Yep, that was Lars' doing as well. He ran like 1 years worth of Emacs builds on every commit to see where the big jumps occurred, dug down and fixed regressions

Yep, that was Lars' doing as well. He ran like 1 years worth of Emacs builds on every commit to see where the big jumps occurred, dug down and fixed regressions. There were other people helping too, but I remember Lars being the driving force behind the endeavor.