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https://issues.apache.org/jira/browse/HBASE-24831?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Guanghao Zhang resolved HBASE-24831.
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Fix Version/s: 2.3.2
2.4.0
3.0.0-alpha-1
Resolution: Fixed
Pushed to branch-2.3+. Thanks [~chenyechao] for contributing.
> Avoid invoke Counter using reflection in SnapshotInputFormat
> -------------------------------------------------------------
>
> Key: HBASE-24831
> URL: https://issues.apache.org/jira/browse/HBASE-24831
> Project: HBase
> Issue Type: Improvement
> Reporter: Yechao Chen
> Assignee: Yechao Chen
> Priority: Major
> Labels: Performance, mapreduce, snapshot
> Fix For: 3.0.0-alpha-1, 2.4.0, 2.3.2
>
>
> In TableRecordReaderImpl we invoke Counter increment by reflection
> This will be called nextKeyValue() in TableSnapshotInputFormat
> reflection invoke is very slower than normal method call
> we can avoid these to improve the read performance
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