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https://issues.apache.org/jira/browse/MESOS-5978?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15405510#comment-15405510
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Anindya Sinha commented on MESOS-5978:
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RR posted https://reviews.apache.org/r/50738/
> Improve run time for arithmetic operators for Resources
> -------------------------------------------------------
>
> Key: MESOS-5978
> URL: https://issues.apache.org/jira/browse/MESOS-5978
> Project: Mesos
> Issue Type: Improvement
> Components: general
> Reporter: Anindya Sinha
> Assignee: Anindya Sinha
> Priority: Minor
> Labels: external-volumes, persistent-volumes
>
> Resource arithmetic concerning += and -= operators needs to be improved such
> that the impact of shared resources is minimal. Following is the observation
> of Resources_BENCHMARK_Test.Arithmetic.
> Head
> ====
> Resources benchmark on top of 6ce156b2bed7edecb27ce50f68d262ea4ab4f88e
> [ RUN ] ResourcesOperators/Resources_BENCHMARK_Test.Arithmetic/0
> Took 72228us to perform 50000 'total += r' operations on cpus(*):1;
> gpus(*):1; mem(*):128; disk(*):256
> Took 101574us to perform 50000 'total -= r' operations on cpus(*):1;
> gpus(*):1; mem(*):128; disk(*):256
> Took 251715us to perform 50000 'total = total + r' operations on cpus(*):1;
> gpus(*):1; mem(*):128; disk(*):256
> Took 293414us to perform 50000 'total = total - r' operations on cpus(*):1;
> gpus(*):1; mem(*):128; disk(*):256
> Pre-shared resources
> =================
> Resources benchmark on top of 48a492cd9d7d0a194735b9b4107a35b489c596e1
> [ RUN ] ResourcesOperators/Resources_BENCHMARK_Test.Arithmetic/0
> Took 48583us to perform 50000 'total += r' operations on cpus(*):1;
> gpus(*):1; mem(*):128; disk(*):256
> Took 86166us to perform 50000 'total -= r' operations on cpus(*):1;
> gpus(*):1; mem(*):128; disk(*):256
> Took 233148us to perform 50000 'total = total + r' operations on cpus(*):1;
> gpus(*):1; mem(*):128; disk(*):256
> Took 265719us to perform 50000 'total = total - r' operations on cpus(*):1;
> gpus(*):1; mem(*):128; disk(*):256
> 'total += r' run time sees 40% jump. (I've run these 10 times and took an
> average, the avg is 48685.4us (pre-shared resources) vs. 68421.7us
> (post-shared resources).
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