test performance of flatten vs flatten!

performance_test.rb

def test_preformance(name, *args)
	start = Time.new
	100000.times do |i|
		yield(args)
	end
	time = (Time.new - start) * 1000
	puts "#{name} time: #{time} ms"
	return time
end

def test(how_many)
	test_array = [1, 2, 3, [ 1, 2, 3, 4, [1, 2, 3, 4, 5, 6, 7], 8, [9]], 10]

	time_destructive = 0
	how_many.times { |i| time_destructive += test_preformance("#{i + 1}, destructive:", test_array) { |foo| foo.flatten! }; }
	puts "average: #{time_destructive / how_many} ms"
	puts

	time_non_destructive = 0
	how_many.times { |i| time_non_destructive += test_preformance("#{i + 1}, non_destructive:", test_array) { |foo| bar = foo.flatten }; }
	puts "average: #{time_non_destructive / how_many} ms"
	puts
end

test(10)