How copying an int made my code 11 times faster
https://medium.com/@robertgrosse/how-copying-an-int-made-my-code-11-times-faster-f76c66312e0f [medium.com]
2017-02-19 20:03
The trick is that like all generic interfaces in Rust, printing takes arguments by reference, regardless of whether they are Copy or not. The println! macro hides this from you by implicitly borrowing the arguments
source: L