Initial commit

Gemfile

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+source 'http://rubygems.org'
+
+gem 'perftools.rb', :git => 'git://github.com/bearded/perftools.rb.git', :branch => 'perftools-1.8'

Gemfile.lock

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+GIT
+  remote: git://github.com/bearded/perftools.rb.git
+  revision: df73f93e4dda8953e77ba3be2945f4bf806b07cf
+  branch: perftools-1.8
+  specs:
+    perftools.rb (0.5.6)
+
+GEM
+  remote: http://rubygems.org/
+  specs:
+
+PLATFORMS
+  ruby
+
+DEPENDENCIES
+  perftools.rb!

allocation.rb

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+# Taken from Aaron Patterson's blog
+# http://tenderlovemaking.com/2011/06/29/i-want-dtrace-probes-in-ruby/
+
+module Allocation
+  def self.count
+    GC.disable
+    before = ObjectSpace.count_objects
+    yield
+    after = ObjectSpace.count_objects
+    after.each { |k,v| after[k] = v - before[k] }
+    GC.enable
+    after
+  end
+end

dci_bm.rb

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+require 'benchmark'
+require './runner'
+
+class DCIUser; end
+
+Benchmark.bm do |bench|
+  3.times do
+    bench.report('DCI') do
+      1000000.times do
+        user = DCIUser.new
+        user.extend Runner
+        user.run
+      end
+    end
+  end
+end

dci_profile.rb

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+require 'perftools'
+require './runner'
+
+class DCIUser; end
+
+PerfTools::CpuProfiler.start('/tmp/dci_profile') do
+  1000000.times do
+    user = DCIUser.new
+    user.extend Runner
+    user.run
+  end
+end

dci_space.rb

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+require './runner'
+require './allocation'
+
+class DCIUser; end
+
+p(Allocation.count do
+  1000000.times do
+    user = DCIUser.new
+    user.extend Runner
+    user.run
+  end
+end)

include_bm.rb

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+require 'benchmark'
+require './runner'
+
+class IncludeUser
+  include Runner
+end
+
+Benchmark.bm do |bench|
+  3.times do
+    bench.report('include') do
+      1000000.times do
+        user = IncludeUser.new
+        user.run
+      end
+    end
+  end
+end

include_profile.rb

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+require 'perftools'
+require './runner'
+
+class IncludeUser
+  include Runner
+end
+
+PerfTools::CpuProfiler.start('/tmp/include_profile') do
+  1000000.times do
+    user = IncludeUser.new
+    user.run
+  end
+end

include_space.rb

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+require './runner'
+require './allocation'
+
+class IncludeUser
+  include Runner
+end
+
+p(Allocation.count do
+  1000000.times do
+    user = IncludeUser.new
+    user.run
+  end
+end)

runner.rb

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+module Runner
+  def self.included(base)
+    # p "Included into #{base.name}"
+  end
+
+  def self.extended(base)
+    # p "Extended into #{base.class.name}"
+  end
+
+  def run
+    Math.tan(Math::PI / 4)
+  end
+end