Julia is JITed, but not in the same sense that (say) JavaScript is. It's more like a very lazy AOT compiler – and it can certainly hold its own against Fortran.

Julia is JITed, but not in the same sense that (say) JavaScript is. It's more like a very lazy AOT compiler – and it can certainly hold its own against Fortran. That's not to say it has every optimisation it could, but the JIT is not the bottleneck there. 1.0 will be out around midway through the year, so that will ease the growing pains.