Effect of parallelization on conditional summation

If statement' is vectorization inhibiter that is prevents vectorization. But if statement is not parallelization inhibiter that is it allows parallelization. We take a problem in which conditional if statement is applied for addition of numbers of 2 series or arrays after multiplication. We measure time for addition of multiplication of series under certain condition, when ordinary sequential method is applied. Secondly we divide the entire problem into certain number of equal parts (Threads) and perform addition on different cores. Then we compute the speedup and other parameters.