Sunil G commented on YARN-6971:

Post YARN-6775, we use SimpleResource for Resource.newInstance().
So for all internal operations on Resource object, we could either use 
{{Resource.newInstance()}} or {{Resources. createResource()}}. YARN-3926 work 
is streamlining this in a cleaner way.

On that note, we need to use {{BuilderUtils.newResource()}} only in the case 
where we need to send the resource over rpc (communication between clients and 

Could you please share more details if I missed some points here.

> Clean up different ways to create resources
> -------------------------------------------
>                 Key: YARN-6971
>                 URL: https://issues.apache.org/jira/browse/YARN-6971
>             Project: Hadoop YARN
>          Issue Type: Improvement
>          Components: resourcemanager, scheduler
>            Reporter: Yufei Gu
>            Priority: Minor
>              Labels: newbie
> There are several ways to create a {{resource}} object, e.g., 
> BuilderUtils.newResource() and Resources.createResource(). These methods not 
> only cause confusing but also performance issues, for example 
> BuilderUtils.newResource() is significant slow than 
> Resources.createResource(). 
> We could merge them some how, and replace most BuilderUtils.newResource() 
> with Resources.createResource().

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