@retronym: with current master if you build quick using `ant -Dscalac.args="-Yinline-warnings" build-opt` you get:
814 warnings `At the end of the day, could not inline @inline-marked method ...`
258 warnings `Could not inline required method ...`

That's 1072 inliner warnings that nobody understands. If we keep adding `@inline` without looking addressing existing warnings we just make the situation worse, not better.

Here's the log: https://gist.github.com/4687953