By Jason Snell Macworld.com | on October 12, 2011
Price When Reviewed: £349 unlocked . From free on contract
Apple is never going to win a competition with the wildest imaginations of tech bloggers. But the company seems to be doing OK in the business of building phones, as the iPhone 4S proves.
Like the iPad 2 before it, the iPhone 4S is powered by an Apple-designed A5 processor. This is a dual-core processor that’s one generation more advanced than the A4 processor that powered the iPhone 4 and the original iPad.
Two processor cores don’t necessarily mean the iPhone 4S is twice as fast as the iPhone 4—that has a lot to do with how efficiently a device’s software can take advantage of spreading the workload across both cores. But the 4S’s upgraded processor definitely provides a large speed boost, akin to the upgrade from the original iPad to the iPad 2.
The results of my general-performance tests showed the iPhone 4S to be roughly twice as fast as the iPhone 4. Apple claims graphics performance on the iPhone 4S has been boosted even more by the graphics component of the A5, with speed gains of as much as 7x. That’s a best-case scenario, but my tests with the GLBench Pro graphics benchmarking app did show enhanced graphics performance. One 3D test sequence played at roughly five times the frame rate of the same scene on the iPhone 4; another was roughly double the frame rate.
Of course, many people won’t be upgrading to the iPhone 4S from the iPhone 4, due to those pesky two-year phone contracts that cell carriers insist on. But a whole lot of people will be upgrading from two-year-old iPhone 3GSes. 3GS users will see an even larger speed increase, of course. The 4S had more than double the score on the GeekBench testing app, and loaded a test webpage in a third of the time.
The only iOS device in existence that can match up—and even beat—the iPhone 4S is the iPad 2. In most of my tests, the iPad 2 was slightly faster than the iPhone 4S. (The original iPad was similarly faster than the iPhone 4, in fact.) Of course, the iPad 2 doesn’t fit in your pocket, unless you have unusually large pockets or are a clown, or both.
Apple claims that talk time on the iPhone 4S’s battery is actually an hour longer than on the iPhone 4, but that Wi-Fi surfing will drain the battery an hour sooner. Apple says that the innards of the iPhone 4S have been entirely redesigned—so many components have changed, there’s no simple explanation for the change in the company’s battery-life claims. It seems clear, though, that some components are more energy efficient than on the iPhone 4 (I’m looking at you, cellular radio) while others eat more power (dual-core A5 processor).
The end result is a phone that offers largely the same battery life as the iPhone 4. However, I didn’t get a chance to run any dedicated battery tests on the iPhone 4S. In general usage, it didn’t seem to run out of battery any faster than my trusty iPhone 4.