At ElixirConf EU 2025, José Valim delivered an exciting keynote outlining what's coming in Elixir 1.19 and beyond.

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Elixir 1.19 introduces compilation speed improvements up to 4x faster through lazy module loading and parallel dependency compilation. The type system evolves with a philosophy of finding bugs without requiring annotations, using decoupled type inference and checking. The release emphasizes interoperability with other ecosystems including Python, C++, and JavaScript through projects like PythonX, Fine, and AtomVM. Large projects will see immediate benefits from build time reductions, while the gradual typing approach preserves fast incremental compilation.

Elixir 1.19: Faster Builds, Smarter Types, and the Year of Interoperability

Type System Evolution: Finding Bugs for Free