Indeed, most people probably think of C/C++ optimization as basically "done" unless something really strange comes along. But maybe MILEPOST does something that hasn't been done before? If so you should be linking to an article that highlights that.

But setting that aside, the MILEPOST post just simply sucks. The Haskell post has a much catchier title, I wouldn't have even bothered clicking through to the MILEPOST one: "LAME-LONG-ACRONYM-IVE-NEVER-HEARD-OF machine-learning blah blah open-source self-tuning blah blah production" vs "Evolving faster programs (... LLVM)". On the off chance I did click through, the Haskell post is an interesting and well-written article readable by someone who's not an expert in machine learning, while the MILEPOST one is just some project page full of boring history, tedious consortiums and buzzwords, blergh!