For the JVM it's worth noting that Project Loom[1], while so far focused mainly on concurrency features like virtual threads and continuations also includes a p

For the JVM it's worth noting that Project Loom[1], while so far focused mainly on concurrency features like virtual threads and continuations also includes a proposal to implement better tail calls in the JVM: > it is also the goal of this project to add an even lighter-weight construct that will allow unwinding the stack to some point and then invoke a method with given arguments (basically, a generalization of efficient tail-calls). We will call that feature unwind-and-invoke, or UAI. It is not the goal of this project to add an automatic tail-call optimization to the JVM. Since this paragraph is explicit about the feature not being "automatic", it'll be interesting to see what form this takes. [1] https://cr.openjdk.java.net/~rpressler/loom/Loom-Proposal.html https://cr.openjdk.java.net/~rpressler/loom/Loom-Proposal.ht...