Modern Java has Coordinated Restore at Checkpoint (CRaC) as well as ways to compile it to native binaries that can start very fast (GraalVM & Substrate VM). The former has the benefit of a JIT as well!
Have you used any of these? I’m looking for ways to speed up start time of JVM, but almost options I’ve seen so far are “experimental” and not sure best route to take. For example was sad to see ahead of time compile being removed from JDK.