aboutsummaryrefslogtreecommitdiffstats
path: root/activesupport/lib/active_support/testing/performance.rb
blob: 02c19448fd941761da0ae75321a2c63bb1fa0dcd (plain) (blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
require 'fileutils'
require 'rails/version'
require 'active_support/concern'
require 'active_support/core_ext/class/delegating_attributes'
require 'active_support/core_ext/string/inflections'
require 'action_view/helpers/number_helper'

module ActiveSupport
  module Testing
    module Performance
      extend ActiveSupport::Concern
      
      included do
        superclass_delegating_accessor :profile_options
        self.profile_options = {}

        if defined?(MiniTest::Assertions) && TestCase < MiniTest::Assertions
          include ForMiniTest
        else
          include ForClassicTestUnit
        end
      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
      
      module ForMiniTest
        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, :enumerator => :reverse_each
            rescue Exception => e
              result = @runner.puke(self.class, method_name, e)
            end
          end
          result
        end
      end

      module ForClassicTestUnit
        def run(result)
          return if method_name =~ /^default_test$/

          yield(self.class::STARTED, name)
          @_result = result

          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)
                result.add_run
              else
                puts '%20s: unsupported' % metric_name
              end
            end
          end

          yield(self.class::FINISHED, name)
        end

        def run_test(metric, mode)
          run_callbacks :setup
          setup
          metric.send(mode) { __send__ @method_name }
        rescue ::Test::Unit::AssertionFailedError => e
        add_failure(e.message, e.backtrace)
        rescue StandardError, ScriptError => e
          add_error(e)
        ensure
          begin
            teardown
            run_callbacks :teardown, :enumerator => :reverse_each
          rescue ::Test::Unit::AssertionFailedError => e
            add_failure(e.message, e.backtrace)
          rescue StandardError, ScriptError => e
            add_error(e)
          end
        end
      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
          unless defined? @env
            app = "#{$1}.#{$2}" if File.directory?('.git') && `git branch -v` =~ /^\* (\S+)\s+(\S+)/

            rails = Rails::VERSION::STRING
            if File.directory?('vendor/rails/.git')
              Dir.chdir('vendor/rails') do
                rails += ".#{$1}.#{$2}" if `git branch -v` =~ /^\* (\S+)\s+(\S+)/
              end
            end

            ruby = defined?(RUBY_ENGINE) ? RUBY_ENGINE : 'ruby'
            ruby += "-#{RUBY_VERSION}.#{RUBY_PATCHLEVEL}"

            @env = [app, rails, ruby, RUBY_PLATFORM] * ','
          end

          @env
        end

        protected
          HEADER = 'measurement,created_at,app,rails,ruby,platform'

          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
      end
      
      module Metrics
        def self.[](name)
          const_get(name.to_s.camelize)
        rescue NameError
          nil
        end

        class Base
          include ActionView::Helpers::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_with_delimiter(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

RUBY_ENGINE = 'ruby' unless defined?(RUBY_ENGINE) # mri 1.8
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