chore: checkpoint before Python removal

vendor/time/benchmarks/util.rs

@@ -0,0 +1,54 @@
+use std::hint::black_box as bb;
+use std::sync::LazyLock;
+
+use criterion::Bencher;
+use time::util;
+
+/// Generate a representative sample of all years.
+fn representative_years() -> [i32; 800] {
+    static DATES: LazyLock<[i32; 800]> = LazyLock::new(|| {
+        let mut years = [0; _];
+        for year in -400..400 {
+            years[(year + 400) as usize] = year;
+        }
+        crate::shuffle(years)
+    });
+
+    *DATES
+}
+
+setup_benchmark! {
+    "Utils",
+
+    fn noop(ben: &mut Bencher<'_>) {
+        ben.iter(|| {
+            for i in representative_years() {
+                let _ = bb(i);
+            }
+        });
+    }
+
+    fn is_leap_year(ben: &mut Bencher<'_>) {
+        ben.iter(|| {
+            for year in representative_years() {
+                let _ = bb(util::is_leap_year(bb(year)));
+            }
+        });
+    }
+
+    fn days_in_year(ben: &mut Bencher<'_>) {
+        ben.iter(|| {
+            for year in representative_years() {
+                let _ = bb(util::days_in_year(bb(year)));
+            }
+        });
+    }
+
+    fn weeks_in_year(ben: &mut Bencher<'_>) {
+        ben.iter(|| {
+            for year in representative_years() {
+                let _ = bb(util::weeks_in_year(bb(year)));
+            }
+        });
+    }
+}