4 ms·

Good points, I hadn't considered that the implementation of a vector could widely vary. That makes sense.

• vvanders 11y ago
  Yup, the spec is also really vague on if clear() actually releases memory. AFAIK the only "correct" way to actually clear a vector is "vec = std::vector<T>()" with the STL.
  • hellofunk 11y ago
    That is rather interesting!
  • pragmatib 11y ago
    Actually you'd have to try harder: even this might leave the current capacity unchanged. The blessed idiom is vec.swap(std::vector<T>()); c++11 added shrink_to_fit which is a non binding request to reduce capacity.