Hey i think i came across something very useful. first i have to say if your app is big, split it up into modules. and also use rsl. now i came across this in the flex help. have not tried it yet but it looks like it might help brind down the size of the modules. here it is
Reducing module size Module size varies based on the components and classes that are used in the module. By default, a module includes all framework code that its components depend on, which can cause modules to be large by linking classes that overlap with the application's classes. To reduce the size of the modules, you can optimize the module by instructing it to externalize classes that are included by the application. This includes custom classes and framework classes. The result is that the module includes only the classes it requires, while the framework code and other dependencies are included in the application. To externalize framework classes with the command-line compiler, you generate a linker report from the application that loads the modules. You then use this report as input to the module's load-externs compiler option. The compiler externalizes all classes from the module for which the application contains definitions. This process is also necessary if your modules are in a separate project from your main application in Flex Builder. Create and use a linker report with the command-line compiler Generate the linker report and compile the application:mxmlc -link-report=report.xml MyApplication.mxml The default output location of the linker report is the same directory as the compiler. In this case, it would be in the bin directory. Compile the module and pass the linker report to the load-externs option:mxmlc -load-externs=report.xml MyModule.mxml
