There are many strategies to work on teaching your dog to come to you faster when called. One of my favorites is to work on a distance “stay”, and then ask the dog to “come”.
What happens very consistently is that dogs will pay attention as the trainer is walking backwards in anticipation of being released. Also, often dogs want to follow but are told they have to stay instead. “You want to come after me? Sorry you have to stay!” Think of it as reverse psychology.