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Re:GraalVM: Run Programs Faster Anywhere by grashalm on Tuesday April 17, 2018 @04:52PM (#16862213)
Yes you will be. But we use a different interface. Checkout this guide: http://www.graalvm.org/docs/reference-manual/polyglot/

Select your start and your target language and it will show you an example. Its a very basic example, but it basically works with all Java types. We will provide better docs soon.

Re:GraalVM: Run Programs Faster Anywhere by aardvark179 on Tuesday April 17, 2018 @05:06PM (#16862328)
We do have a partial implementation of the jruby API, though I don’t believe it works on substratevm due to reflection.