[jira] [Resolved] (RNG-155) ZigguratNormalizedGaussianSampler to use a table size of 256

["Alex Herbert (Jira)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/RNG-155?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Alex Herbert resolved RNG-155.
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    Resolution: Implemented

Added in commit

d5ea18a19209e53f783ef6ec79c17fc8e2a10a6f

> ZigguratNormalizedGaussianSampler to use a table size of 256
> ------------------------------------------------------------
>
>                 Key: RNG-155
>                 URL: https://issues.apache.org/jira/browse/RNG-155
>             Project: Commons RNG
>          Issue Type: Improvement
>          Components: sampling
>    Affects Versions: 1.3
>            Reporter: Alex Herbert
>            Priority: Trivial
>             Fix For: 1.4
>
>
> The ZigguratNormalizedGaussianSampler uses a table size of 128. The source paper provides constants for a table size of 256. This table size brings a small performance gain as the table is used for more of the sampling and the rejection algorithm for sampling at the edge of the ziggurat is used less.
> The JMH examples module contains an implementation of the 256 size table for performance testing (see [RNG-152]). I suggest swapping the implementations so the 128 table size is in the examples and the 256 table size is in the main sampling package.



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