Following on from this blogpost about how much time is spent in Makefiles, pcwalton sent me a link to his blog. He has a great breakdown of mac osx builds, showing where all those minutes go for each mac osx build.
We spend ~55% of the time compiling (“g++-4.2”, “gcc-4.2”, “gcc”), but whats in the other 45% – and why?? Some investigation work ahead of us. Thanks pcwalton for doing all this work – data like this really helps figure out where to focus attention first.