使用Xcode 6在iOS 8模拟器下缓慢的应用程序性能

After upgraded to xcode 6 I found that when I run my app under iOS 8 in iOS simulator, it ran very slowly, no matter when I choose iPhone or iPad. But if I choose it to run under iOS 7 it ran normally. I was thinking that it was an app/coding related problem so then I tried to deploy it on my ipad with iOS8 and strangely the app run normally, not as slow as simulator does Does anybody on SO experience this issue?After upgraded to xcode 6 I found that when I r