In what scenario are VM queues recommended to be used?

VM (Virtual Machine) queues are specifically optimized for high-performance, asynchronous communication within the same Mule application. They are designed to facilitate lightweight and fast messaging between different components of the application. This is particularly beneficial when you need to decouple various parts of your application while maintaining performance, as VM queues operate in-memory and do not involve network overhead, making them extremely fast.

Using VM queues allows for quick communication and processing, which is ideal in scenarios where the application components are tightly linked but need to operate asynchronously to improve throughput and responsiveness. This kind of setup is often utilized in microservices architecture within a single application to prevent bottlenecks and to enhance overall processing speed.

While other options like high-reliability inter-app communication or complex operations might require different messaging strategies or technologies to ensure durability and scalability, in-memory VM queues shine in scenarios demanding speed and low latency.