Guava, Graal and Partial Escape Analysis

Recently java 10 release happened - in fact, Graal was available earlier, but now it is more easy to access and use it - Congratulations, you're running #Graal! - just add a couple options:

-XX:+UnlockExperimentalVMOptions -XX:+UseJVMCICompiler

What does it can provide for us and what kind of enhancements we can expect to get, and more over - what dirty-hacks could be dropped ?