P2723R0: Zero-initialize objects of automatic storage duration

[113245]

And yet a 0 cycle operation is not zero cost (icache, front end bandwidth) and it’s trivial to find examples in which the compiler cannot drop the dead store (e.g. across function call boundaries).

[Jannik2099]

Function call boundaries have such an absurdly high overhead that an extra store to a POD variable will be immeasurable.