The compiler is definitely doing more work overall in 1.19.X, so make sure you’re leveraging the MIX_OS_DEPS_COMPILE_PARTITION_COUNT env var, described here: elixir/CHANGELOG.md at v1.19 · elixir-lang/elixir · GitHub
If the compilation is still longer overall after setting that value to around half your cores, I’d open a bug, as I don’t think that’s expected.
