Generation iPhone not iPhoneOS 4.0 reasons?

Due to the older iPhone and iPod Touch close the multi-tasking, iPhone 4.0 announced leads no small controversy, some netizens criticized Apple this is forcing the user to buy a new machine.

But from an objective point of view, the old model of limited hardware configuration to open multiple tasks are not realistic. Following an experienced multitasking platform of the foreign media as we analyze why Apple took decisions on the important characteristics of most of the old model on giving up:

In all of the hardware, multiple tasks most rely heavily on the system memory (RAM).

Applications running in the background and how you will use part of the memory space to keep running. IPhone 3G and second generation iPod Touch (including 2009 8gbit models) memory only 128M, lower than the mainstream standards, forced to run multiple tasks easily lead to system crashes. After all, as We Rule such as the application of the killer memory itself can take up to one-quarter of the memory space, even in the current function limited iPhone multitasking run 4.0, it consumes system resources, and other basic features are rare. IPhone 3GS and the latest version of iPod's 256M memory, though not perfect, but there should be a lot of running.

Processor speed is critical.

From iPhone to iPhone 3GS 3G 412MHz 600MHz upgrade not surface forms, in the new schema and higher, driven by the users in nearly every task run on all feel the real speed. In multitasking mode, the processor on the impact of the current OS system will be expanded when the CPU is not only to take care of the front end running tasks, but also to allocate a small part of the background. IPhone 3G may in background processing certain tasks without errors, but run into some occupied a little more task is most likely caused the panic. In theory, a relatively new Apple product can make you are not aware of system resource consumption.