Thomas Heigl created WICKET-6833:
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Summary: 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
My profiler shows a significant amount of allocations and list resizing coming
from {{PageParameters.mergeWith}}.
The method unnecessarily creates {{ArrayList}}s, {{TreeSet}}s, 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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