A technical analysis of Caffeine, a high-performance caching library used by major projects like Kafka and Cassandra. The article explores its core components including the Window TinyLFU eviction policy, frequency sketching algorithm, expiration mechanisms using order queues and hierarchical timer wheels, and adaptive cache policy. The text particularly focuses on the implementation details, data structures, and optimization techniques used to achieve high performance and efficiency.
https://adriacabeza.github.io/2024/07/12/caffeine-cache.html