@BobJohn It's surprising because in my tests of other floating-point-heavy programs, 64-bit was up to 2x faster than 32-bit. I'm guessing because SSE2 was enabled in 64-bit mode.
However, I'm now confused exactly where trig functions are calculated. I thought the CPU had hardware for it but maybe not?
@sjb It all depends on the orientation of the flops and if they are in-silica optimised, otherwise your going to need a bigger bus.
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