Benchmark the Iterator implementation

Author: meithecatte

benchmarks/Cargo.toml

@@ -14,3 +14,8 @@ criterion = "0.3"
 name = "from_iterator"
 harness = false
 path = "from_iterator.rs"
+
+[[bench]]
+name = "iterator"
+harness = false
+path = "iterator.rs"

benchmarks/iterator.rs

@@ -0,0 +1,42 @@
+use criterion::{black_box, criterion_group, criterion_main, Criterion};
+use enumflags2::{bitflags, BitFlags};
+
+#[bitflags]
+#[repr(u16)]
+#[derive(Clone, Copy, Debug)]
+pub enum Test {
+    Flag1 = 1 << 0,
+    Flag2 = 1 << 1,
+    Flag3 = 1 << 2,
+    Flag4 = 1 << 3,
+    Flag5 = 1 << 4,
+    Flag6 = 1 << 5,
+    Flag7 = 1 << 6,
+    Flag8 = 1 << 7,
+    Flag9 = 1 << 8,
+    Flag10 = 1 << 9,
+    Flag11 = 1 << 10,
+    Flag12 = 1 << 11,
+}
+
+pub fn iterators(c: &mut Criterion) {
+    let v1 = BitFlags::<Test>::from_bits(0x003).unwrap();
+    let v2 = BitFlags::<Test>::from_bits(0x691).unwrap();
+    let v3 = BitFlags::<Test>::from_bits(0xfed).unwrap();
+
+    c.bench_function("iterate (2/12)", |b| {
+        b.iter(|| black_box(&v1).iter().collect::<Vec<_>>())
+    });
+
+    c.bench_function("iterate (5/12)", |b| {
+        b.iter(|| black_box(&v2).iter().collect::<Vec<_>>())
+    });
+
+    c.bench_function("iterate (10/12)", |b| {
+        b.iter(|| black_box(&v3).iter().collect::<Vec<_>>())
+    });
+}
+
+criterion_group!(benches, iterators);
+criterion_main!(benches);
+