> In Java, they'll behave like async/await, only without the syntactic constructs. Stacks and stack frames are moved, can shrink and grow, can have various repr

> In Java, they'll behave like async/await, only without the syntactic constructs. Stacks and stack frames are moved, can shrink and grow, can have various representations etc., and the scheduling is entirely pluggable. You can schedule the continuations manually, or in a scheduler of your choice, shared, or not, with ordinary tasks. When you write "Java", you mean a specific implementation of the JVM, like the JVM reference implementation in OpenJDK, or you imply that all JVM implementations must support this to be called Java? Edit: Is your comment related to Project Loom, aiming to add fibers and continuations to Java?