Why do Aldi cashiers work so fast?

Could you please explain why it seems that Aldi cashiers are able to process transactions at a much faster pace compared to other grocery stores? Do they have a unique training program or are there specific technological advancements in their POS systems that contribute to this efficiency? Additionally, are there any incentives in place for Aldi cashiers to maintain this high level of speed and accuracy, or is it simply a result of their work culture and dedication to customer satisfaction? I'm genuinely curious about the factors that contribute to this noticeable difference in service speed.