extract PerformanceTest into rails-performance_tests gem

21 files changed, 15 insertions, 901 deletions

diff --git a/actionpack/CHANGELOG.md b/actionpack/CHANGELOG.md
index 1a8f187979..7dea0e7fa5 100644
--- a/actionpack/CHANGELOG.md
+++ b/actionpack/CHANGELOG.md
@@ -1,5 +1,12 @@
 ## Rails 4.0.0 (unreleased) ##
 
+*   Extract `ActionDispatch::PerformanceTest` into https://github.com/rails/rails-perftest
+    You can add the gem to your Gemfile to keep using performance tests.
+
+        gem 'rails-perftest'
+
+    *Yves Senn*
+
 *   Added view_cache_dependency API for declaring dependencies that affect
     cache digest computation.
 
diff --git a/actionpack/lib/action_controller.rb b/actionpack/lib/action_controller.rb
index 1a13d7af29..9cacb3862b 100644
--- a/actionpack/lib/action_controller.rb
+++ b/actionpack/lib/action_controller.rb
@@ -42,7 +42,6 @@ module ActionController
 
   autoload :Integration,        'action_controller/deprecated/integration_test'
   autoload :IntegrationTest,    'action_controller/deprecated/integration_test'
-  autoload :PerformanceTest,    'action_controller/deprecated/performance_test'
   autoload :Routing,            'action_controller/deprecated'
   autoload :TestCase,           'action_controller/test_case'
   autoload :TemplateAssertions, 'action_controller/test_case'
diff --git a/actionpack/lib/action_controller/deprecated/performance_test.rb b/actionpack/lib/action_controller/deprecated/performance_test.rb
deleted file mode 100644
index c7ba5a2fe7..0000000000
--- a/actionpack/lib/action_controller/deprecated/performance_test.rb
+++ /dev/null
@@ -1,3 +0,0 @@
-ActionController::PerformanceTest = ActionDispatch::PerformanceTest
-
-ActiveSupport::Deprecation.warn 'ActionController::PerformanceTest is deprecated and will be removed, use ActionDispatch::PerformanceTest instead.'
diff --git a/actionpack/lib/action_dispatch.rb b/actionpack/lib/action_dispatch.rb
index b35761fb4a..9ab048b756 100644
--- a/actionpack/lib/action_dispatch.rb
+++ b/actionpack/lib/action_dispatch.rb
@@ -97,7 +97,6 @@ module ActionDispatch
     autoload :Assertions
     autoload :Integration
     autoload :IntegrationTest, 'action_dispatch/testing/integration'
-    autoload :PerformanceTest
     autoload :TestProcess
     autoload :TestRequest
     autoload :TestResponse
diff --git a/actionpack/lib/action_dispatch/testing/performance_test.rb b/actionpack/lib/action_dispatch/testing/performance_test.rb
deleted file mode 100644
index 13fe693c32..0000000000
--- a/actionpack/lib/action_dispatch/testing/performance_test.rb
+++ /dev/null
@@ -1,10 +0,0 @@
-require 'active_support/testing/performance'
-
-module ActionDispatch
-  # An integration test that runs a code profiler on your test methods.
-  # Profiling output for combinations of each test method, measurement, and
-  # output format are written to your tmp/performance directory.
-  class PerformanceTest < ActionDispatch::IntegrationTest
-    include ActiveSupport::Testing::Performance
-  end
-end
diff --git a/activesupport/CHANGELOG.md b/activesupport/CHANGELOG.md
index 5848f9712f..2c0d1de70f 100644
--- a/activesupport/CHANGELOG.md
+++ b/activesupport/CHANGELOG.md
@@ -1,5 +1,13 @@
 ## Rails 4.0.0 (unreleased) ##
 
+*   Extract `ActiveSupport::Testing::Performance` into https://github.com/rails/rails-perftest
+    You can add the gem to your Gemfile to keep using performance tests.
+
+        gem 'rails-perftest'
+
+    *Yves Senn*
+
+
 *   Hash.from_xml raises when it encounters type="symbol" or type="yaml".
     Use Hash.from_trusted_xml to parse this XML.
 
diff --git a/activesupport/lib/active_support/testing/performance.rb b/activesupport/lib/active_support/testing/performance.rb
deleted file mode 100644
index 7102ffe2ed..0000000000
--- a/activesupport/lib/active_support/testing/performance.rb
+++ /dev/null
@@ -1,271 +0,0 @@
-require 'fileutils'
-require 'active_support/concern'
-require 'active_support/core_ext/class/delegating_attributes'
-require 'active_support/core_ext/string/inflections'
-require 'active_support/core_ext/module/delegation'
-require 'active_support/number_helper'
-
-module ActiveSupport
-  module Testing
-    module Performance
-      extend ActiveSupport::Concern
-
-      included do
-        superclass_delegating_accessor :profile_options
-        self.profile_options = {}
-      end
-
-      # each implementation should define metrics and freeze the defaults
-      DEFAULTS =
-        if ARGV.include?('--benchmark') # HAX for rake test
-          { :runs => 4,
-            :output => 'tmp/performance',
-            :benchmark => true }
-        else
-          { :runs => 1,
-            :output => 'tmp/performance',
-            :benchmark => false }
-        end
-
-      def full_profile_options
-        DEFAULTS.merge(profile_options)
-      end
-
-      def full_test_name
-        "#{self.class.name}##{method_name}"
-      end
-
-      def run(runner)
-        @runner = runner
-
-        run_warmup
-        if full_profile_options && metrics = full_profile_options[:metrics]
-          metrics.each do |metric_name|
-            if klass = Metrics[metric_name.to_sym]
-              run_profile(klass.new)
-            end
-          end
-        end
-
-        return
-      end
-
-      def run_test(metric, mode)
-        result = '.'
-        begin
-          run_callbacks :setup
-          setup
-          metric.send(mode) { __send__ method_name }
-        rescue Exception => e
-          result = @runner.puke(self.class, method_name, e)
-        ensure
-          begin
-            teardown
-            run_callbacks :teardown
-          rescue Exception => e
-            result = @runner.puke(self.class, method_name, e)
-          end
-        end
-        result
-      end
-
-      protected
-        # overridden by each implementation.
-        def run_gc; end
-
-        def run_warmup
-          run_gc
-
-          time = Metrics::Time.new
-          run_test(time, :benchmark)
-          puts "%s (%s warmup)" % [full_test_name, time.format(time.total)]
-
-          run_gc
-        end
-
-        def run_profile(metric)
-          klass = full_profile_options[:benchmark] ? Benchmarker : Profiler
-          performer = klass.new(self, metric)
-
-          performer.run
-          puts performer.report
-          performer.record
-        end
-
-      class Performer
-        delegate :run_test, :full_profile_options, :full_test_name, :to => :@harness
-
-        def initialize(harness, metric)
-          @harness, @metric, @supported = harness, metric, false
-        end
-
-        def report
-          if @supported
-            rate = @total / full_profile_options[:runs]
-            '%20s: %s' % [@metric.name, @metric.format(rate)]
-          else
-            '%20s: unsupported' % @metric.name
-          end
-        end
-
-        protected
-          def output_filename
-            "#{full_profile_options[:output]}/#{full_test_name}_#{@metric.name}"
-          end
-      end
-
-      # overridden by each implementation.
-      class Profiler < Performer
-        def time_with_block
-          before = Time.now
-          yield
-          Time.now - before
-        end
-
-        def run;    end
-        def record; end
-      end
-
-      class Benchmarker < Performer
-        def initialize(*args)
-          super
-          @supported = @metric.respond_to?('measure')
-        end
-
-        def run
-          return unless @supported
-
-          full_profile_options[:runs].to_i.times { run_test(@metric, :benchmark) }
-          @total = @metric.total
-        end
-
-        def record
-          avg = @metric.total / full_profile_options[:runs].to_i
-          now = Time.now.utc.xmlschema
-          with_output_file do |file|
-            file.puts "#{avg},#{now},#{environment}"
-          end
-        end
-
-        def environment
-          @env ||= [].tap do |env|
-            env << "#{$1}.#{$2}" if File.directory?('.git') && `git branch -v` =~ /^\* (\S+)\s+(\S+)/
-            env << rails_version if defined?(Rails::VERSION::STRING)
-            env << "#{RUBY_ENGINE}-#{RUBY_VERSION}.#{RUBY_PATCHLEVEL}"
-            env << RUBY_PLATFORM
-          end.join(',')
-        end
-
-        protected
-          if defined?(Rails::VERSION::STRING)
-            HEADER = 'measurement,created_at,app,rails,ruby,platform'
-          else
-            HEADER = 'measurement,created_at,app,ruby,platform'
-          end
-
-          def with_output_file
-            fname = output_filename
-
-            if new = !File.exist?(fname)
-              FileUtils.mkdir_p(File.dirname(fname))
-            end
-
-            File.open(fname, 'ab') do |file|
-              file.puts(HEADER) if new
-              yield file
-            end
-          end
-
-          def output_filename
-            "#{super}.csv"
-          end
-
-          def rails_version
-            "rails-#{Rails::VERSION::STRING}#{rails_branch}"
-          end
-
-          def rails_branch
-            if File.directory?('vendor/rails/.git')
-              Dir.chdir('vendor/rails') do
-                ".#{$1}.#{$2}" if `git branch -v` =~ /^\* (\S+)\s+(\S+)/
-              end
-            end
-          end
-      end
-
-      module Metrics
-        def self.[](name)
-          const_get(name.to_s.camelize)
-        rescue NameError
-          nil
-        end
-
-        class Base
-          include ActiveSupport::NumberHelper
-
-          attr_reader :total
-
-          def initialize
-            @total = 0
-          end
-
-          def name
-            @name ||= self.class.name.demodulize.underscore
-          end
-
-          def benchmark
-            with_gc_stats do
-              before = measure
-              yield
-              @total += (measure - before)
-            end
-          end
-
-          # overridden by each implementation.
-          def profile; end
-
-          protected
-            # overridden by each implementation.
-            def with_gc_stats; end
-        end
-
-        class Time < Base
-          def measure
-            ::Time.now.to_f
-          end
-
-          def format(measurement)
-            if measurement < 1
-              '%d ms' % (measurement * 1000)
-            else
-              '%.2f sec' % measurement
-            end
-          end
-        end
-
-        class Amount < Base
-          def format(measurement)
-            number_to_delimited(measurement.floor)
-          end
-        end
-
-        class DigitalInformationUnit < Base
-          def format(measurement)
-            number_to_human_size(measurement, :precision => 2)
-          end
-        end
-
-        # each implementation provides its own metrics like ProcessTime, Memory or GcRuns
-      end
-    end
-  end
-end
-
-case RUBY_ENGINE
-  when 'ruby'   then require 'active_support/testing/performance/ruby'
-  when 'rbx'    then require 'active_support/testing/performance/rubinius'
-  when 'jruby'  then require 'active_support/testing/performance/jruby'
-  else
-    $stderr.puts 'Your ruby interpreter is not supported for benchmarking.'
-    exit
-end
diff --git a/activesupport/lib/active_support/testing/performance/jruby.rb b/activesupport/lib/active_support/testing/performance/jruby.rb
deleted file mode 100644
index 34e3f9f45f..0000000000
--- a/activesupport/lib/active_support/testing/performance/jruby.rb
+++ /dev/null
@@ -1,115 +0,0 @@
-require 'jruby/profiler'
-require 'java'
-java_import java.lang.management.ManagementFactory
-
-module ActiveSupport
-  module Testing
-    module Performance
-      DEFAULTS.merge!(
-        if ARGV.include?('--benchmark')
-          {:metrics => [:wall_time, :user_time, :memory, :gc_runs, :gc_time]}
-        else
-          { :metrics => [:wall_time],
-            :formats => [:flat, :graph] }
-        end).freeze
-
-      protected
-        def run_gc
-          ManagementFactory.memory_mx_bean.gc
-        end
-
-      class Profiler < Performer
-        def initialize(*args)
-          super
-          @supported = @metric.is_a?(Metrics::WallTime)
-        end
-
-        def run
-          return unless @supported
-
-          @total = time_with_block do
-            @data = JRuby::Profiler.profile do
-              full_profile_options[:runs].to_i.times { run_test(@metric, :profile) }
-            end
-          end
-        end
-
-        def record
-          return unless @supported
-
-          klasses = full_profile_options[:formats].map { |f| JRuby::Profiler.const_get("#{f.to_s.camelize}ProfilePrinter") }.compact
-
-          klasses.each do |klass|
-            fname = output_filename(klass)
-            FileUtils.mkdir_p(File.dirname(fname))
-            File.open(fname, 'wb') do |file|
-              klass.new(@data).printProfile(file)
-            end
-          end
-        end
-
-        protected
-          def output_filename(printer_class)
-            suffix =
-              case printer_class.name.demodulize
-                when 'FlatProfilePrinter';  'flat.txt'
-                when 'GraphProfilePrinter'; 'graph.txt'
-                else printer_class.name.sub(/ProfilePrinter$/, '').underscore
-              end
-
-            "#{super()}_#{suffix}"
-          end
-      end
-
-      module Metrics
-        class Base
-          def profile
-            yield
-          end
-
-          protected
-            def with_gc_stats
-              ManagementFactory.memory_mx_bean.gc
-              yield
-            end
-        end
-
-        class WallTime < Time
-          def measure
-            super
-          end
-        end
-
-        class CpuTime < Time
-          def measure
-            ManagementFactory.thread_mx_bean.get_current_thread_cpu_time / 1000 / 1000 / 1000.0 # seconds
-          end
-        end
-
-        class UserTime < Time
-          def measure
-            ManagementFactory.thread_mx_bean.get_current_thread_user_time / 1000 / 1000 / 1000.0 # seconds
-          end
-        end
-
-        class Memory < DigitalInformationUnit
-          def measure
-            ManagementFactory.memory_mx_bean.non_heap_memory_usage.used + ManagementFactory.memory_mx_bean.heap_memory_usage.used
-          end
-        end
-
-        class GcRuns < Amount
-          def measure
-            ManagementFactory.garbage_collector_mx_beans.inject(0) { |total_runs, current_gc| total_runs += current_gc.collection_count }
-          end
-        end
-
-        class GcTime < Time
-          def measure
-            ManagementFactory.garbage_collector_mx_beans.inject(0) { |total_time, current_gc| total_time += current_gc.collection_time } / 1000.0 # seconds
-          end
-        end
-      end
-    end
-  end
-end
diff --git a/activesupport/lib/active_support/testing/performance/rubinius.rb b/activesupport/lib/active_support/testing/performance/rubinius.rb
deleted file mode 100644
index d9ebfbe352..0000000000
--- a/activesupport/lib/active_support/testing/performance/rubinius.rb
+++ /dev/null
@@ -1,113 +0,0 @@
-require 'rubinius/agent'
-
-module ActiveSupport
-  module Testing
-    module Performance
-      DEFAULTS.merge!(
-        if ARGV.include?('--benchmark')
-          {:metrics => [:wall_time, :memory, :objects, :gc_runs, :gc_time]}
-        else
-          { :metrics => [:wall_time],
-            :formats => [:flat, :graph] }
-        end).freeze
-
-      protected
-        def run_gc
-          GC.run(true)
-        end
-
-      class Performer; end
-
-      class Profiler < Performer
-        def initialize(*args)
-          super
-          @supported = @metric.is_a?(Metrics::WallTime)
-        end
-
-        def run
-          return unless @supported
-
-          @profiler = Rubinius::Profiler::Instrumenter.new
-
-          @total = time_with_block do
-            @profiler.profile(false) do
-              full_profile_options[:runs].to_i.times { run_test(@metric, :profile) }
-            end
-          end
-        end
-
-        def record
-          return unless @supported
-
-          if(full_profile_options[:formats].include?(:flat))
-            create_path_and_open_file(:flat) do |file|
-              @profiler.show(file)
-            end
-          end
-
-          if(full_profile_options[:formats].include?(:graph))
-            create_path_and_open_file(:graph) do |file|
-              @profiler.show(file)
-            end
-          end
-        end
-
-        protected
-          def create_path_and_open_file(printer_name)
-            fname = "#{output_filename}_#{printer_name}.txt"
-            FileUtils.mkdir_p(File.dirname(fname))
-            File.open(fname, 'wb') do |file|
-              yield(file)
-            end
-          end
-      end
-
-      module Metrics
-        class Base
-          attr_reader :loopback
-
-          def profile
-            yield
-          end
-
-          protected
-            def with_gc_stats
-              @loopback = Rubinius::Agent.loopback
-              GC.run(true)
-              yield
-            end
-        end
-
-        class WallTime < Time
-          def measure
-            super
-          end
-        end
-
-        class Memory < DigitalInformationUnit
-          def measure
-            loopback.get("system.memory.counter.bytes").last
-          end
-        end
-
-        class Objects < Amount
-          def measure
-            loopback.get("system.memory.counter.objects").last
-          end
-        end
-
-        class GcRuns < Amount
-          def measure
-            loopback.get("system.gc.full.count").last + loopback.get("system.gc.young.count").last
-          end
-        end
-
-        class GcTime < Time
-          def measure
-            (loopback.get("system.gc.full.wallclock").last + loopback.get("system.gc.young.wallclock").last) / 1000.0
-          end
-        end
-      end
-    end
-  end
-end
diff --git a/activesupport/lib/active_support/testing/performance/ruby.rb b/activesupport/lib/active_support/testing/performance/ruby.rb
deleted file mode 100644
index 7c149df1e4..0000000000
--- a/activesupport/lib/active_support/testing/performance/ruby.rb
+++ /dev/null
@@ -1,173 +0,0 @@
-begin
-  require 'ruby-prof'
-rescue LoadError
-  $stderr.puts 'Specify ruby-prof as application\'s dependency in Gemfile to run benchmarks.'
-  raise
-end
-
-module ActiveSupport
-  module Testing
-    module Performance
-      DEFAULTS.merge!(
-        if ARGV.include?('--benchmark')
-          { :metrics => [:wall_time, :memory, :objects, :gc_runs, :gc_time] }
-        else
-          { :min_percent => 0.01,
-            :metrics => [:process_time, :memory, :objects],
-            :formats => [:flat, :graph_html, :call_tree, :call_stack] }
-        end).freeze
-
-      protected
-        remove_method :run_gc
-        def run_gc
-          GC.start
-        end
-
-      class Profiler < Performer
-        def initialize(*args)
-          super
-          @supported = @metric.measure_mode rescue false
-        end
-
-        remove_method :run
-        def run
-          return unless @supported
-
-          RubyProf.measure_mode = @metric.measure_mode
-          RubyProf.start
-          RubyProf.pause
-          full_profile_options[:runs].to_i.times { run_test(@metric, :profile) }
-          @data = RubyProf.stop
-          @total = @data.threads.sum(0) { |thread| thread.methods.max.total_time }
-        end
-
-        remove_method :record
-        def record
-          return unless @supported
-
-          klasses = full_profile_options[:formats].map { |f| RubyProf.const_get("#{f.to_s.camelize}Printer") }.compact
-
-          klasses.each do |klass|
-            fname = output_filename(klass)
-            FileUtils.mkdir_p(File.dirname(fname))
-            File.open(fname, 'wb') do |file|
-              klass.new(@data).print(file, full_profile_options.slice(:min_percent))
-            end
-          end
-        end
-
-        protected
-          def output_filename(printer_class)
-            suffix =
-              case printer_class.name.demodulize
-                when 'FlatPrinter';                 'flat.txt'
-                when 'FlatPrinterWithLineNumbers';  'flat_line_numbers.txt'
-                when 'GraphPrinter';                'graph.txt'
-                when 'GraphHtmlPrinter';            'graph.html'
-                when 'GraphYamlPrinter';            'graph.yml'
-                when 'CallTreePrinter';             'tree.txt'
-                when 'CallStackPrinter';            'stack.html'
-                when 'DotPrinter';                  'graph.dot'
-                else printer_class.name.sub(/Printer$/, '').underscore
-              end
-
-            "#{super()}_#{suffix}"
-          end
-      end
-
-      module Metrics
-        class Base
-          def measure_mode
-            self.class::Mode
-          end
-
-          remove_method :profile
-          def profile
-            RubyProf.resume
-            yield
-          ensure
-            RubyProf.pause
-          end
-
-          protected
-            remove_method :with_gc_stats
-            def with_gc_stats
-              GC::Profiler.enable
-              GC.start
-              yield
-            ensure
-              GC::Profiler.disable
-            end
-        end
-
-        class ProcessTime < Time
-          Mode = RubyProf::PROCESS_TIME if RubyProf.const_defined?(:PROCESS_TIME)
-
-          def measure
-            RubyProf.measure_process_time
-          end
-        end
-
-        class WallTime < Time
-          Mode = RubyProf::WALL_TIME if RubyProf.const_defined?(:WALL_TIME)
-
-          def measure
-            RubyProf.measure_wall_time
-          end
-        end
-
-        class CpuTime < Time
-          Mode = RubyProf::CPU_TIME if RubyProf.const_defined?(:CPU_TIME)
-
-          def initialize(*args)
-            # FIXME: yeah my CPU is 2.33 GHz
-            RubyProf.cpu_frequency = 2.33e9 unless RubyProf.cpu_frequency > 0
-            super
-          end
-
-          def measure
-            RubyProf.measure_cpu_time
-          end
-        end
-
-        class Memory < DigitalInformationUnit
-          Mode = RubyProf::MEMORY if RubyProf.const_defined?(:MEMORY)
-
-          # Ruby 1.9 + GCdata patch
-          if GC.respond_to?(:malloc_allocated_size)
-            def measure
-              GC.malloc_allocated_size
-            end
-          end
-        end
-
-        class Objects < Amount
-          Mode = RubyProf::ALLOCATIONS if RubyProf.const_defined?(:ALLOCATIONS)
-
-          # Ruby 1.9 + GCdata patch
-          if GC.respond_to?(:malloc_allocations)
-            def measure
-              GC.malloc_allocations
-            end
-          end
-        end
-
-        class GcRuns < Amount
-          Mode = RubyProf::GC_RUNS if RubyProf.const_defined?(:GC_RUNS)
-
-          def measure
-            GC.count
-          end
-        end
-
-        class GcTime < Time
-          Mode = RubyProf::GC_TIME if RubyProf.const_defined?(:GC_TIME)
-
-          def measure
-            GC::Profiler.total_time
-          end
-        end
-      end
-    end
-  end
-end
diff --git a/activesupport/test/testing/performance_test.rb b/activesupport/test/testing/performance_test.rb
deleted file mode 100644
index 6918110cce..0000000000
--- a/activesupport/test/testing/performance_test.rb
+++ /dev/null
@@ -1,68 +0,0 @@
-require 'abstract_unit'
-
-module ActiveSupport
-  module Testing
-    class PerformanceTest < ActiveSupport::TestCase
-      begin
-        require 'active_support/testing/performance'
-        HAVE_RUBYPROF = true
-      rescue LoadError
-        HAVE_RUBYPROF = false
-      end
-
-      def setup
-        skip "no rubyprof" unless HAVE_RUBYPROF
-      end
-
-      def test_amount_format
-        amount_metric = ActiveSupport::Testing::Performance::Metrics[:amount].new
-        assert_equal "0", amount_metric.format(0)
-        assert_equal "1", amount_metric.format(1.23)
-        assert_equal "40,000,000", amount_metric.format(40000000)
-      end
-
-      def test_time_format
-        time_metric = ActiveSupport::Testing::Performance::Metrics[:time].new
-        assert_equal "0 ms", time_metric.format(0)
-        assert_equal "40 ms", time_metric.format(0.04)
-        assert_equal "41 ms", time_metric.format(0.0415)
-        assert_equal "1.23 sec", time_metric.format(1.23)
-        assert_equal "40000.00 sec", time_metric.format(40000)
-        assert_equal "-5000 ms", time_metric.format(-5)
-      end
-
-      def test_space_format
-        space_metric = ActiveSupport::Testing::Performance::Metrics[:digital_information_unit].new
-        assert_equal "0 Bytes", space_metric.format(0)
-        assert_equal "0 Bytes", space_metric.format(0.4)
-        assert_equal "1 Byte", space_metric.format(1.23)
-        assert_equal "123 Bytes", space_metric.format(123)
-        assert_equal "123 Bytes", space_metric.format(123.45)
-        assert_equal "12 KB", space_metric.format(12345)
-        assert_equal "1.2 MB", space_metric.format(1234567)
-        assert_equal "9.3 GB", space_metric.format(10**10)
-        assert_equal "91 TB", space_metric.format(10**14)
-        assert_equal "910000 TB", space_metric.format(10**18)
-      end
-
-      def test_environment_format_without_rails
-        metric = ActiveSupport::Testing::Performance::Metrics[:time].new
-        benchmarker = ActiveSupport::Testing::Performance::Benchmarker.new(self, metric)
-        assert_equal "#{RUBY_ENGINE}-#{RUBY_VERSION}.#{RUBY_PATCHLEVEL},#{RUBY_PLATFORM}", benchmarker.environment
-      end
-
-      def test_environment_format_with_rails
-        rails, version = Module.new, Module.new
-        version.const_set :STRING, "4.0.0"
-        rails.const_set :VERSION, version
-        Object.const_set :Rails, rails
-
-        metric = ActiveSupport::Testing::Performance::Metrics[:time].new
-        benchmarker = ActiveSupport::Testing::Performance::Benchmarker.new(self, metric)
-        assert_equal "rails-4.0.0,#{RUBY_ENGINE}-#{RUBY_VERSION}.#{RUBY_PATCHLEVEL},#{RUBY_PLATFORM}", benchmarker.environment
-      ensure
-        Object.send :remove_const, :Rails
-      end
-    end
-  end
-end
diff --git a/railties/lib/rails/commands/benchmarker.rb b/railties/lib/rails/commands/benchmarker.rb
deleted file mode 100644
index b745b45e17..0000000000
--- a/railties/lib/rails/commands/benchmarker.rb
+++ /dev/null
@@ -1,34 +0,0 @@
-require 'optparse'
-require 'rails/test_help'
-require 'rails/performance_test_help'
-
-ARGV.push('--benchmark') # HAX
-require 'active_support/testing/performance'
-ARGV.pop
-
-def options
-  options = {}
-  defaults = ActiveSupport::Testing::Performance::DEFAULTS
-
-  OptionParser.new do |opt|
-    opt.banner = "Usage: rails benchmarker 'Ruby.code' 'Ruby.more_code' ... [OPTS]"
-    opt.on('-r', '--runs N', Numeric, 'Number of runs.', "Default: #{defaults[:runs]}") { |r| options[:runs] = r }
-    opt.on('-o', '--output PATH', String, 'Directory to use when writing the results.', "Default: #{defaults[:output]}") { |o| options[:output] = o }
-    opt.on('-m', '--metrics a,b,c', Array, 'Metrics to use.', "Default: #{defaults[:metrics].join(",")}") { |m| options[:metrics] = m.map(&:to_sym) }
-    opt.parse!(ARGV)
-  end
-
-  options
-end
-
-class BenchmarkerTest < ActionDispatch::PerformanceTest #:nodoc:
-  self.profile_options = options
-
-  ARGV.each do |expression|
-    eval <<-RUBY
-      def test_#{expression.parameterize('_')}
-        #{expression}
-      end
-    RUBY
-  end
-end
diff --git a/railties/lib/rails/commands/profiler.rb b/railties/lib/rails/commands/profiler.rb
deleted file mode 100644
index 315bcccf61..0000000000
--- a/railties/lib/rails/commands/profiler.rb
+++ /dev/null
@@ -1,32 +0,0 @@
-require 'optparse'
-require 'rails/test_help'
-require 'rails/performance_test_help'
-require 'active_support/testing/performance'
-
-def options
-  options = {}
-  defaults = ActiveSupport::Testing::Performance::DEFAULTS
-
-  OptionParser.new do |opt|
-    opt.banner = "Usage: rails profiler 'Ruby.code' 'Ruby.more_code' ... [OPTS]"
-    opt.on('-r', '--runs N', Numeric, 'Number of runs.', "Default: #{defaults[:runs]}") { |r| options[:runs] = r }
-    opt.on('-o', '--output PATH', String, 'Directory to use when writing the results.', "Default: #{defaults[:output]}") { |o| options[:output] = o }
-    opt.on('-m', '--metrics a,b,c', Array, 'Metrics to use.', "Default: #{defaults[:metrics].join(",")}") { |m| options[:metrics] = m.map(&:to_sym) }
-    opt.on('-f', '--formats x,y,z', Array, 'Formats to output to.', "Default: #{defaults[:formats].join(",")}") { |m| options[:formats] = m.map(&:to_sym) }
-    opt.parse!(ARGV)
-  end
-
-  options
-end
-
-class ProfilerTest < ActionDispatch::PerformanceTest #:nodoc:
-  self.profile_options = options
-
-  ARGV.each do |expression|
-    eval <<-RUBY
-      def test_#{expression.parameterize('_')}
-        #{expression}
-      end
-    RUBY
-  end
-end
diff --git a/railties/lib/rails/generators/rails/app/templates/test/performance/browsing_test.rb b/railties/lib/rails/generators/rails/app/templates/test/performance/browsing_test.rb
deleted file mode 100644
index d09ce5ad34..0000000000
--- a/railties/lib/rails/generators/rails/app/templates/test/performance/browsing_test.rb
+++ /dev/null
@@ -1,12 +0,0 @@
-require 'test_helper'
-require 'rails/performance_test_help'
-
-class BrowsingTest < ActionDispatch::PerformanceTest
-  # Refer to the documentation for all available options
-  # self.profile_options = { runs: 5, metrics: [:wall_time, :memory],
-  #                          output: 'tmp/performance', formats: [:flat] }
-
-  test "homepage" do
-    get '/'
-  end
-end
diff --git a/railties/lib/rails/generators/rails/performance_test/USAGE b/railties/lib/rails/generators/rails/performance_test/USAGE
deleted file mode 100644
index 9dc799559c..0000000000
--- a/railties/lib/rails/generators/rails/performance_test/USAGE
+++ /dev/null
@@ -1,10 +0,0 @@
-Description:
-    Stubs out a new performance test. Pass the name of the test, either
-    CamelCased or under_scored, as an argument.
-
-    This generator invokes the current performance tool, which defaults to
-    TestUnit.
-
-Example:
-    `rails generate performance_test GeneralStories` creates a GeneralStories
-    performance test in test/performance/general_stories_test.rb
diff --git a/railties/lib/rails/generators/rails/performance_test/performance_test_generator.rb b/railties/lib/rails/generators/rails/performance_test/performance_test_generator.rb
deleted file mode 100644
index 56cd562f3d..0000000000
--- a/railties/lib/rails/generators/rails/performance_test/performance_test_generator.rb
+++ /dev/null
@@ -1,7 +0,0 @@
-module Rails
-  module Generators
-    class PerformanceTestGenerator < NamedBase # :nodoc:
-      hook_for :performance_tool, as: :performance
-    end
-  end
-end
diff --git a/railties/lib/rails/generators/test_unit/performance/performance_generator.rb b/railties/lib/rails/generators/test_unit/performance/performance_generator.rb
deleted file mode 100644
index 5552edeee4..0000000000
--- a/railties/lib/rails/generators/test_unit/performance/performance_generator.rb
+++ /dev/null
@@ -1,13 +0,0 @@
-require 'rails/generators/test_unit'
-
-module TestUnit # :nodoc:
-  module Generators # :nodoc:
-    class PerformanceGenerator < Base # :nodoc:
-      check_class_collision suffix: "Test"
-
-      def create_test_files
-        template 'performance_test.rb', File.join('test/performance', class_path, "#{file_name}_test.rb")
-      end
-    end
-  end
-end
diff --git a/railties/lib/rails/generators/test_unit/performance/templates/performance_test.rb b/railties/lib/rails/generators/test_unit/performance/templates/performance_test.rb
deleted file mode 100644
index 2bcb482d68..0000000000
--- a/railties/lib/rails/generators/test_unit/performance/templates/performance_test.rb
+++ /dev/null
@@ -1,12 +0,0 @@
-require 'test_helper'
-require 'rails/performance_test_help'
-
-class <%= class_name %>Test < ActionDispatch::PerformanceTest
-  # Refer to the documentation for all available options
-  # self.profile_options = { runs: 5, metrics: [:wall_time, :memory],
-  #                          output: 'tmp/performance', formats: [:flat] }
-
-  test "homepage" do
-    get '/'
-  end
-end
diff --git a/railties/lib/rails/performance_test_help.rb b/railties/lib/rails/performance_test_help.rb
deleted file mode 100644
index b1285efde2..0000000000
--- a/railties/lib/rails/performance_test_help.rb
+++ /dev/null
@@ -1,3 +0,0 @@
-ActionController::Base.perform_caching = true
-ActiveSupport::Dependencies.mechanism = :require
-Rails.logger.level = ActiveSupport::Logger::INFO
diff --git a/railties/lib/rails/test_unit/testing.rake b/railties/lib/rails/test_unit/testing.rake
index 9ad3a4e6d6..a18d28f958 100644
--- a/railties/lib/rails/test_unit/testing.rake
+++ b/railties/lib/rails/test_unit/testing.rake
@@ -146,15 +146,4 @@ namespace :test do
     t.libs << "test"
     t.pattern = 'test/integration/**/*_test.rb'
   end
-
-  Rails::SubTestTask.new(benchmark: 'test:prepare') do |t|
-    t.libs << 'test'
-    t.pattern = 'test/performance/**/*_test.rb'
-    t.options = '-- --benchmark'
-  end
-
-  Rails::SubTestTask.new(profile: 'test:prepare') do |t|
-    t.libs << 'test'
-    t.pattern = 'test/performance/**/*_test.rb'
-  end
 end
diff --git a/railties/test/generators/performance_test_generator_test.rb b/railties/test/generators/performance_test_generator_test.rb
deleted file mode 100644
index 37f9857193..0000000000
--- a/railties/test/generators/performance_test_generator_test.rb
+++ /dev/null
@@ -1,12 +0,0 @@
-require 'generators/generators_test_helper'
-require 'rails/generators/rails/performance_test/performance_test_generator'
-
-class PerformanceTestGeneratorTest < Rails::Generators::TestCase
-  include GeneratorsTestHelper
-  arguments %w(performance)
-
-  def test_performance_test_skeleton_is_created
-    run_generator
-    assert_file "test/performance/performance_test.rb", /class PerformanceTest < ActionDispatch::PerformanceTest/
-  end
-end