More code.
Change-Id: Ie53ea58b3d0e8e906a2e51752ecfbe1e434b4261
diff --git a/src/bin/tut2.rs b/src/bin/tut2.rs
new file mode 100644
index 0000000..702b870
--- /dev/null
+++ b/src/bin/tut2.rs
@@ -0,0 +1,42 @@
+#![allow(dead_code)]
+#![allow(unused_imports)]
+
+use rust_tutorial::*;
+
+/// Run this to see the disassembly of `compute_sum_of_squares_{1,2}`:
+///
+/// ```bash
+/// cargo objdump --bin tut2 --release -- -d | awk -v RS= '/^tut2::compute_sum_of_squares/'
+/// ```
+
+#[inline(never)]
+fn compute_sum_of_squares_1(xs: &Vec<i32>) -> i32 {
+ let mut acc = 0;
+ for x in xs {
+ acc += x * x;
+ }
+ acc
+}
+
+#[inline(never)]
+fn compute_sum_of_squares_2(xs: &Vec<i32>) -> i32 {
+ xs.iter()
+ .map(|x| x * x)
+ .fold(0, |acc, x| acc + x)
+}
+
+#[test]
+fn test_compute_sum_of_squares() {
+ let numbers = vec![1, 2, 3, 4, 5];
+ assert_eq!(compute_sum_of_squares_1(&numbers), compute_sum_of_squares_2(&numbers));
+}
+
+fn main() {
+ let numbers = vec![1, 2, 3, 4, 5];
+
+ let sum_of_squares_1 = compute_sum_of_squares_1(&numbers);
+ let sum_of_squares_2 = compute_sum_of_squares_2(&numbers);
+
+ println!("sum #1 = {}", sum_of_squares_1);
+ println!("sum #2 = {}", sum_of_squares_2);
+}