C++ Insights - Episode 38: User-provided vs. user-declared

[@theintjengineer]

Thanks for going through that. Keep it up! Grüße aus'm Wald.

[@YourCRTube]

Good example, esp. with the chain effect with optional

[@ggladilov]

Is it the same with -O3? What does destructing an empty object mean? Would empty struct optimisation interfere here?

[@andreas_fertig]

The example is too simple for the compiler with -O3. Still, in a code base that does something with the optional, it depends on the compiler's ability to see through it. In the worst case, the compiler performs a call to an empty destructor. That might not cost much, but the costs increase if it affects caching because the destructor is not in the hot cache.