Go's ''goroutines'' became preemptive with Go 1.4 in 2014 and are a prominent application of virtual threads.
=== Java Project Loom ===
[https://openjdk.java.net/projects/loom/ Project Loom]: ''Virtual threads'' is a lightweight user-mode scheduled alternative to standard OS managed threads. Virtual threads are mapped to OS threads in a many-to-many relationship. Work on project loom by Oracle started in 2017. Loom has the goal of implementing virtual threads for performance, at the same time simplifying thread handling across OS threads, concurrent threads and virtual threads. As of 2022, Project Loom is available as early-access using JDK 19, with full implementation added in 2023 with JDK 21.
