You can also use @code_native to look at the assembly code of any function, @code_lowered/@code_typed to see the Julia IR (which you can also modify before full

You can also use @code_native to look at the assembly code of any function, @code_lowered/@code_typed to see the Julia IR (which you can also modify before fully compiling, which is how source-to-source differentiation with Zygote works) and @code_warntype to evaluate the type inference result. This is a nice diagram of Julia's multi-stage compilation: https://blog.rogerluo.me/images/julia-compile-diagram.png https://blog.rogerluo.me/images/julia-compile-diagram.png