feat: add rayon

__concurrent/rayon/src/main.rs

@@ -0,0 +1,32 @@
+use rayon::prelude::*;
+
+fn main() {
+    println!("{}", sum_of_squares(&vec![11, 22, 3, 4, 5, 6, 7]));
+    println!("{}", fib_iterative(40));
+    println!("{}", fib_recursive(40));
+}
+
+fn sum_of_squares(input: &[i32]) -> i32 {
+    input.par_iter() // <-- just change that!
+         .map(|&i| i * i)
+         .sum()
+}
+
+fn fib_iterative(n: u128) -> u128 {
+    let mut a = 0;
+    let mut b = 1;
+    for _ in 0..n {
+        let c = a + b;
+        a = b;
+        b = c;
+    }
+    a
+}
+
+fn fib_recursive(n: u128) -> u128 {
+    if n < 2 {
+        return n;
+    }
+
+    fib_recursive(n - 1) + fib_recursive(n - 2)
+}