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https://issues.apache.org/jira/browse/MATH-1219?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Gilles Sadowski updated MATH-1219:
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Fix Version/s: (was: 4.0)
4.X
> Improve performance of TournamentSelection for large populations
> ----------------------------------------------------------------
>
> Key: MATH-1219
> URL: https://issues.apache.org/jira/browse/MATH-1219
> Project: Commons Math
> Issue Type: Improvement
> Reporter: Thomas Neidhart
> Priority: Major
> Fix For: 4.X
>
> Attachments: MATH-1219.patch
>
>
> The TournamentSelection can become quite slow when using large populations.
> The implemented algorithm clones the original population and picks randomly
> some chromosomes from it. Everytime a chromosome has been picked, it is also
> removed from this population.
> When assuming that the chosen arity << population size, it is usually faster
> to repeat the picking.
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