Hello.

Le lun. 25 oct. 2021 à 18:09, Alex Herbert <alex.d.herb...@gmail.com> a écrit :
>
> Many of the issues within [statistics] have now been resolved. There
> are some remaining issues that are linked to the gamma functions in
> [numbers]:

Thanks for these accuracy and performance enhancements.

> [...]
>
> [1] https://issues.apache.org/jira/browse/STATISTICS-38
> [2] https://issues.apache.org/jira/browse/STATISTICS-39
> [3] 
> https://www.boost.org/doc/libs/1_77_0/libs/math/doc/html/math_toolkit/sf_gamma/igamma.html
> [4] https://issues.apache.org/jira/browse/NUMBERS-171
> [5] https://issues.apache.org/jira/browse/NUMBERS-172
>

There is also
  https://issues.apache.org/jira/browse/NUMBERS-167
that definitely should entail a performance gain not achievable with the
current API (a single "static" function).
As discussed in the comments, it seems that the required functionality
would kludge the existing class(es); so I wondered whether we should
keep those untouched (except for improving the implementation) and
provide an alternative API in new (factory) classes that would call and
cache the low-level "static" functions.

Regards,
Gilles

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