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https://issues.apache.org/jira/browse/CASSANDRA-5884?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13739564#comment-13739564
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Marcus Eriksson commented on CASSANDRA-5884:
--------------------------------------------
yep, looks good
> Improve offheap memory performance
> ----------------------------------
>
> Key: CASSANDRA-5884
> URL: https://issues.apache.org/jira/browse/CASSANDRA-5884
> Project: Cassandra
> Issue Type: Improvement
> Components: Core
> Reporter: T Jake Luciani
> Assignee: T Jake Luciani
> Fix For: 2.0.1
>
> Attachments: memfix.txt, memperf.txt
>
>
> Currently getting data to and from offheap is slow due to individual calls to
> getByte() and putByte()
> The following patch makes this a single call and is 10x faster
> {code}
> benchmark:
> [java] 0% Scenario{vm=java, trial=0, benchmark=GetBytesOld} 82266.48
> ns; σ=2532.87 ns @ 10 trials
> [java] 50% Scenario{vm=java, trial=0, benchmark=GetBytesNew} 7876.95 ns;
> σ=489.78 ns @ 10 trials
> [java]
> [java] benchmark us linear runtime
> [java] GetBytesOld 82.27 ==============================
> [java] GetBytesNew 7.88 ==
> [java]
> [java] vm: java
> [java] trial: 0
> {code}
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