Native Implementation Functions - http://erlang.org/doc/tutorial/nif.html http://erlang.org/doc/tutorial/nif.html - Erlang/Elixir would not be performant enough

Native Implementation Functions - http://erlang.org/doc/tutorial/nif.html http://erlang.org/doc/tutorial/nif.html - Erlang/Elixir would not be performant enough to generate realtime video/audio encoding. It's possible to make them crash the VM if they leak memory or don't prempt when asked. In Rust you can make better guarantees about your code and there is this that allows you to write them in Rust: https://github.com/hansihe/rustler https://github.com/hansihe/rustler