iOS 6 beta 4 and a performance problem

  For almost 3 months I've only been using it iOS 6 on my iPhone 4S which of course doesn't have it jailbreak made. In these months I can say that I haven't had any major problems using the terminal, but for a few days I've noticed a rather strange problem. Sometimes the terminal starts moving hard, it takes a few seconds to exit an application or to end a call, it takes a few seconds to open a web page and everything started from scratch, without making any changes.

  Even if we are talking about 6 iOS beta, these problems appeared out of the blue two weeks after the update to iOS beta 6 4, so it's not about something that exists since its installation. I am curious if you have experienced something similar with your iDevices.