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https://issues.apache.org/jira/browse/YARN-6418?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15950091#comment-15950091
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Arun Suresh commented on YARN-6418:
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[~leftnoteasy], given the work done on YARN-6040. I understand you had
performed some profiling on the scheduler and identified a couple of places you
found the PBImpl object instantiation was getting a bit expensive, so would be
interested in your thoughts here as well.
> Reduce Resource object creation and overhead in Capacity scheduler inner loop
> -----------------------------------------------------------------------------
>
> Key: YARN-6418
> URL: https://issues.apache.org/jira/browse/YARN-6418
> Project: Hadoop YARN
> Issue Type: Improvement
> Components: capacityscheduler, resourcemanager
> Affects Versions: 2.7.3, 3.0.0-alpha2, 2.8
> Reporter: Roni Burd
> Assignee: Roni Burd
>
> Resource object is used multiple due to ResourceCalculator creates new
> instances on every method call. This gets called several times on each node
> HB. Resource is a very expensive object that relies on Protobufs
> The change is to remove the need to use protobuf on the Resource object and
> avoid creating many objects in the Resource Calculator all the time
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