Vendor things

third-party/vendor/tracing/benches/baseline.rs

@@ -0,0 +1,24 @@
+use criterion::{black_box, criterion_group, criterion_main, Criterion};
+
+fn bench(c: &mut Criterion) {
+    use std::sync::atomic::{AtomicUsize, Ordering};
+
+    let mut group = c.benchmark_group("comparison");
+    group.bench_function("relaxed_load", |b| {
+        let foo = AtomicUsize::new(1);
+        b.iter(|| black_box(foo.load(Ordering::Relaxed)));
+    });
+    group.bench_function("acquire_load", |b| {
+        let foo = AtomicUsize::new(1);
+        b.iter(|| black_box(foo.load(Ordering::Acquire)))
+    });
+    group.bench_function("log", |b| {
+        b.iter(|| {
+            log::log!(log::Level::Info, "log");
+        })
+    });
+    group.finish();
+}
+
+criterion_group!(benches, bench);
+criterion_main!(benches);