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From "Heng Chen (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-16659) Use CellUtil.createFirstOnRow instead of KeyValueUtil.createFirstOnRow in some places.
Date Tue, 20 Sep 2016 10:10:20 GMT

    [ https://issues.apache.org/jira/browse/HBASE-16659?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15506245#comment-15506245
] 

Heng Chen commented on HBASE-16659:
-----------------------------------

It seems KeyValueUtil.createFirstOnRow is used in many places,  all should be replaced?

> Use CellUtil.createFirstOnRow instead of KeyValueUtil.createFirstOnRow in some places.

> ---------------------------------------------------------------------------------------
>
>                 Key: HBASE-16659
>                 URL: https://issues.apache.org/jira/browse/HBASE-16659
>             Project: HBase
>          Issue Type: Improvement
>            Reporter: binlijin
>            Assignee: binlijin
>            Priority: Minor
>         Attachments: HBASE-16659-master.patch, HBASE-16659-master_v2.patch
>
>
> CellUtil.createFirstOnRow is more effective than KeyValueUtil.createFirstOnRow, because
there is no byte[] copy.
> Current in ReversedRegionScannerImpl#nextRow, to get the previous row to seek, it use
KeyValueUtil.createFirstOnRow which will have two copy, the first copy is copy to a tmp byte[],
the second copy is in KeyValue. We can use CellUtil.createFirstOnRow which will have no copy.



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