Thanks for posting. The article "Executable Pseudo-Code" is a great example for the incredible expressiveness given by Lisp Macros. The author implemented Brandes' code for betweenness centrality in such a manner, that it nearly 100% resembles the pseudo code AND performs, in terms of speed, at the same level as the C++ boost implementation.

It is great to see such development and it will hopefully bring back Lisp a bit more into the (academic) community.