Continuations and Fibers: The New Frontier for Java

on YouTube ↗59m

" summary

Project Loom introduces continuations as a data structure (Continuation/ContinuationScope and yield/run) and virtual threads/fibers so IO waits suspend a task not the OS thread; a demo shows 4,000 native threads run but 5,000 triggers OOM, while virtual threads report true and resume correctly. Examples mirror JavaScript generators and Kotlin coroutines, target HTTP/DB/file IO, and claim millions of JVM threads are feasible, cutting servers and keeping code single-threaded in practice.

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" chapters (8)

1. 0:00Introduction to Project Loom
2. 6:37Limitations of traditional threads
3. 12:55What are continuations?
4. 21:31Parallel vs concurrent execution
5. 30:29How fibers improve scalability
6. 41:06Use cases for continuations
7. 51:17Virtual threads in Project Loom
8. 58:07Future of Java with continuations

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