UIComponent passThroughAttributes implemented as ConcurrentHashMap. Why?

[javaserverfaces]

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From Kevin Jackson:

KJ> 1) In UIComponentBase, PassThroughAttributesMap is a ConcurrentHashMap. KJ> I see several other maps in this class and they are all ordinary KJ> HashMaps. Since ConcurrentHashMaps are so much heavier than HashMaps, KJ> there must be something that I am missing here. Why did you use a KJ> ConcurrentHashMap for pass thru attributes? From what I understand, the KJ> component tree can only be accessed from one thread at a time.

[javaserverfaces]

Reported by @edburns

[javaserverfaces]

Issue-Links: is related to JAVASERVERFACES-4020

[javaserverfaces]

This issue was imported from java.net JIRA JAVASERVERFACES-4019

[edburns]

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Ed Burns