each has its strengths and weaknesses depending on the use case.

Can you explain how LRU works?

LRU 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.

What about FIFO? How does it differ from LRU?

FIFO removes the oldest item in the cache, regardless of how often or recently it was accessed, which can lead to less efficient cache usage compared to LRU.

Which algorithm is generally considered the best?

It depends on the specific application. LRU is often preferred for its efficiency in many scenarios, but LFU can be better for workloads with stable access patterns.