When selecting a framework for Java EE microservices, you should consider the start-up time, size and memory footprint of a microservice.
The article Java EE microservices: why start-up time and size matter shows an interesting comparison of MicroProfile Java EE frameworks, including WebSphere Liberty, WildFly Swarm, Payara, TomEE and KumuluzEE.
KumuluzEE has achieved the fastest start-up time of 3 seconds and the smallest JAR size (11 MB):
Also, it has the smallest memory footprint:
KumuluzEE Java EE Microservices