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https://issues.apache.org/jira/browse/WICKET-6833?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Thomas Heigl resolved WICKET-6833.
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Fix Version/s: 9.1.0
Resolution: Fixed
> Reduce allocations when merging page parameters
> -----------------------------------------------
>
> Key: WICKET-6833
> URL: https://issues.apache.org/jira/browse/WICKET-6833
> Project: Wicket
> Issue Type: Improvement
> Components: wicket-core
> Affects Versions: 9.0.0
> Reporter: Thomas Heigl
> Assignee: Thomas Heigl
> Priority: Major
> Fix For: 9.1.0
>
>
> My profiler shows a significant amount of allocations and list resizing
> coming from {{PageParameters.mergeWith}}.
> The method unnecessarily creates {{ArrayLists}}, {{TreeSets}}, unmodifiable
> wrappers, and does not size the underlying list of {{NamedPair}} correctly
> when merging page parameters with multiple values.
> It can be called hundreds of times per request for applications with a high
> number of mounted pages and resources.
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