Elixir performance similar to Go? That's stretching it a bit. Elixir is fast within its own niche - network I/O - but it's a dynamic language so can't compete with Go on, say, heavy calculations or other CPU-intensive tasks. Elixir doesn't even have a vector data structure, relying instead on Erlang's very clunky offering.
yes I agree its not as great at cpu intensive stuff. but most people are using go in networked applications where network I/O IS the bottleneck
that said, elixir has excellent interrop with rust via rustler for when you need those heavy caclulations. and I trust a rust implementation long before I'll trust one in go.
and as far as lacking a vector data structure, sure but there's been a lot of work into Nx. who cares about a vector data structure when you have a full power numerical processing library complete with tensors! and unlike python, you can combine it with genstage and broadway to do all kinds of crazy shit.