[ScottyE]

This is based off general programming knowledge, as I have never used C++, but I think it is referring to a highly-modulated programming style that uses many general functions.

I.e., instead of writing a few quick lines of code to perform bisection search in the middle of logic flow, you create a general bisection search function and implement that.

This leads to high productivity "a statement per function", and makes code cleaner and easier to update, but can substantially increase overhead costs.

[emn13]

No, C++ is particularly well suited to that since it's possible to implement those with zero (and in practice less than zero) overhead. The problem is overridable functions; i.e. not generic implementations that work on various structures by compiler specialization, but methods on classes whose implementation varies at runtime by dynamic dispatch. E.g. a getLayoutWidth method with a different implementation for blocks and inline runs, and where it's possible to call the implementation without knowing at compile time which it is.

Those cost performance.