The #[inline] attribute suggests to the compiler to replace function calls with the function body to reduce overhead in performance-critical code.
The #[inline] attribute hints to the compiler to replace a function call with the function's body to reduce call overhead, but it is only a suggestion and the compiler may ignore it. It helps most in small, frequently called functions within tight loops where the cost of the call outweighs the cost of duplicating the code.
#[inline]
fn add(a: i32, b: i32) -> i32 {
a + b
}
fn main() {
let result = add(2, 3);
}
The #[inline] attribute asks the compiler to paste a function's code directly where it is called instead of jumping to a separate location. This can make your program run faster by removing the overhead of the jump, similar to how a chef might chop ingredients right at the stove instead of walking to a prep table for every single item. Use it sparingly on small, hot-path functions to squeeze out performance gains.