Daniel Spiewak

Daniel Spiewak is a Software Developer based out of Boulder, CO. Over the years, he has worked with Scala, Java, Ruby, Haskell, C/C++, SML, Clojure, and countless other languages. He currently spends most of his time maintaining the Cats Effect project and continuing to push the boundaries of what is possible at the intersection of mathematical laws and highly scalable production implementations.

Daniel will be speaking at Sphere.it conf 2022 on the topic:

Threads at Scale

Multi-threaded concurrency has been a strength of the JVM since Java 1.2, and its implementation in that runtime has been a major driver behind the JVM's pervasive adoption in modern highly distributed, high-RPS backend services. Just about everyone who works on the JVM writes software that fundamentally relies on threads, but very few understand how to conceptualize the performance and tuning implications of this deceptively simple construct.

In this talk, we will embark on a journey that takes us from the raw hardware all the way up to effect systems and other high-level userspace abstractions, and along the way, we will discover how threads interact, how asynchronous I/O works (and doesn't work!), and learn One Weird Trick for dramatically improving tail latencies in almost any I/O bound, high-scale backend service.