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https://issues.apache.org/jira/browse/HBASE-20509?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16459247#comment-16459247
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taiyinglee commented on HBASE-20509:
------------------------------------
Yes, there are some similar issues, I can add more fixes for this jira.
Thank you.
> putting List in HashSet directly without using addAll function to improve
> performance
> -------------------------------------------------------------------------------------
>
> Key: HBASE-20509
> URL: https://issues.apache.org/jira/browse/HBASE-20509
> Project: HBase
> Issue Type: Improvement
> Affects Versions: 3.0.0
> Reporter: taiyinglee
> Assignee: taiyinglee
> Priority: Trivial
> Attachments: HBASE-20509.v0.patch
>
>
> [https://docs.oracle.com/javase/7/docs/api/java/util/Collection.html]
> change
> Set<ServerName> serverSet = new HashSet<>();
> serverSet.addAll(serverList);
> to
> Set<ServerName> serverSet = new HashSet<>(serverList);
> in
> ./hbase-server/src/main/java/org/apache/hadoop/hbase/favored/FavoredNodeAssignmentHelper.java
>
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