The array to evaluate.
The array to match against.
The evaluation predicate, which should return true if e1 is equal to e2 and false if not. This predicate may be any callable type.
The index of the first mismatch or N if the first N elements of bufA and bufB match, where N = min$(LP)bufA.length, bufB.length$(RP).
Performs a parallel linear scan of bufA and bufB from [0 .. N$(RP) where N = min(bufA.length, bufB.length), returning the index of the first element in bufA which does not match the corresponding element in bufB or N if no mismatch occurs. Comparisons will be performed using the supplied predicate or '==' if none is supplied.