README.md in alba-3.4.0 vs README.md in alba-3.5.0

@@ -684,11 +684,11 @@
 ```ruby
 Alba.serialize(something)
 # => Same as `FooResource.new(something).serialize` when `something` is an instance of `Foo`.
 ```
 
-Although this might be useful sometimes, it's generally recommended to define a class for Resource.
+Although this might be useful sometimes, it's generally recommended to define a class for Resource. Defining a class is often more readable and more maintainable, and inline definitions cannot levarage the benefit of YJIT (it's the slowest with the benchmark YJIT enabled).
 
 #### Inline definition for multiple root keys
 
 While Alba doesn't directly support multiple root keys, you can simulate it with `Alba.serialize`.
 
@@ -1154,10 +1154,10 @@
 end
 
 class UserResource
   include Alba::Resource
 
-  root_key!
+  root_key! # This is required to add inferred root key, otherwise it has no root key
 
   attributes :id
 
   many :articles
 end