Looking at the GraalVM compiler with Doug Simon

During this stream we looked at how to build a GraalVM distribution from the sources. GraalVM uses the `mx` build tool, using which is straightforward, but not a common knowledge for Java developer. Doug Simon, the GraalVM compiler team lead explained how to load the GraalVM project into the IDE, and the main classes one could look at to have the first basic understanding that the compiler is doing.

We looked at some helpful ways the compiler uses Java language features to simplify the development: annotations, unit tests and benchmarks for individual compiler optimizations, etc.