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https://issues.apache.org/jira/browse/HBASE-2450?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12913754#action_12913754
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ryan rawson commented on HBASE-2450:
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i did some tests, and it overall this patch is a net win. When the data is
very dense, it slows things down very slightly, eg 60.7ms vs 59.25ms for scans.
In a 1 column out of 100 scan, the performance improvement was big - 6.1ms
becomes 3.9ms with the new code.
> For single row reads of specific columns, seek to the first column in HFiles
> rather than start of row
> -----------------------------------------------------------------------------------------------------
>
> Key: HBASE-2450
> URL: https://issues.apache.org/jira/browse/HBASE-2450
> Project: HBase
> Issue Type: Improvement
> Components: io, regionserver
> Reporter: Jonathan Gray
> Assignee: Pranav Khaitan
> Fix For: 0.90.0
>
>
> Currently we will always seek to the start of a row. If we are getting
> specific columns, we should seek to the first column in that row.
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