Retaining all the cool Spring features like IoC and DI, but implementing them in compile-time rather than in runtime, Micronaut significantly reduces both startup time and memory footprint. Imagine running 10x more services and getting the same cloud bill. Imagine services starting in milliseconds. Micronaut is true enabler of serverless model.
An Interview with Graeme Rocher, Project Lead of Grails and Micronaut, about Micronaut features and what we can expect from Micronaut in the future.