Ever since the news just prior to the Nexus 5 release that Google had been working on acquiring a company (FlexyCore) specializing in precompiling and optimizing apps, there's been a lot of myths and fantasies floating around about Dalvik changes in Android. Turns out, there's a bit of an Easter Egg hiding in Developer Options - ART - http://gigaom.com/2013/11/06/google...-potential-replacement-for-dalvik-in-android/ It's experimental and incomplete but it's there to play with if you like. http://source.android.com/devices/tech/dalvik/art.html I recommend a good backup before tinkering, check out Helium Backup if you're not rooted. Warning - this IS a developer option. Enjoy.