Graal will be usable in Java 9, and Truffle has been relatively stable for a while now. If you are doing a project from scratch I would highly recommend trying them out.
You can talk to the Graal and Truffle teams directly on https://gitter.im/graalvm/graal-core if you can't find where to start or have questions.
You can talk to the Graal and Truffle teams directly on https://gitter.im/graalvm/graal-core if you can't find where to start or have questions.
I lead the Ruby implementation https://github.com/jruby/jruby/tree/master/truffle which along with FastR is one of the most sophisticated open-source users of Truffle and Graal.