Day: November 25, 2020

Let us try to understand RVO(Return value optimization) with the help of below example: #include <iostream> using namespace std; class base { unsigned int m_mem1; unsigned int m_mem2; public: base(unsigned int x, unsigned int y): m_mem1(x), m_mem2(y) { cout << “base C’tor” << endl; } ~base() { cout << “base d’tor” << endl; } base(const base& b) { m_mem1 = b. m_mem1; m_mem2 = b. m_mem2; cout << “Copy C’tor” << endl; } static base getNewInstance() { base b(10,20); return b; } }; int main() { base b = base::getNewInstance();…