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"The key to making programs fast is to make them do practically nothing." I believe the quote original is here[0]

Maybe: s/practically nothing/less

How to make things go faster: Do fewer things.

"no code is faster than no code"

Exactly. I've heard a similar quote: "The only way to make a program run faster is to make it do less."

Do less unnecessary work. Unfortunately that needs to be stated explicitly in the age of function-follows-form pseudo-minimalism.