From beb07fbfae845d20323a9863c7216c6b63aff9c7 Mon Sep 17 00:00:00 2001 From: Guo Xiang Tan Date: Wed, 15 Jul 2015 22:00:36 +0800 Subject: Revert "Revert "Reduce allocations when running AR callbacks."" MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit This reverts commit bdc1d329d4eea823d07cf010064bd19c07099ff3. Before: Calculating ------------------------------------- 22.000 i/100ms ------------------------------------------------- 229.700 (± 0.4%) i/s - 1.166k Total Allocated Object: 9939 After: Calculating ------------------------------------- 24.000 i/100ms ------------------------------------------------- 246.443 (± 0.8%) i/s - 1.248k Total Allocated Object: 7939 ``` begin require 'bundler/inline' rescue LoadError => e $stderr.puts 'Bundler version 1.10 or later is required. Please update your Bundler' raise e end gemfile(true) do source 'https://rubygems.org' # gem 'rails', github: 'rails/rails', ref: 'bdc1d329d4eea823d07cf010064bd19c07099ff3' gem 'rails', github: 'rails/rails', ref: 'd2876141d08341ec67cf6a11a073d1acfb920de7' gem 'arel', github: 'rails/arel' gem 'sqlite3' gem 'benchmark-ips' end require 'active_record' require 'benchmark/ips' ActiveRecord::Base.establish_connection('sqlite3::memory:') ActiveRecord::Migration.verbose = false ActiveRecord::Schema.define do create_table :users, force: true do |t| t.string :name, :email t.boolean :admin t.timestamps null: false end end class User < ActiveRecord::Base default_scope { where(admin: true) } end admin = true 1000.times do attributes = { name: "Lorem ipsum dolor sit amet, consectetur adipiscing elit.", email: "foobar@email.com", admin: admin } User.create!(attributes) admin = !admin end GC.disable Benchmark.ips(5, 3) do |x| x.report { User.all.to_a } end key = if RUBY_VERSION < '2.2' :total_allocated_object else :total_allocated_objects end before = GC.stat[key] User.all.to_a after = GC.stat[key] puts "Total Allocated Object: #{after - before}" ``` --- activemodel/lib/active_model/validations.rb | 2 +- activemodel/lib/active_model/validations/callbacks.rb | 2 +- 2 files changed, 2 insertions(+), 2 deletions(-) (limited to 'activemodel/lib') diff --git a/activemodel/lib/active_model/validations.rb b/activemodel/lib/active_model/validations.rb index 72094a26c0..5f1dde4aa3 100644 --- a/activemodel/lib/active_model/validations.rb +++ b/activemodel/lib/active_model/validations.rb @@ -404,7 +404,7 @@ module ActiveModel protected def run_validations! #:nodoc: - run_callbacks :validate + _run_validate_callbacks errors.empty? end diff --git a/activemodel/lib/active_model/validations/callbacks.rb b/activemodel/lib/active_model/validations/callbacks.rb index b4301c23e4..4b58ef66e3 100644 --- a/activemodel/lib/active_model/validations/callbacks.rb +++ b/activemodel/lib/active_model/validations/callbacks.rb @@ -109,7 +109,7 @@ module ActiveModel # Overwrite run validations to include callbacks. def run_validations! #:nodoc: - run_callbacks(:validation) { super } + _run_validation_callbacks { super } end end end -- cgit v1.2.3 From 5bb1d4d288d019e276335465d0389fd2f5246bfd Mon Sep 17 00:00:00 2001 From: schneems Date: Sun, 19 Jul 2015 16:19:15 -0500 Subject: Freeze string literals when not mutated. MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit I wrote a utility that helps find areas where you could optimize your program using a frozen string instead of a string literal, it's called [let_it_go](https://github.com/schneems/let_it_go). After going through the output and adding `.freeze` I was able to eliminate the creation of 1,114 string objects on EVERY request to [codetriage](codetriage.com). How does this impact execution? To look at memory: ```ruby require 'get_process_mem' mem = GetProcessMem.new GC.start GC.disable 1_114.times { " " } before = mem.mb after = mem.mb GC.enable puts "Diff: #{after - before} mb" ``` Creating 1,114 string objects results in `Diff: 0.03125 mb` of RAM allocated on every request. Or 1mb every 32 requests. To look at raw speed: ```ruby require 'benchmark/ips' number_of_objects_reduced = 1_114 Benchmark.ips do |x| x.report("freeze") { number_of_objects_reduced.times { " ".freeze } } x.report("no-freeze") { number_of_objects_reduced.times { " " } } end ``` We get the results ``` Calculating ------------------------------------- freeze 1.428k i/100ms no-freeze 609.000 i/100ms ------------------------------------------------- freeze 14.363k (± 8.5%) i/s - 71.400k no-freeze 6.084k (± 8.1%) i/s - 30.450k ``` Now we can do some maths: ```ruby ips = 6_226k # iterations / 1 second call_time_before = 1.0 / ips # seconds per iteration ips = 15_254 # iterations / 1 second call_time_after = 1.0 / ips # seconds per iteration diff = call_time_before - call_time_after number_of_objects_reduced * diff * 100 # => 0.4530373333993266 miliseconds saved per request ``` So we're shaving off 1 second of execution time for every 220 requests. Is this going to be an insane speed boost to any Rails app: nope. Should we merge it: yep. p.s. If you know of a method call that doesn't modify a string input such as [String#gsub](https://github.com/schneems/let_it_go/blob/b0e2da69f0cca87ab581022baa43291cdf48638c/lib/let_it_go/core_ext/string.rb#L37) please [give me a pull request to the appropriate file](https://github.com/schneems/let_it_go/blob/b0e2da69f0cca87ab581022baa43291cdf48638c/lib/let_it_go/core_ext/string.rb#L37), or open an issue in LetItGo so we can track and freeze more strings. Keep those strings Frozen ![](https://www.dropbox.com/s/z4dj9fdsv213r4v/let-it-go.gif?dl=1) --- activemodel/lib/active_model/attribute_methods.rb | 2 +- activemodel/lib/active_model/naming.rb | 2 +- activemodel/lib/active_model/validations/validates.rb | 2 +- 3 files changed, 3 insertions(+), 3 deletions(-) (limited to 'activemodel/lib') diff --git a/activemodel/lib/active_model/attribute_methods.rb b/activemodel/lib/active_model/attribute_methods.rb index 286cd6c206..9033ec0dca 100644 --- a/activemodel/lib/active_model/attribute_methods.rb +++ b/activemodel/lib/active_model/attribute_methods.rb @@ -372,7 +372,7 @@ module ActiveModel "define_method(:'#{name}') do |*args|" end - extra = (extra.map!(&:inspect) << "*args").join(", ") + extra = (extra.map!(&:inspect) << "*args").join(", ".freeze) target = if send =~ CALL_COMPILABLE_REGEXP "#{"self." unless include_private}#{send}(#{extra})" diff --git a/activemodel/lib/active_model/naming.rb b/activemodel/lib/active_model/naming.rb index 1f1749af4e..213f2d5b6a 100644 --- a/activemodel/lib/active_model/naming.rb +++ b/activemodel/lib/active_model/naming.rb @@ -192,7 +192,7 @@ module ActiveModel private def _singularize(string) - ActiveSupport::Inflector.underscore(string).tr('/', '_') + ActiveSupport::Inflector.underscore(string).tr('/'.freeze, '_'.freeze) end end diff --git a/activemodel/lib/active_model/validations/validates.rb b/activemodel/lib/active_model/validations/validates.rb index bda436d8d0..1da4df21e7 100644 --- a/activemodel/lib/active_model/validations/validates.rb +++ b/activemodel/lib/active_model/validations/validates.rb @@ -115,7 +115,7 @@ module ActiveModel key = "#{key.to_s.camelize}Validator" begin - validator = key.include?('::') ? key.constantize : const_get(key) + validator = key.include?('::'.freeze) ? key.constantize : const_get(key) rescue NameError raise ArgumentError, "Unknown validator: '#{key}'" end -- cgit v1.2.3 From f7ebdb1ac51f26cff76e5642a75717df1b446746 Mon Sep 17 00:00:00 2001 From: Zachary Scott Date: Tue, 5 May 2015 11:11:35 -0700 Subject: Remove XML Serialization from core. This includes the following classes: - ActiveModel::Serializers::Xml - ActiveRecord::Serialization::XmlSerializer --- activemodel/lib/active_model.rb | 1 - activemodel/lib/active_model/serialization.rb | 3 - activemodel/lib/active_model/serializers/xml.rb | 238 ------------------------ 3 files changed, 242 deletions(-) delete mode 100644 activemodel/lib/active_model/serializers/xml.rb (limited to 'activemodel/lib') diff --git a/activemodel/lib/active_model.rb b/activemodel/lib/active_model.rb index 8aa1b6f664..4e1b3f7495 100644 --- a/activemodel/lib/active_model.rb +++ b/activemodel/lib/active_model.rb @@ -58,7 +58,6 @@ module ActiveModel eager_autoload do autoload :JSON - autoload :Xml end end diff --git a/activemodel/lib/active_model/serialization.rb b/activemodel/lib/active_model/serialization.rb index f95849eb84..58d68d9620 100644 --- a/activemodel/lib/active_model/serialization.rb +++ b/activemodel/lib/active_model/serialization.rb @@ -40,7 +40,6 @@ module ActiveModel # # class Person # include ActiveModel::Serializers::JSON - # include ActiveModel::Serializers::Xml # # attr_accessor :name # @@ -55,13 +54,11 @@ module ActiveModel # person.serializable_hash # => {"name"=>nil} # person.as_json # => {"name"=>nil} # person.to_json # => "{\"name\":null}" - # person.to_xml # => "\n {"name"=>"Bob"} # person.as_json # => {"name"=>"Bob"} # person.to_json # => "{\"name\":\"Bob\"}" - # person.to_xml # => "\n:only, :except, :methods and # :include. The following are all valid examples: diff --git a/activemodel/lib/active_model/serializers/xml.rb b/activemodel/lib/active_model/serializers/xml.rb deleted file mode 100644 index e33c766627..0000000000 --- a/activemodel/lib/active_model/serializers/xml.rb +++ /dev/null @@ -1,238 +0,0 @@ -require 'active_support/core_ext/module/attribute_accessors' -require 'active_support/core_ext/array/conversions' -require 'active_support/core_ext/hash/conversions' -require 'active_support/core_ext/hash/slice' -require 'active_support/core_ext/time/acts_like' - -module ActiveModel - module Serializers - # == \Active \Model XML Serializer - module Xml - extend ActiveSupport::Concern - include ActiveModel::Serialization - - included do - extend ActiveModel::Naming - end - - class Serializer #:nodoc: - class Attribute #:nodoc: - attr_reader :name, :value, :type - - def initialize(name, serializable, value) - @name, @serializable = name, serializable - - if value.acts_like?(:time) && value.respond_to?(:in_time_zone) - value = value.in_time_zone - end - - @value = value - @type = compute_type - end - - def decorations - decorations = {} - decorations[:encoding] = 'base64' if type == :binary - decorations[:type] = (type == :string) ? nil : type - decorations[:nil] = true if value.nil? - decorations - end - - protected - - def compute_type - return if value.nil? - type = ActiveSupport::XmlMini::TYPE_NAMES[value.class.name] - type ||= :string if value.respond_to?(:to_str) - type ||= :yaml - type - end - end - - class MethodAttribute < Attribute #:nodoc: - end - - attr_reader :options - - def initialize(serializable, options = nil) - @serializable = serializable - @options = options ? options.dup : {} - end - - def serializable_hash - @serializable.serializable_hash(@options.except(:include)) - end - - def serializable_collection - methods = Array(options[:methods]).map(&:to_s) - serializable_hash.map do |name, value| - name = name.to_s - if methods.include?(name) - self.class::MethodAttribute.new(name, @serializable, value) - else - self.class::Attribute.new(name, @serializable, value) - end - end - end - - def serialize - require 'builder' unless defined? ::Builder - - options[:indent] ||= 2 - options[:builder] ||= ::Builder::XmlMarkup.new(indent: options[:indent]) - - @builder = options[:builder] - @builder.instruct! unless options[:skip_instruct] - - root = (options[:root] || @serializable.model_name.element).to_s - root = ActiveSupport::XmlMini.rename_key(root, options) - - args = [root] - args << { xmlns: options[:namespace] } if options[:namespace] - args << { type: options[:type] } if options[:type] && !options[:skip_types] - - @builder.tag!(*args) do - add_attributes_and_methods - add_includes - add_extra_behavior - add_procs - yield @builder if block_given? - end - end - - private - - def add_extra_behavior - end - - def add_attributes_and_methods - serializable_collection.each do |attribute| - key = ActiveSupport::XmlMini.rename_key(attribute.name, options) - ActiveSupport::XmlMini.to_tag(key, attribute.value, - options.merge(attribute.decorations)) - end - end - - def add_includes - @serializable.send(:serializable_add_includes, options) do |association, records, opts| - add_associations(association, records, opts) - end - end - - # TODO: This can likely be cleaned up to simple use ActiveSupport::XmlMini.to_tag as well. - def add_associations(association, records, opts) - merged_options = opts.merge(options.slice(:builder, :indent)) - merged_options[:skip_instruct] = true - - [:skip_types, :dasherize, :camelize].each do |key| - merged_options[key] = options[key] if merged_options[key].nil? && !options[key].nil? - end - - if records.respond_to?(:to_ary) - records = records.to_ary - - tag = ActiveSupport::XmlMini.rename_key(association.to_s, options) - type = options[:skip_types] ? { } : { type: "array" } - association_name = association.to_s.singularize - merged_options[:root] = association_name - - if records.empty? - @builder.tag!(tag, type) - else - @builder.tag!(tag, type) do - records.each do |record| - if options[:skip_types] - record_type = {} - else - record_class = (record.class.to_s.underscore == association_name) ? nil : record.class.name - record_type = { type: record_class } - end - - record.to_xml merged_options.merge(record_type) - end - end - end - else - merged_options[:root] = association.to_s - - unless records.class.to_s.underscore == association.to_s - merged_options[:type] = records.class.name - end - - records.to_xml merged_options - end - end - - def add_procs - if procs = options.delete(:procs) - Array(procs).each do |proc| - if proc.arity == 1 - proc.call(options) - else - proc.call(options, @serializable) - end - end - end - end - end - - # Returns XML representing the model. Configuration can be - # passed through +options+. - # - # Without any +options+, the returned XML string will include all the - # model's attributes. - # - # user = User.find(1) - # user.to_xml - # - # - # - # 1 - # David - # 16 - # 2011-01-30T22:29:23Z - # - # - # The :only and :except options can be used to limit the - # attributes included, and work similar to the +attributes+ method. - # - # To include the result of some method calls on the model use :methods. - # - # To include associations use :include. - # - # For further documentation, see ActiveRecord::Serialization#to_xml - def to_xml(options = {}, &block) - Serializer.new(self, options).serialize(&block) - end - - # Sets the model +attributes+ from an XML string. Returns +self+. - # - # class Person - # include ActiveModel::Serializers::Xml - # - # attr_accessor :name, :age, :awesome - # - # def attributes=(hash) - # hash.each do |key, value| - # instance_variable_set("@#{key}", value) - # end - # end - # - # def attributes - # instance_values - # end - # end - # - # xml = { name: 'bob', age: 22, awesome:true }.to_xml - # person = Person.new - # person.from_xml(xml) # => # - # person.name # => "bob" - # person.age # => 22 - # person.awesome # => true - def from_xml(xml) - self.attributes = Hash.from_xml(xml).values.first - self - end - end - end -end -- cgit v1.2.3 From 3c6fc5892f7fa1ab5044667d1b4c8a8c34db89ea Mon Sep 17 00:00:00 2001 From: Marcin Olichwirowicz Date: Wed, 12 Aug 2015 00:23:12 +0200 Subject: Rename match_attribute_method? to matched_attribute_method `match_attribute_method?` is a bit confusing because it suggest that a return value is a boolean which is not true. --- activemodel/lib/active_model/attribute_methods.rb | 8 ++++---- 1 file changed, 4 insertions(+), 4 deletions(-) (limited to 'activemodel/lib') diff --git a/activemodel/lib/active_model/attribute_methods.rb b/activemodel/lib/active_model/attribute_methods.rb index 9033ec0dca..77e4ce3afe 100644 --- a/activemodel/lib/active_model/attribute_methods.rb +++ b/activemodel/lib/active_model/attribute_methods.rb @@ -342,7 +342,7 @@ module ActiveModel private # The methods +method_missing+ and +respond_to?+ of this module are # invoked often in a typical rails, both of which invoke the method - # +match_attribute_method?+. The latter method iterates through an + # +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 @@ -429,7 +429,7 @@ module ActiveModel if respond_to_without_attributes?(method, true) super else - match = match_attribute_method?(method.to_s) + match = matched_attribute_method(method.to_s) match ? attribute_missing(match, *args, &block) : super end end @@ -454,7 +454,7 @@ module ActiveModel # but found among all methods. Which means that the given method is private. false else - !match_attribute_method?(method.to_s).nil? + !matched_attribute_method(method.to_s).nil? end end @@ -466,7 +466,7 @@ module ActiveModel private # Returns a struct representing the matching attribute method. # The struct's attributes are prefix, base and suffix. - def match_attribute_method?(method_name) + def matched_attribute_method(method_name) matches = self.class.send(:attribute_method_matchers_matching, method_name) matches.detect { |match| attribute_method?(match.attr_name) } end -- cgit v1.2.3