Back in April 2011, Joe Belfiore, Director of the Windows Phone program
 and Android browser on Samsung’s Nexus S by running HTML5 speed reading demo.
In that test, Internet Explorer 9 mobile with hardware acceleration support had surprised us by blowing away Mobile Safari and Android browser in the performance test.
, which is one of the latest Windows Phone. So YouTube user with the handle 359gsm has compared an iPhone 4S running iOS 5 with Lumia 800 running Windows Phone 7.5 and also an iPhone 4 running iOS 4.3.
iPhone 4 (iOS 4.3) – 37 503
Nokia Lumia 800 (WP7.5 aka Mango) – 30 452
iPhone 4 (iOS 4.3) – 2 fps (iPhone 4 with iOS 5.0 – around 37 fps)
Nokia Lumia 800 (WP7.5 aka Mango) – 40 fps
iPhone 4 (iOS 4.3) – 4018.2 ms
Nokia Lumia 800 (WP7.5 aka Mango) – 7188.7 ms
iPhone 4 (iOS 4.3) – 100/100
Nokia Lumia 800 (WP7.5 aka Mango) – 100/100
iPhone 4 (iOS 4.3) – 210
Nokia Lumia 800 (WP7.5 aka Mango) – 141
As you can see, iPhone 4S running iOS 5 blows away the Nokia Lumia 800 running Windows Phone 7.5. Even the iPhone 4 running an older version of iOS – iOS 4.3 performs better than the Nokia Lumia 800.