https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86013
--- Comment #6 from Jan Kratochvil <jan.kratochvil at redhat dot com> --- (In reply to Marc Glisse from comment #5) > I can't find anywhere a guarantee that realloc doesn't move stuff when the > new size is smaller than the old. In practice it does not. > What would be the point of shrink_to_fit() otherwise? It was created as a > nicer alternative for people who were copying to a new temporary vector and > swapping them. It should be implemented in the most optimal way. ISO C++ standard does not talk about any copying: https://stackoverflow.com/questions/2664051/why-is-shrink-to-fit-non-binding/2664094
