[Haskell] Re: [Fwd: Re: Computer Language Shootout]

[Florian Weimer]

> Also, the SML version uses Vectors, "polymorphic vectors, immutable
> sequences with constant-time access". I wonder how immutable these are.
> I suspect that changing elements does updates in place with history
> tracking?

SML vectors in the standard basis library are truly immutable, and no
history tracking for updates is available.  The full source code of
their experiment is not contained in the paper, so it's hard to tell
what they were doing (and if the speed difference would be as
pronounced today).