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https://issues.apache.org/jira/browse/HBASE-7868?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Matteo Bertozzi updated HBASE-7868:
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Attachment: hfileperf-graphs.png
attached a graph extracted from HFilePerformanceEvaluation. Aside from strange
runs the average seems to say that 92 is still faster than 94 and 94 with
metrics commented out from HFileReaderV2, is way faster then 94
> 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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