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Why copy stage is better than transformer?

Incase of only dropping columns(without any transformations or business rules), we can go for copy stage instead of transformer.But can anyone tell me exactly why copy stage is better in performance than transformer?
Asked by: Jothi D | Member Since May-2012 | Asked on: May 29th, 2012

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kkreddy

Answered On : Jul 1st, 2012

Copy stage is a passive stage and Transformer is Active and it involves the process usage and copy does not . So its good to go with copy since it takes less time then transformer to propagate the columns over the link

  
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Atangel

Answered On : Oct 12th, 2012

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Transformer is a heavier stage as apart from the orchestrate we do have the C++ operators for various derivations. Right from compilation to execution a Transformer will always take more time than a copy stage which is a simple straight forward passive(if we can call) stage

  
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