hadoop-hdfs-issues mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From "Suresh Srinivas (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HDFS-5191) revisit zero-copy API in FSDataInputStream to make it more intuitive
Date Thu, 12 Sep 2013 18:14:16 GMT

    [ https://issues.apache.org/jira/browse/HDFS-5191?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13765720#comment-13765720
] 

Suresh Srinivas commented on HDFS-5191:
---------------------------------------

bq. The overhead of using varargs seems excessive (up to 30x timing wise and way more garbage
created for the temp arrays using Sun JDK 1.6.0.39) for a performance API.
While varargs might be expensive, in the context of current API, I do not think the cost you
are alluding to seems exaggerated. That said, from clean API perspective, if an EnumSet can
get the job done, it might be better.
                
> revisit zero-copy API in FSDataInputStream to make it more intuitive
> --------------------------------------------------------------------
>
>                 Key: HDFS-5191
>                 URL: https://issues.apache.org/jira/browse/HDFS-5191
>             Project: Hadoop HDFS
>          Issue Type: Sub-task
>          Components: hdfs-client, libhdfs
>    Affects Versions: HDFS-4949
>            Reporter: Colin Patrick McCabe
>            Assignee: Colin Patrick McCabe
>
> As per the discussion on HDFS-4953, we should revisit the zero-copy API to make it more
intuitive for new users.

--
This message is automatically generated by JIRA.
If you think it was sent incorrectly, please contact your JIRA administrators
For more information on JIRA, see: http://www.atlassian.com/software/jira

Mime
View raw message