If those two functions both need to own the data you're passing in, then they should take it by value, because in Rust passing by value means giving ownership o

If those two functions both need to own the data you're passing in, then they should take it by value, because in Rust passing by value means giving ownership of the data to the thing you're passing it to. It might give it back (as a return value), but that's another matter. If a function only needs to use some data for a bit, it should borrow it i.e. pass by reference. And if you need to give ownership of some data to a function, and you also need that data for something else, you have to copy it, so that you can give one copy to a function to do what it wants with, and keep the other one for your own purposes.