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How to use flamegraph method of FactoryProf Package

Best Test-prof_ruby code snippet using FactoryProf.flamegraph

factory_prof.rb

Source:factory_prof.rb

1# frozen_string_literal: true2require "test_prof/factory_prof/printers/simple"3require "test_prof/factory_prof/printers/flamegraph"4require "test_prof/factory_prof/factory_builders/factory_bot"5require "test_prof/factory_prof/factory_builders/fabrication"6module TestProf7  # FactoryProf collects "factory stacks" that can be used to build8  # flamegraphs or detect most popular factories9  module FactoryProf10    FACTORY_BUILDERS = [FactoryBuilders::FactoryBot,11                        FactoryBuilders::Fabrication].freeze12    # FactoryProf configuration13    class Configuration14      attr_accessor :mode15      def initialize16        @mode = ENV["FPROF"] == "flamegraph" ? :flamegraph : :simple17      end18      # Whether we want to generate flamegraphs19      def flamegraph?20        @mode == :flamegraph21      end22    end23    class Result # :nodoc:24      attr_reader :stacks, :raw_stats25      def initialize(stacks, raw_stats)26        @stacks = stacks27        @raw_stats = raw_stats28      end29      # Returns sorted stats30      def stats31        @stats ||= @raw_stats.values32          .sort_by { |el| -el[:total_count] }33      end34      def total_count35        @total_count ||= @raw_stats.values.sum { |v| v[:total_count] }36      end37      def total_time38        @total_time ||= @raw_stats.values.sum { |v| v[:total_time] }39      end40      private41      def sorted_stats(key)42        @raw_stats.values43          .map { |el| [el[:name], el[key]] }44          .sort_by { |el| -el[1] }45      end46    end47    class << self48      include TestProf::Logging49      def config50        @config ||= Configuration.new51      end52      def configure53        yield config54      end55      # Patch factory lib, init vars56      def init57        @running = false58        log :info, "FactoryProf enabled (#{config.mode} mode)"59        FACTORY_BUILDERS.each(&:patch)60      end61      # Inits FactoryProf and setups at exit hook,62      # then runs63      def run64        init65        printer = config.flamegraph? ? Printers::Flamegraph : Printers::Simple66        at_exit { printer.dump(result) }67        start68      end69      def start70        reset!71        @running = true72      end73      def stop74        @running = false75      end76      def result77        Result.new(@stacks, @stats)78      end79      def track(factory)80        return yield unless running?81        @depth += 182        @current_stack << factory if config.flamegraph?83        @stats[factory][:total_count] += 184        @stats[factory][:top_level_count] += 1 if @depth == 185        t1 = TestProf.now86        begin87          yield88        ensure89          t2 = TestProf.now90          elapsed = t2 - t191          @stats[factory][:total_time] += elapsed92          @stats[factory][:top_level_time] += elapsed if @depth == 193          @depth -= 194          flush_stack if @depth.zero?95        end96      end97      private98      def reset!99        @stacks = [] if config.flamegraph?100        @depth = 0101        @stats = Hash.new do |h, k|102          h[k] = {103            name: k,104            total_count: 0,105            top_level_count: 0,106            total_time: 0.0,107            top_level_time: 0.0108          }109        end110        flush_stack111      end112      def flush_stack113        return unless config.flamegraph?114        @stacks << @current_stack unless @current_stack.nil? || @current_stack.empty?115        @current_stack = []116      end117      def running?118        @running == true119      end120    end121  end122end123TestProf.activate("FPROF") do124  TestProf::FactoryProf.run125end...

flamegraph

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