From 4492793e0ddc755b0db3a055fd9a2b9b215c656e Mon Sep 17 00:00:00 2001
From: Scott McMurray <scottmcm@users.noreply.github.com>
Date: Fri, 17 Feb 2023 11:46:19 -0800
Subject: [PATCH] Add a slightly-contrived tuple comparison benchmark

---
 library/core/benches/lib.rs   |  1 +
 library/core/benches/tuple.rs | 22 ++++++++++++++++++++++
 2 files changed, 23 insertions(+)
 create mode 100644 library/core/benches/tuple.rs

diff --git a/library/core/benches/lib.rs b/library/core/benches/lib.rs
index e4100120d82..74ef0949b8a 100644
--- a/library/core/benches/lib.rs
+++ b/library/core/benches/lib.rs
@@ -20,6 +20,7 @@
 mod pattern;
 mod slice;
 mod str;
+mod tuple;
 
 /// Returns a `rand::Rng` seeded with a consistent seed.
 ///
diff --git a/library/core/benches/tuple.rs b/library/core/benches/tuple.rs
new file mode 100644
index 00000000000..d9ff9d0dd93
--- /dev/null
+++ b/library/core/benches/tuple.rs
@@ -0,0 +1,22 @@
+use rand::prelude::*;
+use test::{black_box, Bencher};
+
+#[bench]
+fn bench_tuple_comparison(b: &mut Bencher) {
+    let mut rng = black_box(super::bench_rng());
+
+    let data = black_box([
+        ("core::iter::adapters::Chain", 123_usize),
+        ("core::iter::adapters::Clone", 456_usize),
+        ("core::iter::adapters::Copie", 789_usize),
+        ("core::iter::adapters::Cycle", 123_usize),
+        ("core::iter::adapters::Flatt", 456_usize),
+        ("core::iter::adapters::TakeN", 789_usize),
+    ]);
+
+    b.iter(|| {
+        let x = data.choose(&mut rng).unwrap();
+        let y = data.choose(&mut rng).unwrap();
+        [x < y, x <= y, x > y, x >= y]
+    });
+}