GHC 6.8.1 is impressive!

[Simon Peyton-Jones]

| In that case, the 33% I cite above includes constructor
| specialization, since we compile with -O2 anyway. I just wasn't sure
| that it was in since it wasn't called out in the release notes.

Probably because it was in 6.6 too, only less polished.

| On
| that topic, does anyone know a clever way to get a more detailed
| changelog between 6.6.1 and 6.8.1? It would be useful for situations
| like that when I'm curious about changes that didn't make the release
| notes.

Well the release notes (not the announcement) are pretty detailed:
http://haskell.org/ghc/docs/6.8.1/html/users_guide/release-6-8-1.html
Beyond that, it's 'darcs changes', but you'll get a *lot* of output!

Simon