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https://issues.apache.org/jira/browse/HBASE-7868?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13580183#comment-13580183
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Matteo Bertozzi commented on HBASE-7868:
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[~jmspaggi] the latest one (bench done this morning, git pull)
but since, the hotspot is SchemaMetrics and the performance regression can be
seen just by looking at hfile, my guess is that is all 0.94.
Anyway if you want you can start looking at the performances pre HBASE-6852.
> HFile performance regression 92/94
> ----------------------------------
>
> Key: HBASE-7868
> URL: https://issues.apache.org/jira/browse/HBASE-7868
> Project: HBase
> Issue Type: Bug
> Components: io
> Affects Versions: 0.94.5
> Reporter: Matteo Bertozzi
> Assignee: Matteo Bertozzi
> Attachments: hfileperf-graphs.png
>
>
> By HFilePerformanceEvaluation seems that 0.94 is slower then 0.92
> Looking at the profiler seems that most of the time, compared to 92, is spent
> in the metrics dictionary lookup. [~eclark] pointed out the new per
> family/block metrics.
> By commenting the metrics call in HFileReaderV2, the performance seems to get
> better, but maybe metrics is not the only problem.
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