Is my understanding of Julia correct?

[mbauman]

@sychen52

Heap or Stack

As a high level language, Julia also does not allow the programmer to explicitly control whether the memory should be allocated on stack or heap. Instead, it is up to the complier to optimize for you.

This one could use a bit of a caveat, in that typically mutable structs are heap allocated and typically immutable structs are stack allocated, but the compiler is free to optimize things either way or even remove them entirely (if it can do so unobservably). See, e.g., A nice explanation of memory stack vs. heap - #2 by sylvaticus and the subsequent posts.