Rename dummy to benchmark

test/benchmark/benchmarking_support.rb

@@ -0,0 +1,66 @@
+require 'benchmark/ips'
+require 'json'
+
+# Add benchmarking runner from ruby-bench-suite
+# https://github.com/ruby-bench/ruby-bench-suite/blob/master/rails/benchmarks/support/benchmark_rails.rb
+module Benchmark
+  module ActiveModelSerializers
+    module TestMethods
+      def request(method, path)
+        response = Rack::MockRequest.new(BenchmarkApp).send(method, path)
+        if response.status.in?([404, 500])
+          fail "omg, #{method}, #{path}, '#{response.status}', '#{response.body}'"
+        end
+        response
+      end
+    end
+
+    # extend Benchmark with an `ams` method
+    def ams(label = nil, time:, disable_gc: true, warmup: 3, &block)
+      fail ArgumentError.new, 'block should be passed' unless block_given?
+
+      if disable_gc
+        GC.disable
+      else
+        GC.enable
+      end
+
+      report = Benchmark.ips(time, warmup, true) do |x|
+        x.report(label) { yield }
+      end
+
+      entry = report.entries.first
+
+      output = {
+        label: label,
+        version: ::ActiveModel::Serializer::VERSION.to_s,
+        iterations_per_second: entry.ips,
+        iterations_per_second_standard_deviation: entry.stddev_percentage,
+        total_allocated_objects_per_iteration: count_total_allocated_objects(&block)
+      }.to_json
+
+      puts output
+      output
+    end
+
+    def count_total_allocated_objects
+      if block_given?
+        key =
+          if RUBY_VERSION < '2.2'
+            :total_allocated_object
+          else
+            :total_allocated_objects
+          end
+
+        before = GC.stat[key]
+        yield
+        after = GC.stat[key]
+        after - before
+      else
+        -1
+      end
+    end
+  end
+
+  extend Benchmark::ActiveModelSerializers
+end