Re: Top 10 most common hard skills listed on resumes...

And in small systems programming, much of the standard library /is/ omitted.

No, it is not - function calls when the compiler cannot see, or cannot use, the definition of the called function can have significant overheads well above the cost of a dozen instructions.  Virtual function calls add to that due to an extra layer of indirection.  And many virtual functions are very small, simply reading or writing a variable.