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https://issues.apache.org/jira/browse/BEAM-4863?focusedWorklogId=142379&page=com.atlassian.jira.plugin.system.issuetabpanels:worklog-tabpanel#worklog-142379
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ASF GitHub Bot logged work on BEAM-4863:
----------------------------------------

                Author: ASF GitHub Bot
            Created on: 08/Sep/18 00:01
            Start Date: 08/Sep/18 00:01
    Worklog Time Spent: 10m 
      Work Description: reuvenlax commented on a change in pull request #6057: 
[BEAM-4863] Implement consistentWithEquals/structuralValue on 
FullWindowedValueCoder
URL: https://github.com/apache/beam/pull/6057#discussion_r216112232
 
 

 ##########
 File path: 
sdks/java/core/src/main/java/org/apache/beam/sdk/util/WindowedValue.java
 ##########
 @@ -497,7 +497,7 @@ private void ensureWindowsAreASet() {
       // right, and cast the window type away here.
       @SuppressWarnings({"unchecked", "rawtypes"})
       Coder<Collection<? extends BoundedWindow>> collectionCoder =
-          (Coder) CollectionCoder.of(this.windowCoder);
 
 Review comment:
   I believe Dataflow looks at the coder id to determine compatibility (if the 
coder id has changed, it assumes the update is incompatible).

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Issue Time Tracking
-------------------

    Worklog Id:     (was: 142379)
    Time Spent: 1h 20m  (was: 1h 10m)

> Implement consistentWithEquals/structuralValue on FullWindowedValueCoder
> ------------------------------------------------------------------------
>
>                 Key: BEAM-4863
>                 URL: https://issues.apache.org/jira/browse/BEAM-4863
>             Project: Beam
>          Issue Type: Improvement
>          Components: sdk-java-core
>            Reporter: Luke Cwik
>            Assignee: Luke Cwik
>            Priority: Major
>          Time Spent: 1h 20m
>  Remaining Estimate: 0h
>
> Implementing *consistentWithEquals*/*structuralValue* boosts significantly 
> the performance of using these values in comparison operations since it 
> doesn't require encoding the values.



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