Factories lowest

rails_helper.rb

def red(text)
  "\033[31m#{text}\033[0m"
end

number_of_factories_to_analyze = 10
load_begin = Time.now
stats = {}
ActiveSupport::Notifications.subscribe("factory_bot.run_factory") do |_name, start, finish, _id, payload|
  execution_time_in_seconds = finish - start
  stats[payload[:name]] = stats[payload[:name]].to_f + execution_time_in_seconds
end

RSpec.configure do |config|
  config.after(:suite) do
    sorted_stats = stats.sort_by { |_name, execution_time| -execution_time }.take(number_of_factories_to_analyze)

    slowest_sum = sorted_stats.inject(0) { |sum, stat| sum + stat.last }
    total_time = Time.now - load_begin
    $stdout.puts "\nTop 10 slowest factories (#{slowest_sum.round(2)} seconds, #{(slowest_sum / total_time * 100).round(2)}% of total time):"

    sorted_stats.each do |name, execution_time|
      $stdout.puts "  #{red("#{execution_time.round(5)} seconds")} - #{name}"
    end
  end
end

Basta adicionar esse código no final do arquivo rails_helper e rodar os testes, no final ele vai mostrar os valores assim: