Yan Zhou commented on PIG-1098:

This pacth is also targeted for the 0.6 release so it needs to be on the 0.6 
branch too. 

> [zebra] Zebra Performance Optimizations
> ---------------------------------------
>                 Key: PIG-1098
>                 URL: https://issues.apache.org/jira/browse/PIG-1098
>             Project: Pig
>          Issue Type: Improvement
>            Reporter: Yan Zhou
>            Assignee: Yan Zhou
>            Priority: Minor
> Many in-core performance optimization opportunities exist in zebra, such as 
> removal of redundant precautionary checks, use of better collection types to 
> reduce levels of indirection to the memory objects, changing of input splits 
> in ascending sizes to descending sizes. Observed protyped improvements are 
> around 10% wall clock time improvements.

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