Optimizations are architecture specific meaning that all optimizations would have to be
rewritten for ARM. That's the nature of specialization. As it stands now cpuminer-opt
already contains 3 or 4 versions of many functions just to suppport the variations within
the x86_64 architecture.

An optimized ARM miner would essentially have to have rewritten all optimizations I imported as well
as the ones I've added over the past 2 years. This would require a very skilled, and highly paid,
ARM developper.

Your best bet for ARM at this time is an unoptimized miner that isn't tied to one specific arcitecture.