TechNote (Archived)

Flex 1.5: Using taglib causes MXML to be recompiled on every request

Issue

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When you use Flex 1.5 taglib to include an MXML application and use the source attribute, Flex recompiles the MXML application on every request.

For example:

 <mm:mxml id="myapp" source="myapp.mxml" >     ...</mm:mxml> 

Reason

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This has been identified as Flex bug 109116. Due to this issue, Flex is not able to add the generated SWF to the cache and must therefore recompile the MXML on every request.

Solution

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To work around the problem, you should use a sub tag instead of the source attribute.

 <mm:mxml id="myapp" ><myapp xmlns:="*" /></mm:mxml> 

This will prevent Flex from recompiling the MXML on every request.

Search Support

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