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https://issues.apache.org/jira/browse/STORM-1152?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14983247#comment-14983247
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ASF GitHub Bot commented on STORM-1152:
---------------------------------------

Github user hmcl commented on a diff in the pull request:

    https://github.com/apache/storm/pull/836#discussion_r43548584
  
    --- Diff: storm-core/src/jvm/backtype/storm/utils/TransferDrainer.java ---
    @@ -30,18 +31,20 @@
       private HashMap<Integer, ArrayList<ArrayList<TaskMessage>>> bundles = 
new HashMap();
       
       public void add(HashMap<Integer, ArrayList<TaskMessage>> 
taskTupleSetMap) {
    -    for (Integer task : taskTupleSetMap.keySet()) {
    -      addListRefToMap(this.bundles, task, taskTupleSetMap.get(task));
    +    for (Map.Entry<Integer, ArrayList<TaskMessage>> entry : 
taskTupleSetMap.entrySet()) {
    +      Integer task = entry.getKey();
    +      addListRefToMap(this.bundles, task, entry.getValue());
    --- End diff --
    
    Perhaps this could be simplified to  addListRefToMap(this.bundles, 
entry.getKey(), entry.getValue());


> Change map keySet iteration to entrySet iteration for efficiency
> ----------------------------------------------------------------
>
>                 Key: STORM-1152
>                 URL: https://issues.apache.org/jira/browse/STORM-1152
>             Project: Apache Storm
>          Issue Type: Improvement
>          Components: storm-core
>            Reporter: Suresh Srinivas
>            Assignee: Suresh Srinivas
>            Priority: Minor
>
> Many places keySet iteration is used where entrySet iteration would avoid 
> unnecessary key lookup.



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