Performance penalty using transformers inside mapper

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Hi,
I new to webmethod developing using the integrated server,
Are there a performance penalty using transformers inside a mapper?

(My reviewer reject my flows for this reason :frowning: but I did not find any best practices warning me about it)

Thanks a lot in advance,
RAFS

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This has been covered in discussions in the past. You might find this thread helpful.

[URL]wmusers.com

Bottom line: There is no meaningful performance difference any longer (starting with 6.x); Disallowing transformers solely for performance concerns is a misplaced idea. There is no point in tuning a service that is a small part of the overall execution footprint. Performance concerns should always be addressed by measuring, determining if performance is not sufficient for a given integration, determining where the bottleneck is and then tuning that bottleneck. Trying to optimizing code before knowing these things is hit and miss, more often miss.

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RAFS,

There might be few reasons your reviewer didn’t like the transformers in map step:

-For consistency sake, i.e. companies have there own best practices which defines the way their developer should code. This includes naming conventions too.
-For readability purpose because it is easy to walk to through the flow service if services are used separately rather in map steps.
-There is no guarantee of the order transformers will execute services in MAP step.

I personally like using transformers in MAP step because it reduces the amount of code and there is no performance penalty that I know of. So I guess it all boils up to your preference and way of coding.