You should never pump your brakes, even if you have no ABS. What you should instead be doing is "threshold braking", so you should have as much brake pressure a

You should never pump your brakes, even if you have no ABS. What you should instead be doing is "threshold braking", so you should have as much brake pressure as you can without locking up the tires, and if you lock up, you release as much as you need until you're not locked up anymore. If you just pump the brakes in rhythm, you'll have longer a stopping distance as you're just alternating between no braking and too much braking. Thankfully most cars on the road at this point are going to have ABS, which just allows you to stand on the brake pedal in an emergency.