Jepsen is a Clojure library for testing distributed systems correctness. We'll talk about how Jepsen records and analyzes histories of up to a billion operations with the help of a new file format, faster lazy and persistent data structures, bit-packing, memory-adaptive caching, associative folds, and thread-safe transactional executors. Come learn about some of the lesser-known corners of the JVM and how to write faster, more efficient programs in any language.

This talk will benefit intermediate to advanced engineers interested in performance optimization, parallelism, and medium-sized datasets, while also offering insights valuable to both beginners and senior engineers.