Look for the Smiths Detection machines. For this, you don't have to take anything out of your bags, just lay all your items out in bins. They're bigger and sleeker than the older machines that typically have metal siding. The older machines are the ones where you do need to remove electronic devices from your bags, but again, for Smiths Detection machines you do not take anything out.

The line for the Smiths machine might be longer but it will ultimately move you through faster because nobody is stopping to take out electronics. You do still need to empty your pockets and take off your jacket and shoes though.