The implementation is an improved version of what we now have in the D standard library. I'll take up the task of updating phobos at a later time.https://www.reddit.com/r/programming/comments/6bwsjn/fast_deterministic_selection_sea_2017_now_with/Andrei
Very nice! Is this materially faster than what is currently in Phobos (PR 4815)? That update was a substantial performance win by itself.