Project Loom, expected to be delivered in final form in #Java 21, brings "virtual" threads to the Java platform. After an introduction to the concepts of virtual threads, structured concurrency, and extent locals, the talk focuses on the implications for #programmers. Why should you care about Loom if you will never run a million concurrent tasks? How do you choose between virtual and platform threads? When blocking is cheap, is there still a benefit to reactive programming? Which parts of "Concurrency in Practice" are now outdated, and what is still relevant? What concurrent synchronization mechanisms and design patterns should you favor? How do you debug and profile virtual threads? Wha...