Elixir vs. Erlang benchmarks - is one faster than the other?

[idi527]

See

http://erlang.org/doc/reference_manual/records.html
https://groups.google.com/d/msg/elixir-lang-talk/6kn7J2XnFg8/n-r3NUaCHwAJ

Choosing between maps, structs, records etc

Think of records as glorified tuples. When you need to handle multiple different tuples, which are private to a module, records work great. Maps would also work in the example above, but they wouldn’t give the compile time guarantee of records. Structs would be too wasteful though for those cases. Those data structures are never really “exported”, so using multiple modules for representing them is quite unnecessary.

I think they are implemented slightly differently in elixir, though.
https://hexdocs.pm/elixir/Record.html

But structs are generally much nicer to work with because they are maps and not tuples. For example, IIRC cowboy 2.0 moved from using records to represent its Req object to maps. But from reading its (as well as ranch and cowlib) source code I got a feeling that cowboy was striving for completeness and ease of use rather than performance.