Bump dependencies

src/assignments/assignment04/parser.rs

@@ -1,3 +1,5 @@
+#![allow(deprecated)]
+
 //! Parser.
 
 use super::syntax::*;

src/bin/par_iter.rs

@@ -0,0 +1,34 @@
+use std::time::Instant;
+
+use rayon::prelude::*;
+
+const SIZE: usize = 100_000_000;
+
+fn sequential() {
+    let _v = (0..SIZE)
+        .into_iter()
+        .filter_map(|x| if x % 2 == 0 { Some(x * 3) } else { None })
+        .collect::<Vec<_>>();
+}
+
+fn parallel() {
+    let _v = (0..SIZE)
+        .into_par_iter()
+        .filter_map(|x| if x % 2 == 0 { Some(x * 3) } else { None })
+        .collect::<Vec<_>>();
+}
+
+fn bench<F>(name: &str, f: F)
+where
+    F: FnOnce(),
+{
+    let begin = Instant::now();
+    f();
+    let elapsed = begin.elapsed();
+    println!("{}: {:.2?}", name, elapsed);
+}
+
+fn main() {
+    bench("sequential", sequential);
+    bench("parallel", parallel);
+}