JuliaLang/julia — comment on commit c7a48f642d4882990282fc4179493c9b841bba3d
File:  line 0
By StefanKarpinski:

Ah, true. But that's an inherent limitation of the language — you can't write an in-place sort. However, doesn't Matlab have a fancy compiler that should be able to figure out that it can do the sort in-place? Either way, it's still a fair comparison.