Use SmartString for comments.

src/ast/script_fn.rs

@@ -34,7 +34,7 @@ pub struct ScriptFnDef {
     ///
     /// Each line in non-block doc-comments starts with `///`.
     #[cfg(feature = "metadata")]
-    pub comments: Box<[crate::Identifier]>,
+    pub comments: Box<[crate::SmartString]>,
 }
 
 impl fmt::Display for ScriptFnDef {

src/func/hashing.rs

@@ -27,7 +27,7 @@ impl Hasher for StraightHasher {
     fn finish(&self) -> u64 {
         self.0
     }
-    #[inline(always)]
+    #[cold]
     fn write(&mut self, _bytes: &[u8]) {
         panic!("StraightHasher can only hash u64 values");
     }

src/module/mod.rs

@@ -85,7 +85,7 @@ pub struct FuncInfoMetadata {
     pub return_type: Identifier,
     /// Comments.
     #[cfg(feature = "metadata")]
-    pub comments: Box<[Identifier]>,
+    pub comments: Box<[SmartString]>,
 }
 
 /// A type containing a single registered function.