[mpich-discuss] best/fastest way to get a node communicator

[Rhys Ulerich]

> Presumably you won't be hit by hash collisions indefinitely.  With a
> good hash function, you probably won't hit any collisions at all.
>
> It is likely not faster (as it is a bit chatty) but I've never
> measured it.  Nor implemented it.

And I'll admit I can easily cook hash functions that would break it.
A better test on that min/max test would be checking that min == max
== what you know about the hardware.

- Rhys