Nah, they're pretty bad. They don't speculate or prefetch nearly as well as CPUs, and most code kind of relies on that to be fast. If you are programming for a

Nah, they're pretty bad. They don't speculate or prefetch nearly as well as CPUs, and most code kind of relies on that to be fast. If you are programming for a GPU and you want to go fast you generally have to work quite hard for it.