So i upgraded my iPad to ios7 and suddenly some of my games became very slow. Asphalt 8 specially was slow like hell. Airplay became slow. Every thing was slow.

To solve this:

For Expert: Just do a fresh restore :)

For Newbie:

1) First connect your ios device to your computer and start iTunes.

2) Take a force backup just to be sure nothing is screwed

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3) Now you do a fresh restore.  Just click on the button as shown below and wait for the magic to happen.

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4) Once the ios device is restored it will ask you to restore to an old backup. Select that option and you are done.!