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https://issues.apache.org/jira/browse/HBASE-9769?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13796430#comment-13796430
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Vladimir Rodionov commented on HBASE-9769:
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It contains check MAX_VERSIONS = 1 suggested by Lars (not sure if it is really
a hint?). Lars version gives improvements as well, but it relies on default
hint of MAX_VERSIONS and is slower I think. I completely eliminated
ExplicitColumnTracker from the code path. The more columns in a scan the more
is going to be performance difference, I think (again).
> Improve performance of a Scanner with explicit column list when rows are
> small/medium size
> ------------------------------------------------------------------------------------------
>
> Key: HBASE-9769
> URL: https://issues.apache.org/jira/browse/HBASE-9769
> Project: HBase
> Issue Type: Improvement
> Components: Scanners
> Affects Versions: 0.98.0, 0.94.12, 0.96.0
> Reporter: Vladimir Rodionov
> Assignee: Vladimir Rodionov
> Attachments: 9769-0.94-sample1.txt, 9769-0.94-sample2.txt,
> 9769-0.94-sample.txt, 9769-94.txt
>
>
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