[
https://issues.apache.org/jira/browse/HBASE-16648?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15508357#comment-15508357
]
Hiroshi Ikeda commented on HBASE-16648:
---------------------------------------
That result seems natural. The atomicity of ConcurrentHashMap.computeIfAbsent
is useful for, for example, establishing network connections, which are not
easily excessively executed and immediately discarded. The atomicity apparently
requires non-trivial logic and overhead but is indispensable for some cases,
excluding just creating light objects.
> [JDK8] Use computeIfAbsent instead of get and putIfAbsent
> ---------------------------------------------------------
>
> Key: HBASE-16648
> URL: https://issues.apache.org/jira/browse/HBASE-16648
> Project: HBase
> Issue Type: Sub-task
> Components: Performance
> Affects Versions: 2.0.0
> Reporter: Duo Zhang
> Assignee: Duo Zhang
> Fix For: 2.0.0
>
> Attachments: HBASE-16648-v1.patch, HBASE-16648-v2.patch,
> HBASE-16648.patch
>
>
--
This message was sent by Atlassian JIRA
(v6.3.4#6332)
