chore: checkpoint before Python removal

vendor/time/src/hint.rs

@@ -0,0 +1,24 @@
+//! Hints to the compiler that affects how code should be emitted or optimized.
+
+/// Indicate that a given branch is **not** likely to be taken, relatively speaking.
+#[inline(always)]
+#[cold]
+pub(crate) const fn cold_path() {}
+
+/// Indicate that a given condition is likely to be true.
+#[inline(always)]
+pub(crate) const fn likely(b: bool) -> bool {
+    if !b {
+        cold_path();
+    }
+    b
+}
+
+/// Indicate that a given condition is likely to be false.
+#[inline(always)]
+pub(crate) const fn unlikely(b: bool) -> bool {
+    if b {
+        cold_path();
+    }
+    b
+}