iPhone 4S iOS 9.2.1 vs iOS 7.1.2 Speed Test

So we have learned that iOS 9.2.1 is fast, and is faster than iOS 8.4.1 on the 4S.. But what about if we go one more release back, and compare it against iOS 7.1.2 also on the iPhone 4S.\r
Lets see how 7.1.2 compares against the latest and greatest iOS 9.2.1 Build 13D15.\r
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See iOS 9.2.1 vs 9.2 videos for release notes.\r
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Music is by Gunnar Olsen, Tracks in this video Tremsz, Good to Go and Never Sleep