binlijin commented on HBASE-16659:

I find some other places that we can use CellUtil.createFirstOnRow instead of 
KeyValueUtil.createFirstOnRow, which is more effective.

> Minor improvement in ReversedRegionScannerImpl
> ----------------------------------------------
>                 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
> 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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