method

attribute_method_matchers_cache

Ruby on Rails latest stable (v7.1.3.2) - 0 notes - Class: ActiveModel::AttributeMethods::ClassMethods

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What's this?

Method deprecated or moved

This method is deprecated or moved on the latest stable version. The last existing version (v7.0.0) is shown here.

attribute_method_matchers_cache() private

The methods method_missing and respond_to? of this module are invoked often in a typical rails, both of which invoke the method matched_attribute_method. The latter method iterates through an array doing regular expression matches, which results in a lot of object creations. Most of the time it returns a nil match. As the match result is always the same given a method_name, this cache is used to alleviate the GC, which ultimately also speeds up the app significantly (in our case our test suite finishes 10% faster with this cache).

Show source

# File activemodel/lib/active_model/attribute_methods.rb, line 378
        def attribute_method_matchers_cache
          @attribute_method_matchers_cache ||= Concurrent::Map.new(initial_capacity: 4)
        end

attribute_method_matchers_cache

Related methods

Method deprecated or moved