问题
I've observed that the default applications like People, Calculator.etc in Windows phones don't take time to load at all. They don't even have a Splash Screen image. I've tried excluding the SplashScreenImage.jpg from the project in my applications and run it on my phone, my application is static & just displays texts and still it takes time to load, why is it so? How can I make my applications to function like the default windows applications without waiting time and no SplashScreen images?
回答1:
Windows Phone 7
On Windows Phone 7 it's not possible to make a 3rd party app perform like the built-in apps such as People, Pictures, Calendar, Games, Music+Videos, etc.
Those apps are mostly likely written in C++ and are natively compiled, have special permission to run in the background (so they resume instantly), and have full OS/hardware access.
3rd party apps (ie. the apps you and I can write) are compiled against the Silverlight platform which is not as performant as natively compiled C++ code, which is why even a simple app with no splash screen and a single TextBlock will take longer to load than, say, the built-in Games app (and not feature the proper entrance animation).
So, all you can do is try and make your app startup as fast as possible, given the circumstances. There are 2 great links mentioned in the comments above and I'll add one more...
http://www.jeff.wilcox.name/2010/08/windows-phone-performance/
(It's from 2010 but the advice is still valid)
Windows Phone 8
Performance is a lot better on Windows Phone 8. Even an existing WP7 app will startup and run faster. But if you're starting a new app targeting WP8 only, then app startup is almost instant and you will get the proper 'entrance animation' when using the built-in Pivot and Panorama controls.
Which platform?
When choosing which version of Windows Phone to develop for and support, it helps to have real data to make your decision. Ad Duplex recently published some stats from a set of popular apps that run their ads on Windows Phone...
http://blog.adduplex.com/2013/09/adduplex-windows-phone-statistics.html
As you can see, Windows Phone 8 does make up the share of devices (up to 78%) in some markets, so it may be easier to start with WP8 - and you would definitely have less performance issues to worry about!
来源：https://stackoverflow.com/questions/18710740/how-to-make-a-windows-phone-application-load-faster-like-default-applications