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From "Thomas Neidhart (JIRA)" <j...@apache.org>
Subject [jira] [Resolved] (MATH-1221) Improve performance of ZipfDistribution by caching the nth harmonic
Date Fri, 01 May 2015 12:14:05 GMT

     [ https://issues.apache.org/jira/browse/MATH-1221?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Thomas Neidhart resolved MATH-1221.
-----------------------------------
       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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