cassandra-commits mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From "T Jake Luciani (JIRA)" <>
Subject [jira] [Created] (CASSANDRA-5884) Improve offheap memory performance
Date Tue, 13 Aug 2013 16:09:47 GMT
T Jake Luciani created CASSANDRA-5884:

             Summary: Improve offheap memory performance
                 Key: CASSANDRA-5884
             Project: Cassandra
          Issue Type: Improvement
          Components: Core
            Reporter: T Jake Luciani
            Assignee: T Jake Luciani
             Fix For: 2.0.1
         Attachments: memperf.txt

Currently we 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

     [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]   benchmark    us linear runtime
     [java] GetBytesOld 82.27 ==============================
     [java] GetBytesNew  7.88 ==
     [java] vm: java
     [java] trial: 0

This message is automatically generated by JIRA.
If you think it was sent incorrectly, please contact your JIRA administrators
For more information on JIRA, see:

View raw message