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https://issues.apache.org/jira/browse/PIG-49?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Olga Natkovich resolved PIG-49.
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Resolution: Won't Fix
> optimize bag usage
> ------------------
>
> Key: PIG-49
> URL: https://issues.apache.org/jira/browse/PIG-49
> Project: Pig
> Issue Type: Improvement
> Reporter: Olga Natkovich
>
> (1) Currently, we always bring the entire bag into memory even though in most
> cases we just need to stream through it. This is very inefficient in terms of
> memory and CPU usage.
> (2) If we are doing multiple computations on the same group, we iterate over
> the bag that represents the group several times. This is very inefficient
> especially for spilled bags.
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