C++ Ranges proposal for the Standard Library

Sat Oct 18 01:58:20 PDT 2014

On Saturday, 18 October 2014 at 08:21:47 UTC, eles wrote:
> On Saturday, 18 October 2014 at 05:54:01 UTC, Ola Fosheim 
> Grøstad wrote:
>> On Saturday, 18 October 2014 at 04:35:07 UTC, Walter Bright 
>> wrote:
>
>> Larger mantissa can help a little bit, but only a little bit.
>
> https://en.wikipedia.org/wiki/Kahan_summation_algorithm

As that article also points out (IIRC), you can got pretty good 
results by divide-and-conquer without any extra work.