refactor(transformer/class-properties): exit transform_class faster…

… if nothing to do (#7586)

Small optimization. Class properties transform doesn't have to do anything if the class has no properties, which will often be the case. Exit sooner in this case.

crates/oxc_transformer/src/es2022/class_properties/class.rs

@@ -339,6 +339,13 @@ impl<'a, 'ctx> ClassProperties<'a, 'ctx> {
             index_not_including_removed += 1;
         }
 
+        // Exit if nothing to transform
+        if instance_prop_count == 0 && !has_static_prop_or_static_block {
+            self.private_props_stack.push(None);
+            return;
+        }
+
+        // Add entry to `private_props_stack`
         if private_props.is_empty() {
             self.private_props_stack.push(None);
         } else {
@@ -353,11 +360,6 @@ impl<'a, 'ctx> ClassProperties<'a, 'ctx> {
             }));
         }
 
-        // Exit if nothing to transform
-        if instance_prop_count == 0 && !has_static_prop_or_static_block {
-            return;
-        }
-
         // Extract properties and static blocks from class body + substitute computed method keys
         let mut instance_inits = Vec::with_capacity(instance_prop_count);
         class.body.body.retain_mut(|element| {