Perform single copy + pointer select instead of double write for small types #29
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A previous optimization is no longer deemed worth it, new test results and understanding suggest that a single call to ptr::copy_nonoverlapping per element is more efficient for large input that don't fit into the last level cache. As well as for types like f128.
Zen 3 results
Firestorm results:
Icestorm results, honestly those look quite wonky, not sure if they should be trusted