MIN_SIZE = ENV.fetch('SMALL_ARRAY_MIN', 0).to_i MAX_SIZE = ENV.fetch('SMALL_ARRAY_MAX', 16).to_i ITERATIONS = ENV.fetch('SMALL_ARRAY_ITERATIONS', 100).to_i ARRAYS = (MIN_SIZE..MAX_SIZE).map do |size1| (MIN_SIZE..MAX_SIZE).map do |size2| [Array.new(size1) { rand(MAX_SIZE) }, Array.new(size2) { rand(MAX_SIZE) }] end end ITERATIONS.times do ARRAYS.each do |group| group.each do |arr1, arr2| arr1 | arr2 end end end