[jira] Assigned: (HIVE-720) Improve ByteStream by removing all synchronized method calls

["Zheng Shao (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/HIVE-720?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Zheng Shao reassigned HIVE-720:
-------------------------------

    Assignee: He Yongqiang

> Improve ByteStream by removing all synchronized method calls
> ------------------------------------------------------------
>
>                 Key: HIVE-720
>                 URL: https://issues.apache.org/jira/browse/HIVE-720
>             Project: Hadoop Hive
>          Issue Type: Improvement
>            Reporter: Zheng Shao
>            Assignee: He Yongqiang
>         Attachments: HIVE-720.1.patch, HIVE-720.2.patch
>
>
> org.apache.hadoop.hive.serde2.ByteStream has 2 inner classes: Input and Output, which inherits from ByteArrayInputStream and ByteArrayOutputStream.
> Both these classes have a lot of sychronized methods, which make them really slow.
> We should let ByteStream.Input and ByteStream.Output directly inherit InputStream and OutputStream so we don't need to call synchronized methods at all. This will help LazySimpleSerDe, ColumnarSerDe as well as LazyBinarySerDe.

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