Iterate delimited file as NamedTuples

@Tamas_Papp Could you also post the code that uses a numerical index with the NamedTuple? Seems really strange that that would be faster…

The implementation that uses getiterator is allocating a lot more memory (about an order of magnitude). I’m trying to find out why that is, but I’m running in this https://github.com/JuliaLang/julia/issues/21838