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Table of Contents

  1. Introduction
  2. Architecting Flex Applications That Perform Well
  3. A Note About Flash Players
  4. Using Layouts, Hierarchy, and Containment Properly
  5. Examples of Common Container Redundancies to Avoid
  6. Using Deferred Instantiation to Improve Perceived Performance
  7. Handling Large Data Sets
  8. Playing Complex Effects Smoothly
  9. Achieving Great Performance with Runtime Styles
  10. Using Dynamically Repeating Controls for Better Performance
  11. Improving a Repeater Object's Performance
  12. Improving Performance of Charting Components
  13. Performance Tuning and Profiling Your Own Flex Application
  14. Using Runtime Shared Libraries (RSLs)
  15. Feedback and Support

Flex Application Performance: Tips and Techniques for Improving Client Application Performance

A Note About Flash Players

Before going into techniques for preventing common performance issues, ensure that you have installed Macromedia Flash Player 7 (7.0.14 or 7.0.19 or later). Flash Player is a multiple-platform client that lets users interact with Flash content. There are two types of players, the Flash Player release version and the Flash Debug Player version. The Flash Debug Player version is best used during the development phase, because it enables the Flex debugging and profiling features. Since most users use the release version of Flash Player, use this version to do performance tuning; running Flex applications with the Flash Debug Player version does not accurately represent the performance of your application. When running a SWF file, the Flash Debug Player version reports trace statements and warnings. This task requires ActionScript processing cycles that would otherwise resource a running application, which impacts the perceived application performance.

When you are ready to test application performance, verify you are running the application with Flash Player 7, the release version. Many Flex application developers make this simple mistake! To verify the version of Flash Player, run a Flex application in the browser you use during development, and then right-click inside the browser window. If you see a debug option in the context menu, you are running the Flash Debug Player version. If you fine-tune your application to perform well with the Flash Debug Player version, you can ensure that your application will perform the same, if not significantly better, with Flash Player 7.

For more on using the Flash Debug Player to debug client-side code, read Debugging Client-Side Code in Flex Applications.

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