Creation of inquirer methods on the fly for performance boost

string_inquirer_patch.rb

module ActiveSupport
  module StringInquirerPatch

    def self.included klass
      klass.send :remove_method, :method_missing
    end

    def method_missing method_name, *arguments
      if method_name.to_s[-1,1] == "?"
        is_eql_to_self = (self == method_name.to_s[0..-2])
        define_singleton_method(method_name) { is_eql_to_self }
        is_eql_to_self
      else
        super
      end
    end

  end
end

ActiveSupport::StringInquirer.send :include, ActiveSupport::StringInquirerPatch