D Mir: standard deviation speed

[9il]

On Wednesday, 15 July 2020 at 06:55:51 UTC, 9il wrote:
> On Wednesday, 15 July 2020 at 06:00:46 UTC, tastyminerals wrote:
>> On Wednesday, 15 July 2020 at 02:08:48 UTC, 9il wrote:
>>> On Tuesday, 14 July 2020 at 19:04:45 UTC, tastyminerals wrote:
>>>> @fastmath private double sd0(T)(Slice!(T*, 1) flatMatrix)
>>>
>>> @fastmath shouldn't be really used with summation algorithms 
>>> except the `"fast"` version of them. Otherwise, they may or 
>>> may not behave like "fast".
>>
>> Good to know. So, it's fine to use it with sum!"fast" but 
>> better avoid it for general purposes.
>
> They both are more precise by default.

This was a reply to the other your post in the thread, sorry. Mir 
algorithms are more precise by default then the algorithms you 
have provided.