Simple performance question from a newcomer

[ixid via Digitalmars-d-learn]

On Tuesday, 23 February 2016 at 14:07:22 UTC, Marc Schütz wrote:
> On Tuesday, 23 February 2016 at 11:10:40 UTC, ixid wrote:
>> We really need to standard algorithms to be fast and perhaps 
>> have separate ones for perfect technical accuracy.
>>
>
> While I agree with most of what you're saying, I don't think we 
> should prioritize performance over accuracy or correctness. 
> Especially for numerics people, precision is very important, 
> and it can make a just as bad first impression if we don't get 
> this right. We can however make the note in the documentation 
> (which already talks about performance) a bit more prominent: 
> http://dlang.org/phobos/std_algorithm_iteration.html#sum

Wouldn't it be better to have technically perfect implementations 
for those numerics people? Sum is a basic function that almost 
everyone may want to use, this is a factor of four slowdown for 
the sake of one user group who could be perfectly well served by 
a sub-library that contains high-accuracy versions. It might make 
sense if the speed difference were only a few percent.