perf(traverse): optimize TraverseScoping::generate_uid_name

crates/oxc_traverse/src/context/scoping.rs

@@ -218,7 +218,7 @@ impl TraverseScoping {
     pub fn generate_uid_name(&mut self, name: &str) -> CompactStr {
         // If `uid_names` is not already populated, initialize it
         if self.uid_names.is_none() {
-            self.init_uid_names();
+            self.uid_names = Some(self.init_uid_names());
         }
         let uid_names = self.uid_names.as_mut().unwrap();
 
@@ -413,9 +413,8 @@ impl TraverseScoping {
     ///
     /// Once this map is created, generating a UID is a relatively quick operation, rather than
     /// iterating over all symbols and unresolved references every time generate a UID.
-    fn init_uid_names(&mut self) {
-        let uid_names = self
-            .scopes
+    fn init_uid_names(&mut self) -> FxHashSet<CompactStr> {
+        self.scopes
             .root_unresolved_references()
             .keys()
             .chain(self.symbols.names.iter())
@@ -426,8 +425,7 @@ impl TraverseScoping {
                     None
                 }
             })
-            .collect();
-        self.uid_names = Some(uid_names);
+            .collect()
     }
 }