Fast App Switching does exist on 256 MB Windows Phones

Even though early specifications of the limitations of low-end devices (256 MB) stated that Fast App Switching (FAS) would not be available – it actually is! It’s just so much less likely to happen because of the memory limitations. The updated MSDN documentation explains it as: Fast Application Switching is supported on 256-MB devices. However, because keeping applications in a dormant state for Fast Application Switching is dependent on the phone’s available memory, an application running on 256-MB devices will be terminated and tombstoned more often and more quickly than the same application running on a phone with more memory.

I first came on to this when holding the back key in the 256 MB emulator – it gave me the regular FAS view where I could flip between apps. After a moment of confusion I came to the conclusion that they must’ve kept the app switch view but are just letting apps always tombstone. Then, in a twitter conversation with Ginny Caughey, she told me that FAS does exist on 256 MB phones, but is less likely to occur since the phone will run out of memory. I had to try it out…

First I created two small apps that just display if their Activated-event had IsApplicationInstancePreserved, and holding the back key confirmed the obvious; none of them has their instance preserved on startup.

fas_applist    fas_appswitch

But, when resuming app number 1 the FAS was confirmed.

fas_fas_to_one    fas_after_one

Nicely done Microsoft! The ability to be able to jump back and forth between apps is a great improvement over the pre-Mango behavior of having to back into an app to be able to resume it. This way of handling FAS on low-end devices is a very nice compromise, especially the apps have been written to handle tombstone nicely, and they all have right?…

7 Responses to “Fast App Switching does exist on 256 MB Windows Phones”

  1. [...] tot vijf volkomt, daar is de documentatie dan weer niet helemaal duidelijk over. Andreas Hammer van JayWay Team nam de proef eens op de som en maakte speciaal om dit te testen twee mini appjes die weinig [...]

  2. [...] la nuova versione del sistema operativo di Microsoft e la funzionalità del Fast App Switching. Andreas Hammar ha voluto indagare se i 256 MB di memoria RAM standard per i prossimi Windows Phone economici [...]

  3. [...] per i device con 256 MB di RAM contenuto nel nuovo SDK 7.1.1; per questo vi rimando al seguente link. Posted: 28 mar 2012 8:46 da Paolo | con no comments Inserito sotto: WindowsPhone7 // [...]

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