6 months is a long time ago in Julia land. Since then, the standard Julia install is a minor version higher which makes -O3 optimization standard, has . syntax

6 months is a long time ago in Julia land. Since then, the standard Julia install is a minor version higher which makes -O3 optimization standard, has . syntax for automatic fused broadcasts (simple loop fusing for MATLAB-style vectorization), anonymous functions are orders of magnitude faster, Base has been slimmed and many new organizations like JuliaMath and JuliaDiffEq have been developed with new packages to enhance performance for these kinds of things. In Julia you can program really fast so the language (written in Julia) and the package ecosystem evolves fast as well. Code from 6 months ago is recognizably different (at least right now).