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https://issues.apache.org/jira/browse/STATISTICS-54?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17709663#comment-17709663
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Gilles Sadowski commented on STATISTICS-54:
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bq. [...] accept the specific statistics [...] slows add operation because we
are evaluating some conditionals [...]
Potentially yes, and quite certainly for small streams. However, if the flags
are "final", then hopefully the JIT compiler will remove the conditionals. I
would not worry (too much) about this kind of performance issue if the
selection of statistics is a feature that we want.
A perhaps more serious issue is that a "merge" will not be possible between two
instances if their selection of statistics was not the same...
Perhaps a more promising route is to split the feature set:
# High-level API ({{SummaryStatistics}}-like) that computes everything.
# Low-level utility functions that, given the current value of the statistics
and new data (and possibly other pre-computed intermediate results), compute
the new value. Of course, if given inconsistent arguments, it will compute
nonsense...
> [GSoC] Summary statistics API for Java 8 streams
> ------------------------------------------------
>
> Key: STATISTICS-54
> URL: https://issues.apache.org/jira/browse/STATISTICS-54
> Project: Commons Statistics
> Issue Type: Wish
> Components: descriptive
> Reporter: Alex Herbert
> Priority: Minor
> Labels: full-time, gsoc, gsoc2022, gsoc2023
> Fix For: 1.0
>
>
> Placeholder for tasks that could be undertaken in this year's
> [GSoC|https://summerofcode.withgoogle.com/].
> Ideas:
> - Design an updated summary statistics API for use with Java 8 streams based
> on the summary statistic implementations in the Commons Math
> {{stat.descriptive}} package including {{{}moments{}}}, {{rank}} and
> {{summary}} sub-packages.
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