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https://issues.apache.org/jira/browse/HBASE-12040?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14153402#comment-14153402
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Andrew Purtell commented on HBASE-12040:
----------------------------------------
Let me add that I did a comparison yesterday between 3645223 [4 weeks ago]
(tag: 0.98.6RC2, tag: 0.98.6) Update CHANGES.txt for 0.98 and c220be9 [3 days
ago] (HEAD, 0.98) HBASE-12110 Fix .arcconfig [Elliott Clark] and I didn't see a
significant difference. However I have been using the local filesystem not
HDFS, and Hadoop 2.2 not Hadoop 2.4, so I will try again today with a setup
closer to Nick's above. *If* I can get repeatable results that show a
significant difference I'll be able to bisect to an implicated commit.
> Performances issues with FilteredScanTest
> ------------------------------------------
>
> Key: HBASE-12040
> URL: https://issues.apache.org/jira/browse/HBASE-12040
> Project: HBase
> Issue Type: Bug
> Affects Versions: 0.99.1
> Reporter: Jean-Marc Spaggiari
> Priority: Critical
> Attachments: at-HBASE-11331.html, pre-HBASE-11331.html,
> ycsb-0.98.6.1-vs-0.98.7.pdf
>
>
> While testing 0.99.0RC1 release performances, compared to 0.98.6, figured
> that:
> - FilteredScanTest is 100 times slower;
> - RandomReadTest is 1.5 times slower;
> - RandomSeekScanTest is 3.2 times slower;
> - RandomScanWithRange10Test is 1,2 times slower;
> - RandomScanWithRange100Test is 1,3 times slower;
> - RandomScanWithRange1000Test is 4 times slower;
> - SequentialReadTest is 1,7 times slower;
> - SequentialWriteTest is just a bit faster;
> - RandomWriteTest is just a bit faster;
> - GaussianRandomReadBenchmark is just a beat slower;
> - SequentialReadBenchmark is 1,1 times slower;
> - SequentialWriteBenchmark is 1,1 times slower;
> - UniformRandomReadBenchmark crashed;
> - UniformRandomSmallScan is 1,3 times slower.
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