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From "Todd Lipcon (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (HBASE-5915) Improve performance of KeyValue comparison
Date Wed, 02 May 2012 07:59:00 GMT

     [ https://issues.apache.org/jira/browse/HBASE-5915?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Todd Lipcon updated HBASE-5915:
-------------------------------

    Attachment: hbase-5915.txt

Here's the patch and micro-benchmark.

Would be curious if people can poke holes in it (or show with a more realistic workload if
it makes a difference)
                
> Improve performance of KeyValue comparison
> ------------------------------------------
>
>                 Key: HBASE-5915
>                 URL: https://issues.apache.org/jira/browse/HBASE-5915
>             Project: HBase
>          Issue Type: Improvement
>          Components: performance
>    Affects Versions: 0.94.1
>            Reporter: Todd Lipcon
>            Assignee: Todd Lipcon
>         Attachments: hbase-5915.txt
>
>
> Got bored tonight and poked around at making KeyValue comparison faster. I was able to
get a ~23% speedup on a micro-benchmark I wrote by using Unsafe in a few more places. This
should make some difference for real workloads, since this is usually one of the top CPU consumers.

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