Attempt to address perf regressions with #[inline]

Author: bstrie

library/core/src/array/mod.rs

@@ -331,18 +331,20 @@ impl<T: Ord, const N: usize> Ord for [T; N] {
 }
 
 #[cfg(not(bootstrap))]
-#[stable(feature = "copy_clone_array_lib", since = "1.55.0")]
+#[stable(feature = "copy_clone_array_lib", since = "1.58.0")]
 impl<T: Copy, const N: usize> Copy for [T; N] {}
 
 #[cfg(not(bootstrap))]
-#[stable(feature = "copy_clone_array_lib", since = "1.55.0")]
+#[stable(feature = "copy_clone_array_lib", since = "1.58.0")]
 impl<T: Clone, const N: usize> Clone for [T; N] {
+    #[inline]
     fn clone(&self) -> Self {
         // SAFETY: we know for certain that this iterator will yield exactly `N`
         // items.
         unsafe { collect_into_array_unchecked(&mut self.iter().cloned()) }
     }
 
+    #[inline]
     fn clone_from(&mut self, other: &Self) {
         self.clone_from_slice(other);
     }