method

attribute_method_matchers_cache

v5.0.0.1 - Show latest stable - 0 notes - Class: ActiveModel::AttributeMethods::ClassMethods

1.0.0
1.1.6
1.2.6
2.0.3
2.1.0
2.2.1
2.3.8
3.0.0
3.0.9
3.1.0
3.2.1 (0)
3.2.8 (0)
3.2.13 (0)
4.0.2 (0)
4.1.8 (0)
4.2.1 (0)
4.2.7 (0)
4.2.9 (0)
5.0.0.1 (0)
5.1.7 (0)
5.2.3 (0)
6.0.0 (0)
6.1.3.1 (0)
6.1.7.7 (0)
7.0.0 (0)
7.1.3.2
7.1.3.4
What's this?

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 352
        def attribute_method_matchers_cache #:nodoc:
          @attribute_method_matchers_cache ||= Concurrent::Map.new(initial_capacity: 4)
        end

attribute_method_matchers_cache

Related methods