While Microsoft's upcoming Windows Phone 7 NoDo update will bring application start and resume improvements (see our videoview here) as well as Microsoft confirmed that it will bring fast application switching with Mango, Windows Phone 7's next major upgrade, windows phone hacker has found and interesting way to improve pre-NoDo and pre-Mango's application instant resuming with a simple registry hack. According to windows phone hacker, this hack disables the "resuming" phase when returning to a previously opened application and therefore it allows to jump back straight to where the application was left. In a more technical aspect, this evidently disables the dehydration function of the task host.
As the video above shows, it means that - thanks to the hack - it's possible to jump between applications, text messages and lock screens without having to wait for the application to reload.
However, as with all registry hacks, this change is not for the average user and has - according to windows phone hacker - some undesirable, though not crippling, not further described side effects.
The big question is why Microsoft hasn't enabled this feature by default? It either causes some massive problems under certain circumstances or Microsoft had something different in mind. In any case, it definitely improves the user experience since it feels to make Windows Phone 7 faster.
Cheers ~ Arne