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author | Guo Xiang Tan <tgx_world@hotmail.com> | 2015-07-15 22:00:36 +0800 |
---|---|---|
committer | Guo Xiang Tan <tgx_world@hotmail.com> | 2015-07-16 01:02:15 +0800 |
commit | beb07fbfae845d20323a9863c7216c6b63aff9c7 (patch) | |
tree | ca37bca185b119ec2137632a38dd91aea107f249 /activesupport/lib/active_support | |
parent | 794252d70990162d14da17ee854ad353e74297ee (diff) | |
download | rails-beb07fbfae845d20323a9863c7216c6b63aff9c7.tar.gz rails-beb07fbfae845d20323a9863c7216c6b63aff9c7.tar.bz2 rails-beb07fbfae845d20323a9863c7216c6b63aff9c7.zip |
Revert "Revert "Reduce allocations when running AR callbacks.""
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}"
```
Diffstat (limited to 'activesupport/lib/active_support')
-rw-r--r-- | activesupport/lib/active_support/callbacks.rb | 14 |
1 files changed, 11 insertions, 3 deletions
diff --git a/activesupport/lib/active_support/callbacks.rb b/activesupport/lib/active_support/callbacks.rb index e8ab3a7db5..f35e1f5098 100644 --- a/activesupport/lib/active_support/callbacks.rb +++ b/activesupport/lib/active_support/callbacks.rb @@ -80,8 +80,12 @@ module ActiveSupport # save # end def run_callbacks(kind, &block) - callbacks = send("_#{kind}_callbacks") + send "_run_#{kind}_callbacks", &block + end + + private + def __run_callbacks__(callbacks, &block) if callbacks.empty? yield if block_given? else @@ -91,8 +95,6 @@ module ActiveSupport end end - private - # A hook invoked every time a before callback is halted. # This can be overridden in AS::Callback implementors in order # to provide better debugging/logging. @@ -806,6 +808,12 @@ module ActiveSupport names.each do |name| class_attribute "_#{name}_callbacks" set_callbacks name, CallbackChain.new(name, options) + + module_eval <<-RUBY, __FILE__, __LINE__ + 1 + def _run_#{name}_callbacks(&block) + __run_callbacks__(_#{name}_callbacks, &block) + end + RUBY end end |