method_constant_lookup_instrumented.rb

class MyClass
  def foo_via_method
    p "Superclass Chain: #{self.class.ancestors}"
    p "Lexical Scope Chain: #{Module.nesting}"
    foo_method
  end

  def foo_via_constant
    p "Superclass Chain: #{self.class.ancestors}"
    p "Lexical Scope Chain: #{Module.nesting}"
    FOO_CONSTANT
  end
end

class SubClass < MyClass
  FOO_CONSTANT = "foo"

  def foo_method
    FOO_CONSTANT
  end
end