Comment Re:Learning (Score 3, Informative) 173
Actually GCC has way more than 50 compiler options. In addition, this work actually goes deep into GCC, modifying the code and exposing many more optimisations that are not available with standard compile flags.
Further, you can reorder these optimisations, which really does give different results. All this combines to give a huge optimisation space which is suitable for tackling with machine learning.
