I don't know what you're trying to imply that Rust does, but I'll reiterate that Rust lifetimes don't exist at code generation time. They're not a runtime construct, they have zero influence over what code does at run time (e.g. mrustc compiler doesn't implement lifetimes, but bootstraps the whole Rust compiler just fine).
If you create `Vec<Object>` in Rust, then all objects will be allocated and laid out together as one contiguous chunk of memory, same as `malloc(sizeof(struct object) * n)` in C. You can also use `[Object; N]` or ArrayVec that's is identical to `struct object arr[N]`. It's also possible to use memory pools/arenas.
And where possible, LLVM will autovectorize operations on these too. Even if you use an iterator that in source code looks like it's operating on individual elements.
Knowing your other work I guess you mean SoA vs AoS? Rust doesn't have built-in syntax for these, but neither does C that we're talking about here.
