iPhone 5 Performance - Fastest Smartphone

According to Anandtech.com, iPhone processor, A6 is an ARM-compatible system-on-a-chip, ARMv7 based, designed entirely by Apple. PCMag.com tested Web browser performance of A6 and its system performance, Then they were compared with previous iPhone and current Android phone, for the browser benchmarks: Sunspider, Browsermark, and Guimark 3 Bitmap. Sunspider is about JavaScript, Guimark is about interactive HTML5, and Browsermark is an overall browser benchmark. 

Phones	Processors
iPhone  5	A6
iPhone  4S	Dual-core 1G (underclocked to 800MHz) A5
iPhone  4	1GHz (underclocked to 800MHz) A4
iPhone 3GS	833 MHz (underclocked to 600 Mh) z ARM Cortex-A8
iPhone / iPhone 3G	620 MHz (underclocked to 412 MHz) ARM 1176JZ(F)-S
Samsung Galaxy S III	1.5GHz Qualcomm Snapdragon S4 (Dual – core Krait)
Motorola Droid RAZR M	1.5GHz Qualcomm Snapdragon S4 (Dual – core Krait)

The followings are PCMag.com's results: