Impressive! One thing that caught my eye was:

> In the process, we also optimized our XML parser, released now as Fast XML, a high-performance, memory efficient Expat-based Erlang and Elixir XML parser

The shout out to Elixir is interesting. I glanced through the linked GitHub code and as far as I can tell nothing is written in Elixir, although it's still a trivially true statement since Elixir can easily use Erlang libraries. I guess Elixir is a big enough force in the Erlang community now that they want to highlight that their software works fine for Elixir users as well!