[throwawaylinux]

Fundamentals about how a CPU works, machine code, caches, memory, etc. have not changed for 50 years. Well, they have and they haven't I guess. But high frequency highly pipelined speculative out of order CPUs with several levels of cache and much slower memory have been pretty "unchanging" for almost 30 years. That is to say they've also changed a lot, but fundamentally extremely recognizable and many of the major basic techniques for extracting good performance are the same. Multiprocessing and SIMD/vector processing are significantly more common now, but they were around back then too.