I have a radix sort implementation at https://github.com/nordlow/justd/blob/master/intsort.d#L92intsort.d
which beats Phobos own Quicksort by a factor 1.5 to 4 depending on element type (Intergral or FloatingPoint).
Anyone up for the job of adapting and merging it into Phobos' std.algorithm.sorting?
See also: https://github.com/Xinok/XSort/issues/1#issuecomment-96321466
