Apple does not even list the new iPhone 4S' internal technical specs -- RAM, graphics performance, and processor speed -- on the iPhone's "Tech Specs" page. Reports have surfaced, though, which suggest it's basically the same on the inside as an iPad 2. Arnold Kim of MacRumors notes it has the same Apple A5 processor and 512 MB of RAM as an iPad 2, but "is likely underclocked" to 800 MHz compared to the iPad's 1 GHz speed. The underclocking may be necessary in order to fit such a powerful processor into a smartphone chassis (and have reasonable battery life).
So how does an iPad in an iPhone's body stack up to the current crop of Android smartphones and "superphones?" As it turns out, unbelievably well. According to benchmarks compiled by Anand Lal Shimpi and Brian Klug of Anandtech, a stock iPhone 4S outperforms pretty much every phone on the market out of the box.
Graphics -- Rendering Egypt offscreen
The 2.1 version of an app called GLBenchmark forces smartphones and tablets to render graphics onto an offscreen canvas, roughly the size of a laptop monitor. The original iPhone 4 was at the bottom of the benchmarks, rendering the scene at only 11.2 frames per second -- slowly enough to be noticed as choppy. Slightly above it was the Nexus S -- a single-core superphone -- then the LG Optimus 3D, the 10.1 inch Samsung Galaxy Tab, and the Motorola Droid Bionic. The Samsung Galaxy S 2 was the only real standout from the Android pack, but the iPhone 4S beat it handily, rendering the scene at over 70 frames per second compared to about 40. Only the iPad 2 beat it, due to its higher clock speed.
Browser performance
The "Sunspider" Javascript test is a measure of how well a device can handle (non-Flash) interactive web pages. Older smartphones like the original Nexus One and the iPhone 3GS took about 5 seconds to render the test page, while the iPhone 4 beat out even the Galaxy S 2 at 3.5 seconds. The iPhone 4S, on the other hand, took only 2.2 seconds, and was just barely beat out by the 8.9 inch Galaxy Tab (the iPad 2 did not appear in the test results).
Processor speed
Processor benchmarking seemed to confirm the theory that the iPhone 4S is clocked at 800 MHz. Its dual-core processor was benchmarked as having almost double the power of the old iPhone 4, though, which had a single-core 800 MHz processor.
Android devices were not compared in the processor speed benchmarking, but the iPhone 4S beat them all by a mile in every other measurement.
Jared Spurbeck is an open-source software enthusiast, who uses an Android phone and an Ubuntu laptop PC. He has been writing about technology and electronics since 2008.
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