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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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Jean-Marc Spaggiari updated HBASE-7868:
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    Attachment: HFilePerformanceEvaluation.txt

Matteo, can you retry?

Attached is the logs logs for the HFilePerformanceEvaluation. I have not found 
any noticable degradation of the performances between any of the releases. 

I have not done the charts and only looked at the values (greped by test name), 
but it seems to be pretty stable. Anything I missed?
                
> HFile performance regression between 0.92 and 0.94
> --------------------------------------------------
>
>                 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
>             Fix For: 0.94.7
>
>         Attachments: FilteredScan.png, hfileperf-graphs.png, 
> HFilePerformanceEvaluation.txt, performances.pdf, performances.pdf
>
>
> By HFilePerformanceEvaluation seems that 0.94 is slower then 0.92
> Looking at the profiler for the Scan path, 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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