Is "the math stuff" all the optimizations being performed e.g. vectorizing multiplication? Not trying to sound dismissive here but the core math the post is wo

Is "the math stuff" all the optimizations being performed e.g. vectorizing multiplication? Not trying to sound dismissive here but the core math the post is working with is actually a pretty straightforward matrix multiplication. The bulk of the discussion focuses on optimizing the execution of that straightforward multiplication algorithm [triple-nested for loop; O(n^3)] rather than making algorithmic/mathematic optimizations. And again, specific questions are easier to answer. :)