But this algorithm isn't a FIFO: it's a multi-generational LRU cache. That means, LRU+some extra details (evry well explained in the post) to make it perform ev

But this algorithm isn't a FIFO: it's a multi-generational LRU cache. That means, LRU+some extra details (evry well explained in the post) to make it perform even better. There are some metrics in the post, and some in the comments here too.