Spring Boot vs. Micronaut: Which Framework Wins?

For the last five years, Spring Boot has been my default choice for microservices. It’s the Swiss Army knife of Java frameworks. But recently, I started a project for a startup where startup time was critical because we needed to scale up and down rapidly on Kubernetes. That’s when I tried Micronaut. The difference in memory consumption and startup time is actually insane. Spring Boot apps took about 15-20 seconds to start; Micronaut did it in under 2 seconds. However, I have to be honest: the developer experience with Spring is just smoother. The documentation is everywhere, and if you run into a weird bug, chances are someone else has solved it. Micronaut is catching up, but for complex enterprise apps with tons of integrations, I still reach for Spring Boot first. It really depends on your ops constraints.