For example if you want to show a window containing thumbnails on user click, do not embed or load them on application initialize, just load them when user clicks to show that window.

Loading external content:- Do not embed content that’s not required immediately to be shown as application initializes Load assets at runtime.

Add a ModuleLoader component into your main mxml where you want the component to appear and set the url property.

Create new module by going to File -> New -> MXML Module.

This way you can reduce the file size and improve application performance. And you can load them after some delay or later when required.

Modules:- Create modules of components that are not required immediately or are optional for the application.

This file once downloaded will be used for all your swf files running on that Computer afterwards. Remember to change the “link Type” to “Runtime Shared Library (RSL)”. Now your selected folder path starts appearing in “Build path Libraries”. GO to Project -> Properties -> Flex Build Path -> Library Path and Add folder containing swc file. Now to add this library to your projects :

Create SWC file of your common code:- If you are using some common classes that are used in many of your flex projects or different swf files then Create a Library Project of your commonly used classes.

Check that by using your website paths to framework if it can be saved to your disk then its fine else get it fixed first from you web administrator. One most important thing is that you must have swz file extension added to your webserver. Now you must copy this file to your webserver along with your swf file from where it can be downloaded. Now application compiles and creates a framework (swz) file along with swf file looks like framework_3.swz. Implementing RSL is very easy :GOTO Project -> Properties -> Flex Build Path -> Library Path and select “Runtime Shared Library (RSL)” from the “Framework linkage” combobox. RSL simply reduces the file size by approximately 500kb. The advantage of RSL is that it’s downloaded once only.

Implement RSL in your Project – Runtime Shared Libraries:- Its a flex framework library which contains files required during runtime of flex application.Let’s discuss these six main areas to improve our flex(Flash builder) application:

These best techniques when followed in flex project will result in improved performance, smaller swf and less memory consumption. I have identified out some major areas that can be focused to optimize the flex application size. Don’t worry its quite easy and possible to reduce the file size of flex (Flash builder) created swf’s. So you are developing flex applications and are worried by larger swf files created by flex. Optimize Flex SWF filesize performance loading AugPosted by Tournas Dimitrios in Flex.

Flex moduleloader