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https://issues.apache.org/jira/browse/PIG-802?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12711811#action_12711811
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Pradeep Kamath commented on PIG-802:
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I think even in the future if ReadOnceBags are used in places other than order
by, they would need to be used immediately after a POPackageLite. So tying the
two together is not bad and would reduce code duplication.
> PERFORMANCE: not creating bags for ORDER BY
> -------------------------------------------
>
> Key: PIG-802
> URL: https://issues.apache.org/jira/browse/PIG-802
> Project: Pig
> Issue Type: Improvement
> Affects Versions: 0.2.0
> Reporter: Olga Natkovich
> Attachments: OrderByOptimization.patch
>
>
> Order by should be changed to not use POPackage to put all of the tuples in a
> bag on the reduce side, as the bag is just immediately flattened. It can
> instead work like join does for the last input in the join.
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