Raw performance is efficiency. You must consider space efficiency, CPU efficiency, network efficiency, time efficiency, developer efficiency, etc
Efficiency is analogous to velocity, with gains analogous to distance. Highly efficient developers must still travel non-trivial distances to achieve performance gains, and therein lies the core of my epiphany, that performance is not efficiency, and highly efficient developers must spend non-trivial amounts of time to achieve performance gains that may in fact undermine development velocity, CPU efficiency per task, architectural efficiency (DRY), time efficiency (latency), etc...