Right, It can currently precompile to some extent, but full source-to-binary-blob-compilation is on the roadmap. See here: http://juliacomputing.com/blog/2016/02/09/static-julia.html

Julia's runtime includes its compiler and full huge standard lib, but of which are eventually going to be split off, IIUC.

The former because of static compilation potential and the latter into modules that can be included piecemeal.