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https://issues.apache.org/jira/browse/ZOOKEEPER-472?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12765691#action_12765691
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Erik Holstad commented on ZOOKEEPER-472:
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@ Patrik Hunt, been waiting from someone to have a look at the patch for a 
little bit. The reason that I didn't mark it as patch available, was because
I got yelled at in the past, not here, for marking it like that when it hadn't 
been reviewed :) Will change the formatting to 4 spaces and upload again.

Erik 

> 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
>
>
> 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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