[jira] [Resolved] (RNG-104) SeedFactory seed creation performance analysis

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

     [ https://issues.apache.org/jira/browse/RNG-104?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Alex D Herbert resolved RNG-104.
--------------------------------
    Resolution: Done

JMH benchmarks added to master.

> SeedFactory seed creation performance analysis
> ----------------------------------------------
>
>                 Key: RNG-104
>                 URL: https://issues.apache.org/jira/browse/RNG-104
>             Project: Commons RNG
>          Issue Type: Task
>          Components: simple
>    Affects Versions: 1.3
>            Reporter: Alex D Herbert
>            Assignee: Alex D Herbert
>            Priority: Minor
>         Attachments: t1.jpg, t4.jpg, well_lock_vs_sync1.png, well_lock_vs_sync4.jpg, well_sync_performance.jpg, well_unfair_performance.jpg, well_unfair_vs_fair.jpg, xor_unfair_int1.png, xor_unfair_long1.png
>
>
> The SeedFactory is used to create seeds for the random generators. To ensure thread safety this uses synchronized blocks around a single generator. The current method only generates a single int or long per synchronisation. Analyze the performance of this approach. The analysis will investigate generating multiple values inside each synchronisation around the generator.
> This analysis will also investigate methods to supplement the SeedFactory with fast methods to create seeds. This will use a fast seeding method to generate a single long value. This can be a seed for a SplitMix generator used to create a seed of any length.
>  



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