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https://issues.apache.org/jira/browse/PIG-1270?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13156591#comment-13156591
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Min Zhou commented on PIG-1270:
-------------------------------
sorry, some mistakes
||case||job cost time||HDFS bytes read||Average time taken by Map tasks||Worst
performing map task||
|w/o optimization|26 sec|19,347,931,305|3 sec|5 sec|
|w/ optimization|24 sec|12,976,128|1 sec|1 sec|
> Push limit into loader
> ----------------------
>
> Key: PIG-1270
> URL: https://issues.apache.org/jira/browse/PIG-1270
> Project: Pig
> Issue Type: Bug
> Components: impl
> Affects Versions: 0.7.0
> Reporter: Daniel Dai
> Assignee: Daniel Dai
> Attachments: PIG-1270-1.patch, PIG-1270-2.patch, PIG-1270-3.patch
>
>
> We can optimize limit operation by stopping early in PigRecordReader. In
> general, we need a way to communicate between PigRecordReader and execution
> pipeline. POLimit could instruct PigRecordReader that we have already had
> enough records and stop feeding more data.
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