And even if you didn't, I wonder what the motivation is for trying to do it all in one loop. sum(byteVals != -128) + sum(intVals) should vectorize more ni

And even if you didn't, I wonder what the motivation is for trying to do it all in one loop. sum(byteVals != -128) + sum(intVals) should vectorize more nicely and be at least as cache friendly.