Erik Holstad commented on ZOOKEEPER-472:

@ Patrik, sorry for not doing this yesterday, had some other stuff that I 
needed to take care of.  Yeah, that patch was created against an older branch, 
but I updated to trunk
in Eclipse and tested it before submitting it, but there seems to have been 
some issues with that.
This patch applied clean on trunk as of this morning using regular patch -p0


> Making DataNode not instantiate a HashMap when the node is ephmeral
> -------------------------------------------------------------------
>                 Key: ZOOKEEPER-472
>                 URL: https://issues.apache.org/jira/browse/ZOOKEEPER-472
>             Project: Zookeeper
>          Issue Type: Improvement
>          Components: server
>    Affects Versions: 3.1.1, 3.2.0
>            Reporter: Erik Holstad
>            Assignee: Erik Holstad
>            Priority: Minor
>             Fix For: 3.3.0
>         Attachments: zookeeper-472.patch, zookeeper-472.patch
> Looking at the code, there is an overhead of a HashSet object for that nodes 
> children, even though the node might be an ephmeral node and cannot have 
> children.

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