Why does it take a substantially long time for some of my applications to open? Once I open them, they are quick and responsive. Usually after some time, they go back to being slow. I have plenty of memory and space. I also have aggressive battery killing on here, so I imagine that some of these applications are being killed by Android after they are not used for a while. But that does not explain what makes, for example, GroupOn take exactly 8 seconds to open every single time I use the phone. This makes the DX experience worse. Why is this happening? What can I do?