Bulk Operation

YARN-6242 Filter non-existent resource requests actively

YARN-6242 CapacityScheduler: Improvements to assignContainers, avoid unnecessary canAssignToUser/Queue calls

YARN-6242 ChildQueue can override AbstractCSQueue.hasChildQueues to return false always

YARN-6242 Improve performance of AssignmentInformation datastructures

YARN-6242 Eliminate double-copy of child queues in canAssignToThisQueue

YARN-6242 Avoid locking overhead for NO_LABEL lookups

YARN-6242 Reduce Resource instance overhead via non-PBImpl

YARN-6242 FairScheduler: FSLeafQueue.fetchAppsWithDemand CPU usage is high with big queues

YARN-6242 Add FinalResource object to reduce overhead of Resource class instancing

YARN-6242 CapacityScheduler: canAssignToThisQueue should be called only when necessary

YARN-6242 Make Collections.sort() more efficient by caching resource usage