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https://issues.apache.org/jira/browse/MATH-1221?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Thomas Neidhart resolved MATH-1221.
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Resolution: Fixed
Fix Version/s: 4.0
Fixed in commit bd5afc0b5a977c168cf046e3244477b48fa72c5d.
Not backported to 3.X to avoid serialization issues.
> Improve performance of ZipfDistribution by caching the nth harmonic
> -------------------------------------------------------------------
>
> Key: MATH-1221
> URL: https://issues.apache.org/jira/browse/MATH-1221
> Project: Commons Math
> Issue Type: Bug
> Reporter: Thomas Neidhart
> Fix For: 4.0
>
>
> The performance of pdf / cdf can be improved by caching the nth harmonic
> which is only dependeny on the distribution parameters.
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