[jira] [Assigned] (HIVE-21611) Date.getTime() can be changed to System.currentTimeMillis()

["Hunter Logan (Jira)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/HIVE-21611?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Hunter Logan reassigned HIVE-21611:
-----------------------------------

    Assignee: Hunter Logan

> Date.getTime() can be changed to System.currentTimeMillis()
> -----------------------------------------------------------
>
>                 Key: HIVE-21611
>                 URL: https://issues.apache.org/jira/browse/HIVE-21611
>             Project: Hive
>          Issue Type: Bug
>            Reporter: bd2019us
>            Assignee: Hunter Logan
>            Priority: Major
>              Labels: pull-request-available
>         Attachments: 1.patch
>
>          Time Spent: 20m
>  Remaining Estimate: 0h
>
> Hello,
> I found that System.currentTimeMillis() can be used here instead of new Date.getTime().
> Since new Date() is a thin wrapper of light method System.currentTimeMillis(). The performance will be greatly damaged if it is invoked too much times.
> According to my local testing at the same environment, System.currentTimeMillis() can achieve a speedup to 5 times (435 ms vs 2073 ms), when these two methods are invoked 5,000,000 times.



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