Jactl Continuations and Virtual Threads in Java 8
Summary
Jactl Continuations and Virtual Threads in Java 8 explains how Jactl simulates asynchronous operations on Java 8 by using continuation objects and exception-chaining, and compares this approach to Java 21's Virtual Threads. It covers how async functions are identified, how execution state is saved/restored, and how checkpointing can persist script state. The piece also includes benchmarks demonstrating overhead is modest and discusses backward compatibility and potential disablement on newer Java versions.