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Re:64-bit ARM chips in iPhone 5S serve up taste of Intel-fre... by fleitz on Wednesday September 11, 2013 @01:20PM (#6368489)
Mostly expanding RAM beyond 4GB.

If you have tight numerical code that requires 64 bit floats/integers you may see a speed up.

If your code is for some reason register starved you may see a speedup.

Take the case of an app that downloads some JSON and makes a UITableView, it's not going to run much faster on 64 bit vs. 32 bit unless you're doing some extremely compute intensive image transforms.

Re:64-bit ARM chips in iPhone 5S serve up taste of Intel-fre... by coldtea on Wednesday September 11, 2013 @02:51PM (#6369131)
>unless you're doing some extremely compute intensive image transforms.

Which a lot of the best apps for the iPhone do quite a lot.

Especially since nobody cares about the performance of todo apps, those are good enough already.