[perf] Use lazy init for HashMap/HastSet where possible
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Key: MYFACES-3480
URL: https://issues.apache.org/jira/browse/MYFACES-3480
Project: MyFaces Core
Issue Type: Improvement
Reporter: Martin Kočí
Assignee: Martin Kočí
Priority: Minor
goal: make component tree creation fast as possible and avoid unnecessary
instances
some components instantialize attributes direct in field or in constructor. In
many cases it is not necessary, because those HashMap/Set instances are not
used in current request/response - it depends on use case.
Example: UIViewRoot.listenerSuccessMap: lazy init is very suitable, because
many view have no phase listener.
Check all components: candidates are "smarter" components like UIDate or UIInput
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