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https://issues.apache.org/jira/browse/HBASE-28055?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17762283#comment-17762283
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Tak-Lon (Stephen) Wu commented on HBASE-28055:
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merged into master , will do branch-2 tomorrow.
> Performance improvement for scan over several stores.
> ------------------------------------------------------
>
> Key: HBASE-28055
> URL: https://issues.apache.org/jira/browse/HBASE-28055
> Project: HBase
> Issue Type: Bug
> Affects Versions: 3.0.0-alpha-4, 2.5.5
> Reporter: Sergey Soldatov
> Assignee: Sergey Soldatov
> Priority: Major
>
> During the fix of HBASE-19863, an additional check for fake cells that
> trigger reseek was added. It comes that this check produces unnecessary
> reseeks because
> matcher.compareKeyForNextColumn should be used only with indexed keys. Later
> [~larsh] suggested doing a simple check for OLD_TIMESTAMP and it looks like a
> better solution.
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