The additional memory will give the iPhone 4 much more robust multitasking, an Apple hardware expert said today.
Although MacRumors first reported the story Thursday morning, Computerworld independently confirmed the Phone 4's additional memory.
According to MacRumors, iPhone developers were told last week of the memory boost at Apple's annual developers conference, where CEO Steve Jobs unveiled the iPhone. The new model is slated to go on sale June 24.
In iOS 4, which will launch on Monday, software like Skype or Pandora will be able to take incoming VoIP calls or play tunes while other applications are in the forefront. The mobile operating system upgrade will also let users quickly switch between in-memory applications using an "app tray" that appears when users double-tap the iPhone's home button.
"256MB of system memory will still be pretty robust," said Vronko, but the iPhone 4's doubling means that it will seem snappier, be able to keep more programs in memory for instant access and, most importantly, eat up less battery power. That's because it won't have to swap out sections of system memory to the smartphone's flash RAM-based storage space.
The 256MB mark appears to be the minimum required for iOS 4 to multitask; while iPhone 3G owners can upgrade their phones to the new OS, they won't get multitasking.
By bumping up memory to 512MB, Apple leaves the door open to later expanding the iPhone 4's multitasking abilities. "The bigger issue is that this lets Apple release, maybe gradually, as it has always done with the iPhone, more functionality," said Vronko. "It can provide more [multitasking] APIs, maybe this year, maybe a year from now, that allow for more resource-hungry multitasking."
By this time in 2011, Vronko said, the difference between the iPhone 4's ability to multitask and that of the iPhone 3GS might be stark.
Half a gigabyte of system memory is now standard on top-tier smartphones from Apple's rivals, particularly those powered by Google's Android operating system, Vronko pointed out. "In a sense, then, Apple is just catching up.
"But Apple can better manage the memory it has in the iPhone with its centralized memory management than can Android phones," Vronko claimed. The difference isn't huge -- Vronko estimated that iPhone apps require 10%-20% less memory than similar Android software -- but every little bit helps.
The confirmation of 512MB in the iPhone 4 contradicts evidence gleaned from photographs of prototypes leaked by the Gizmodo technology blog in April, and a Vietnamese site last month. In both instance, experts said that the next-generation iPhone would probably have only 256MB, the same as in the iPhone 3GS and the iPad.
After examining the photographs published by Gizmodo, Vronko said that there was a 50-50 chance that the final version of the new iPhone would have 512MB of system memory.
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