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Callinc Rc a workaround is like calling i64 a workaround. It is a type that encodes a certain contract, it's there to be used. The advantage Rust has is that for 95% of your codebase the simple code using stack allocated values and references will be as fast as it can be, and yoi opt-into the slower behavior for the remaining 5% if they are not part of your performance critical path. If it is, then you need to rearchitect things, like you would in other languages. But you can do so after meaauring.