Premature optimization and Premature pessimization related to C++ coding standards

Question

Herb Sutter\'s C++ coding standards says to avoid Premature optimization and Premature pessimization. But I feel both is doing the same th

Answer 1

What he means by premature pessimisation, I think, is just the opposite of premature optimisation: a fundamental disregard of which data structures and algorithms to use.

Premature optimisation is often concerned with minute details of algorithms that can well be tweaked later and don’t need to be paid attention to at the beginning.

Premature pessimisation, by contrast, concerns the high-level design of code architecture: a fundamentally inefficient interface for your library for instance cannot be fixed later by optimising, since the public interface is pretty much cast in stone.