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From "Andrew Wang (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HDFS-13601) Optimize ByteString conversions in PBHelper
Date Wed, 23 May 2018 02:12:00 GMT

    [ https://issues.apache.org/jira/browse/HDFS-13601?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16486602#comment-16486602
] 

Andrew Wang commented on HDFS-13601:
------------------------------------

I think this latest rev will pass precommit, and also incorporates Xiao's review comments.

> Optimize ByteString conversions in PBHelper
> -------------------------------------------
>
>                 Key: HDFS-13601
>                 URL: https://issues.apache.org/jira/browse/HDFS-13601
>             Project: Hadoop HDFS
>          Issue Type: Bug
>    Affects Versions: 3.1.0, 2.9.1
>            Reporter: Andrew Wang
>            Assignee: Andrew Wang
>            Priority: Major
>         Attachments: HDFS-13601.001.patch, HDFS-13601.002.patch, HDFS-13601.003.patch,
HDFS-13601.004.patch
>
>
> While doing some profiling of the NN with JMC, I saw a lot of time being spent on String->ByteString
conversions. These are often the same strings being converted over and over again, meaning there's
room for optimization.



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