Hallo,
According to statprof, I am spending nearly 40% of my running time in lines which call 'board-ref', which is simply defined as:
(define board-ref u8vector-ref)
'u8vector-ref' seems a pretty low-level call, so I can't see how this can be improved further. It is just a macro around '##u8vector-ref'. Maybe using it directly instead of 'board-ref'? Or is this probably a memory alignment issue?
Cheers,