pbacsko opened a new pull request, #553:
URL: https://github.com/apache/yunikorn-core/pull/553

   ### What is this PR for?
   We can avoid cloning the Resource object in `Application.tryNodes()`. On a 
busy cluster where nodes are full, the "fit in" score calculation runs very 
often, resulting in allocating a lot of resource objects constantly. 
   
   
   ### What type of PR is it?
   * [ ] - Bug Fix
   * [x] - Improvement
   * [ ] - Feature
   * [ ] - Documentation
   * [ ] - Hot Fix
   * [ ] - Refactoring
   
   ### Todos
   * [ ] - Task
   
   ### What is the Jira issue?
   https://issues.apache.org/jira/browse/YUNIKORN-1770
   
   ### How should this be tested?
   
   ### Screenshots (if appropriate)
   
   ### Questions:
   * [ ] - The licenses files need update.
   * [ ] - There is breaking changes for older versions.
   * [ ] - It needs documentation.
   


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