Use `debug_assert_eq` instead of `assert_eq` in `unbox_reference`
Before:  277,298
After:   272,957
Savings:   4,340
@@ -599,7 +599,7 @@ impl Term {
pub fn unbox_reference<T>(&self) -> &'static T {
const TAG_BOXED: usize = Boxed as usize;
- assert_eq!(
+ debug_assert_eq!(
self.tagged & TAG_BOXED,
TAG_BOXED,
"Term ({:#b}) is not tagged as boxed ({:#b})",
