Iron Law of Processor Performance

• Computer Systems
• John Hennessy and David Patterson 2017 ACM A.M. Turing Award Lecture

$${\text{Time} \over \text{Program}} = {\text{Instruction} \over \text{Program}} \times {\text{Clock Cycles} \over \text{Instruction}} \times {\text{Time} \over \text{Clock Cycles}}$$