For parts of the game's logic where pure performance is paramount you can even drop down and write a gdextension in C++ or Rust (or a couple other languages tha

For parts of the game's logic where pure performance is paramount you can even drop down and write a gdextension in C++ or Rust (or a couple other languages that people maintain bindings for, or write new bindings for another language that can compile to a dylib/so/dll)