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From "Anu Engineer (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HDFS-11712) Ozone: Reuse ObjectMapper instance to improve the performance
Date Wed, 03 May 2017 21:17:04 GMT

    [ https://issues.apache.org/jira/browse/HDFS-11712?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15995697#comment-15995697
] 

Anu Engineer commented on HDFS-11712:
-------------------------------------

+1, I will commit this shortly. Thank for making this improvement.


> Ozone: Reuse ObjectMapper instance to improve the performance
> -------------------------------------------------------------
>
>                 Key: HDFS-11712
>                 URL: https://issues.apache.org/jira/browse/HDFS-11712
>             Project: Hadoop HDFS
>          Issue Type: Sub-task
>          Components: ozone
>    Affects Versions: HDFS-7240
>            Reporter: Yiqun Lin
>            Assignee: Yiqun Lin
>         Attachments: HDFS-11712-HDFS-7240.001.patch, HDFS-11712-HDFS-7240.002.patch,
HDFS-11712-HDFS-7240.003.patch
>
>
> In the ozone, there are many places using {{ObjectMapper}} to do the object-json transformation.
From the page of {{ObjectMapper}} (https://github.com/FasterXML/jackson-docs/wiki/Presentation:-Jackson-Performance),
{{ObjectMapper}} is a heavy-weight object, it not a good bevahiour  to create this instance
everywhere.



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