Sharing a couple comments from the graal blog post that might be of interest to people:

Regarding the Python C-extension topic, note that a fair amount of this is already possible with Jython and JyNI. While JyNI is also still in early stage, most notably NumPy core functionality is already working, see  for details and links to examples.

and

FastR can support R code with native C/C++ implemented pieces. We support (to some extent) the Rcpp package as well. It is work in progress, but FastR's aim is definitely to support native code as much as possible. That being said, with FastR you often get the same performance with pure R as you would if you've written your code in C instead.

👍

I won against clojars! The first of lein-jupyter is here: https://github.com/didiercrunch/lein-jupyter

If you try it on other platform than linux, tell me if it works.