> these lines of code [were] pulling data from memory and software cannot beat Physics. [These] are elementary operations... > measuring big effects is easy, m

> these lines of code [were] pulling data from memory and software cannot beat Physics. [These] are elementary operations... > measuring big effects is easy, measuring small ones becomes impossible because the action of measuring interacts with the software > to multiply the performance by N, you need ... 2^N optimizations > why companies do full rewrite of their code for performance