Claus Reinke wrote:
PS. perhaps on newer 64 bit machines, explicitly selecting
   32 bits can offer savings? I'd certainly expect selecting
   64 bits on a 32 bit machine to lead to slowdowns.

Unlikely, I'd have thought. We implement all the explicitly sized integral types by zero-extending or sign-extending to the size of an Int/Word. That's why there are no primitive types or operations for Word8#, Word16#, etc.

Cheers,
        Simon
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