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Posted to issues@hbase.apache.org by "stack (JIRA)" <ji...@apache.org> on 2018/11/01 16:07:00 UTC

[jira] [Updated] (HBASE-19682) Use Collections.emptyList() For Empty List Values

     [ https://issues.apache.org/jira/browse/HBASE-19682?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

stack updated HBASE-19682:
--------------------------
       Resolution: Fixed
     Hadoop Flags: Reviewed
    Fix Version/s: 2.2.0
                   3.0.0
           Status: Resolved  (was: Patch Available)

Pushed to branch-2 and master. Thank you for the nice cleanup [~belugabehr] 

> Use Collections.emptyList() For Empty List Values
> -------------------------------------------------
>
>                 Key: HBASE-19682
>                 URL: https://issues.apache.org/jira/browse/HBASE-19682
>             Project: HBase
>          Issue Type: Improvement
>    Affects Versions: 3.0.0
>            Reporter: BELUGA BEHR
>            Assignee: BELUGA BEHR
>            Priority: Minor
>             Fix For: 3.0.0, 2.2.0
>
>         Attachments: HBASE-19682.1.patch, HBASE-19682.2.patch, HBASE-19682.3.1.patch, HBASE-19682.4.patch, HBASE-19682.5.patch, HBASE-19682.6.patch, HBASE-19682.7.patch, example.patch
>
>
> Use {{Collection.emptyList()}} for returning an empty list instead of {{return new ArrayList<> ()}}.  The default constructor creates a buffer of size 10 for _ArrayList_ therefore, returning this static value saves on some memory and GC pressure and saves time not having to allocate a new internally buffer for each instantiation.



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