[Libreoffice-bugs] [Bug 137679] Implement a Kahan summation algorithm to reduce the numerical error in the total

[bugzilla-daemon at bugs.documentfoundation.org]

https://bugs.documentfoundation.org/show_bug.cgi?id=137679

--- Comment #56 from dante19031999 at gmail.com ---
(In reply to b. from comment #55)
> Created attachment 171782 [details]
> testsheet kahan_sum with different versions
> 
> I don't see this working well yet.  
>   
> see attached sheet.  
>   
> Status: correct results are possible, calc can't do it yet.  
>   
> I hope i haven't messed up my system? please check the results. if the
> pending patches solve the problem just ignore this comment.

No you haven't.
I believe the function in charge of summing columns is this one:
ArraySumFunctor::executeSSE2
However, that patch stills on review because it touches non trivial stuff.
It's the last one, but I believe it will take 1 week -2 months,
So, please wait until this is merged:
https://gerrit.libreoffice.org/c/core/+/115113
And then you should get the same results as the example attachment I've
uploaded.

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