Macro join 

macro_rules! join {
    ($f1:expr, $f2:expr) => { ... };
    ($f1:expr, $f2:expr, $($rest:expr),+) => { ... };
}

Executes multiple closures in parallel using rayon::join.

Usage

You can pass any number of closures:

rayon_join::join!(|| { /* task 1 */ }, || { /* task 2 */ }, || { /* task 3 */ });

You can also pass functions:

fn task1() { /* ... */ }
fn task2() { /* ... */ }
fn task3() { /* ... */ }
rayon_join::join!(task1, task2, task3);

If you need to pass arguments to the functions, use a closure:

fn task_with_arg(x: i32) { /* ... */ }
rayon_join::join!(|| task_with_arg(42), || task_with_arg(7));