[jira] [Commented] (HBASE-8180) [refGuide] Addition to performance.xml - use byte-array constants for CF, Cols

["Jean-Marc Spaggiari (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/HBASE-8180?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13611090#comment-13611090 ] 

Jean-Marc Spaggiari commented on HBASE-8180:
--------------------------------------------

I agree. Good to add an example.

There is a typo. surprsingly  => surprisingly
                
> [refGuide] Addition to performance.xml - use byte-array constants for CF, Cols
> ------------------------------------------------------------------------------
>
>                 Key: HBASE-8180
>                 URL: https://issues.apache.org/jira/browse/HBASE-8180
>             Project: HBase
>          Issue Type: Improvement
>            Reporter: Doug Meil
>            Assignee: Doug Meil
>         Attachments: performance_hbase_8180.xml.patch
>
>
> I realized that we don't have anywhere in the refGuide to use byte-array constants for CF and Column names.  Doing this .getBytes() in a loop (especially in a MapReduce job) is surprisingly expensive.  Adding to the performance chapter.  
> I am also going to update the other code examples in the book, but in another ticket.
> This is one of those "so obvious that it's not" kind of things.

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