Project Leyden is a new OpenJDK project that intends to improve startup time, time to peak performance, and footprint of Java programs.
Watch this related talk by Brian Goetz himself if you want to learn more.
Project Leyden is highly experimental and will change significantly as it evolves.
To see it in action, follow along this version of the well-known spring Petclinic application with Project Leyden at this repository link