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https://issues.apache.org/jira/browse/STORM-1152?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14983260#comment-14983260
 ] 

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_r43549300
  
    --- Diff: 
storm-core/src/jvm/storm/trident/spout/OpaquePartitionedTridentSpoutExecutor.java
 ---
    @@ -162,9 +162,9 @@ public void commit(TransactionAttempt attempt) {
                 
                 Long txid = attempt.getTransactionId();
                 Map<String, Object> metas = _cachedMetas.remove(txid);
    -            for(String partitionId: metas.keySet()) {
    -                Object meta = metas.get(partitionId);
    -                
_partitionStates.get(partitionId).rotatingState.overrideState(txid, meta);
    +            for(Entry<String, Object> entry: metas.entrySet()) {
    +                Object meta = entry.getValue();
    --- End diff --
    
    Unless the variable is created to make the code easier to read, this could 
be simplified to   
_partitionStates.get(entry.getKey()).rotatingState.overrideState(txid,  
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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