[jganetsk]

I don't think Go lets you take stack addresses. If you try to do that, it will copy the data structure onto the heap.

[enneff]

The compiler is free to optimize this how it sees fit. Taking the address of a value doesn't necessarily move it to the heap.

[jganetsk]

I imagine this optimization can only happen once escape analysis is performed. In the general case, address-of moves the data to the heap, or causes it to be stored on the heap in the first place. Correct?

[enneff]

Yes.