iPhone6 & Plus ship dates down to a few days now...

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In other words, you need four or eight times more memory, than you are actually using to be super efficient. But when the memory becomes constrained, that performance goes way down.

This is why Android devices have all that RAM.

iOS does not use this style of garbage collection and does not slow down in constrained memory environments.

So 1GB for iOS results in more performance than 3GB for Android.

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With a modest boost in CPU clock speeds from 1.3GHz to 1.4GHz (an 8% speed-up), the 25% improvement obviously comes from various other tweaks and tricks. Before diving deeper in benchmarks, though, here is the place for a quick insert about clock speeds and the state of the industry. Commentators in forums are quick to point out the apparent inferiority of Apple clock speeds in comparison to the much faster speeds declared in rival Snapdragon and Exynos chips, for instance. The most up-to-date example is the Snapdragon 805 with a declared clock speed of ‘up to 2.7GHz’. At first sight, Apple’s Cyclone core looks like a sore loser with its declaration for just half that at 1.4GHz.

Most people would call it a day at this point - the Snapdragon outperforms the A8 hugely, case closed. This, however, would be naïve: running real-world applications and games shows instantly that the 2.7GHz speeds can only be achieved for a very short periods of time, but after those short outbursts, the chip quickly throttles back to the much more sane ~1.3GHz. Put simply, the 2.7GHz number that you read about is not the nominal frequency, but maxed out turbo speeds that are not sustainable for the long term. In fact, Apple is being much more truthful as it declares actual nominal (and not turbo) speeds for its chip, plus, the company goes on to disclose a second big thing about its chip: sustained performance times. Apple actually claims its A8 is capable of running flat at its nominal speeds for (at least) 20 minutes.

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Supply and demand 

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