Nope, I agree that base numpy operations are snappy. However I needed to both multiply by a sin wave of 550hz(changing input) and taper the edges of the signal

Nope, I agree that base numpy operations are snappy. However I needed to both multiply by a sin wave of 550hz(changing input) and taper the edges of the signal on the transition from 0->1 to not generate a ton of harmonics.