1. Optimizing Your
Windows Phone
Mango Applications
Jinho.Seo@microsoft.com
Microsoft Korea

2. Application Certification Requirements
 1. Application Policies
 2. Content Policies
 3. Application Submission Requirements
 4. Technical Certification Requirements
 5. Additional Requirements for Specific
Application Types

3. Submission and Certification Process
http://msdn.microsoft.com/en-
us/library/hh184843(v=vs.92).aspx

4. Application Submission Requirements
 4.1 Installation Package Validation
 4.2 Application Code Validation
 4.3 Phone Capabilities Detection
 4.4 Language Validation
http://msdn.microsoft.com/en-
us/library/hh184844(v=vs.92).aspx

5. Technical Certification Requirements
 5.1 Application Reliability
 5.2 Performance and Resource Management
 5.3 Phone Functionality
 5.4 Security
 5.5 Content Validation
http://msdn.microsoft.com/en-
us/library/hh184840(v=vs.92).aspx

6. Additional Requirements for Specific
Application Types
 6.1 Location Aware Application
 6.2 Push Notifications Application
 6.3 Applications Running under a Locked Screen
 6.4 Music + Videos Hub Application
 6.6 Applications That Extend the Picture Viewer
 6.7 Applications That Extend the Share Picker
 6.8 Applications That Extend the Pictures Hub
 6.9 Applications That Play or Stream Background Audio
 6.10 Applications That Use Background Transfer
http://msdn.microsoft.com/en-
us/library/hh184838(v=vs.92).aspx

7. Mango Improvements
 1. General Runtime Improvements
 Examples:
 Faster, more responsive scrolling
 Lower memory footprint
 Better video playback
 2. Improved Default Behaviors For 7.1 Apps
 Examples:
 Fast-App-Switching
 Better XAML Parser
 3. New Optional Behaviors For 7.1 Apps

8. 32 Bits-Per-Pixel Rendering
 7.0 supports only 16 bpp rendering
 banding in gradients
 In Mango the default is still 16 bpp
 Apps can opt-into 32 bpp in the manifest
 Recommended if your app wants to show
 Photos
 Designs with gradients
 Video apps get opt’ed in automatically

9. Demo - 32 bpp vs. 16
bpp

10. Background Image Decoding
 In 7.0 image decode happens on UI thread
 May result in stuttering, non-responsive UI
 7.1 apps can opt-into background decode
<Image x:Name="myBackgroundDecodedImage">
<Image.Source>
<BitmapImage UriSource="http://www.foo.com/bar.jpg"
CreateOptions="BackgroundCreation"/>
</Image.Source>
</Image>

11. Demo - Image
Decoding
http://msdn.microsoft.com/en-us/library/ff967560(v=vs.92).aspx

12. Media and Objects
 Supported Media Codecs for Windows Phone
 http://msdn.microsoft.com/en-
us/library/ff462087(v=vs.92).aspx
 Set Build Action to Content for Media
 Hiding and Display Objects
 Visibility vs. Opacity
 User Input
 Use Manipulation Events
http://msdn.microsoft.com/en-
us/library/ff426933(VS.95).aspx

13. Progress Bar, WebSerivces
 Use PerformanceProgressBar instead of
ProgressBar
 Use HttpWebRequest instead of WebClient
 Application Startup
 Understanding Threads
 Identifying Performance Issues for Graphics-
Intensive Applications
 http://msdn.microsoft.com/en-
us/library/ff967560(v=vs.92).aspx

14. Memory Testing
 First: Design your app with memory in mind
 Monitor your memory usage
 Test with real word data
 Consider monitoring your “heavy” objects
 Page instances
 UserControl instances
 Data objects that participate in binding
 Tiny UI leak can cause entire visual tree to be
leaked
 Use the 7.1 Profiling Tools

15. Demo – Memory
Testing

16. Control Your App With Sockets
 Use socket APIs to connect to your desktop
computer
 This can be useful for testing/debugging
scenarios:
 Monitoring app metrics (such as memory/heap
objects)
 Logging messages/results
 Controlling the app workflow

17. End-To-End Testing
 Navigating through the entire app
 State and visuals are correct
 No leaks and no crashes
 Investing in an automated script may pay off
 Do the math
 Consider your test matrix
 Think about stability (memory and stress testing)
 Write code with testing in mind

18. Demo – End-To-End
Testing

19. Windows Phone Marketplace
Test Kit
 Objectives : Protect to fail submission process
 http://msdn.microsoft.com/en-
us/library/hh394032(v=vs.92).aspx