Comment Comment by nilsbunger Anandtech had a good overview page of what 64-bit (and more generally, Armv8) does for performance:http://anandtech.com/show/7335/the-iphone-5s-review/4Basically, the new arch increased registers, increased register widths, and cleaned up some architectural warts in Arm that hurt performance.The "4GB memory" issue is a red herring -- 64-bit is about making all the paths through the chip wider to process more per cycle. parent nilsbunger 13 years ago
http://anandtech.com/show/7335/the-iphone-5s-review/4
Basically, the new arch increased registers, increased register widths, and cleaned up some architectural warts in Arm that hurt performance.
The "4GB memory" issue is a red herring -- 64-bit is about making all the paths through the chip wider to process more per cycle.