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Posted to issues@kylin.apache.org by "jiatao.tao (JIRA)" <ji...@apache.org> on 2018/01/02 04:24:02 UTC

[jira] [Assigned] (KYLIN-3144) Adopt Collections.emptyList() for empty list values

     [ https://issues.apache.org/jira/browse/KYLIN-3144?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

jiatao.tao reassigned KYLIN-3144:
---------------------------------

    Assignee: jiatao.tao

> Adopt Collections.emptyList() for empty list values
> ---------------------------------------------------
>
>                 Key: KYLIN-3144
>                 URL: https://issues.apache.org/jira/browse/KYLIN-3144
>             Project: Kylin
>          Issue Type: Improvement
>            Reporter: Ted Yu
>            Assignee: jiatao.tao
>            Priority: Minor
>
> Use Collection.emptyList() for returning an empty list instead of returning new ArrayList<>().
> The default constructor creates a buffer of size 10 for ArrayList . Therefore, returning this static value saves some memory and lessens GC pressure.
> One candidate for replacement is in HybridService#listHybrids()



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