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From "Yan Zhou (JIRA)" <j...@apache.org>
Subject [jira] Commented: (PIG-1098) [zebra] Zebra Performance Optimizations
Date Tue, 01 Dec 2009 01:15:21 GMT

    [ https://issues.apache.org/jira/browse/PIG-1098?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12783976#action_12783976
] 

Yan Zhou commented on PIG-1098:
-------------------------------

As this patch is purely for performance improvements, there is no new test case created. So
Hudson's complain in that regard should be ignored.

> [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
>             Fix For: 0.6.0, 0.7.0
>
>         Attachments: PIG-1098.patch
>
>
> 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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