recursion

recursion.rb

require 'benchmark'

class Integer
  def performant_factorial
    (1..self).reduce(:*) || 1
  end

  def recursive_factorial
    self == 0 ? 1 : self * (self - 1).recursive_factorial
  end
end

N = 8_000

puts 'Performant:'
puts Benchmark.measure {
  N.performant_factorial
}

puts 'Recursive:'
puts Benchmark.measure {
  N.recursive_factorial
}